Attachment 110607 Details for Bug 87099 – dmesg drm-intel-nightly 3.18.0-00343-gfc7bddc + drm/dp-mst: Remove branches before dropping the reference

dmesg drm-intel-nightly 3.18.0-00343-gfc7bddc + drm/dp-mst: Remove branches before dropping the reference

dmesg-boot-w-3outputs-remove-dp-2.log (text/plain), 273.93 KB, created by Daniel Martin on 2014-12-09 08:25:29 UTC

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Creator: Daniel Martin

Created: 2014-12-09 08:25:29 UTC

Size: 273.93 KB

patch

obsolete

>[    0.000000] Initializing cgroup subsys cpuset
>[    0.000000] Initializing cgroup subsys cpu
>[    0.000000] Initializing cgroup subsys cpuacct
>[    0.000000] Linux version 3.18.0-00343-gfc7bddc-dirty (dmartin@sn-dd496) (gcc version 4.9.1 20140903 (prerelease) (GCC) ) #12 SMP Tue Dec 9 09:04:37 CET 2014
>[    0.000000] Command line: BOOT_IMAGE=bzImage-current ip=:::::eth0:dhcp nfsroot=192.168.1.1:/srv/nfs/archlinux root=/dev/nfs nfsrootdebug ro drm.debug=0xe verbose loglevel=8
>[    0.000000] e820: BIOS-provided physical RAM map:
>[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009cfff] usable
>[    0.000000] BIOS-e820: [mem 0x000000000009d000-0x000000000009ffff] reserved
>[    0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved
>[    0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000ce1e6fff] usable
>[    0.000000] BIOS-e820: [mem 0x00000000ce1e7000-0x00000000dcd3efff] reserved
>[    0.000000] BIOS-e820: [mem 0x00000000dcd3f000-0x00000000dce7efff] ACPI NVS
>[    0.000000] BIOS-e820: [mem 0x00000000dce7f000-0x00000000dcefefff] ACPI data
>[    0.000000] BIOS-e820: [mem 0x00000000dceff000-0x00000000df9fffff] reserved
>[    0.000000] BIOS-e820: [mem 0x00000000f8000000-0x00000000fbffffff] reserved
>[    0.000000] BIOS-e820: [mem 0x00000000fe101000-0x00000000fe112fff] reserved
>[    0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
>[    0.000000] BIOS-e820: [mem 0x00000000fed08000-0x00000000fed08fff] reserved
>[    0.000000] BIOS-e820: [mem 0x00000000fed10000-0x00000000fed19fff] reserved
>[    0.000000] BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed1ffff] reserved
>[    0.000000] BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved
>[    0.000000] BIOS-e820: [mem 0x00000000ffc00000-0x00000000ffffffff] reserved
>[    0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000031e5fffff] usable
>[    0.000000] NX (Execute Disable) protection: active
>[    0.000000] SMBIOS 2.7 present.
>[    0.000000] DMI: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[    0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
>[    0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
>[    0.000000] AGP: No AGP bridge found
>[    0.000000] e820: last_pfn = 0x31e600 max_arch_pfn = 0x400000000
>[    0.000000] MTRR default type: write-back
>[    0.000000] MTRR fixed ranges enabled:
>[    0.000000]   00000-9FFFF write-back
>[    0.000000]   A0000-BFFFF uncachable
>[    0.000000]   C0000-FFFFF write-protect
>[    0.000000] MTRR variable ranges enabled:
>[    0.000000]   0 base 00E0000000 mask 7FE0000000 uncachable
>[    0.000000]   1 base 00DE000000 mask 7FFE000000 uncachable
>[    0.000000]   2 base 00DD000000 mask 7FFF000000 uncachable
>[    0.000000]   3 base 00DCF00000 mask 7FFFF00000 uncachable
>[    0.000000]   4 disabled
>[    0.000000]   5 disabled
>[    0.000000]   6 disabled
>[    0.000000]   7 disabled
>[    0.000000]   8 disabled
>[    0.000000]   9 disabled
>[    0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
>[    0.000000] e820: last_pfn = 0xce1e7 max_arch_pfn = 0x400000000
>[    0.000000] found SMP MP-table at [mem 0x000f0100-0x000f010f] mapped at [ffff8800000f0100]
>[    0.000000] Scanning 1 areas for low memory corruption
>[    0.000000] Base memory trampoline at [ffff880000080000] 80000 size 24576
>[    0.000000] Using GB pages for direct mapping
>[    0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
>[    0.000000]  [mem 0x00000000-0x000fffff] page 4k
>[    0.000000] BRK [0x029c6000, 0x029c6fff] PGTABLE
>[    0.000000] BRK [0x029c7000, 0x029c7fff] PGTABLE
>[    0.000000] BRK [0x029c8000, 0x029c8fff] PGTABLE
>[    0.000000] init_memory_mapping: [mem 0x31e400000-0x31e5fffff]
>[    0.000000]  [mem 0x31e400000-0x31e5fffff] page 2M
>[    0.000000] BRK [0x029c9000, 0x029c9fff] PGTABLE
>[    0.000000] init_memory_mapping: [mem 0x31c000000-0x31e3fffff]
>[    0.000000]  [mem 0x31c000000-0x31e3fffff] page 2M
>[    0.000000] init_memory_mapping: [mem 0x300000000-0x31bffffff]
>[    0.000000]  [mem 0x300000000-0x31bffffff] page 2M
>[    0.000000] init_memory_mapping: [mem 0x00100000-0xce1e6fff]
>[    0.000000]  [mem 0x00100000-0x001fffff] page 4k
>[    0.000000]  [mem 0x00200000-0x3fffffff] page 2M
>[    0.000000]  [mem 0x40000000-0xbfffffff] page 1G
>[    0.000000]  [mem 0xc0000000-0xcdffffff] page 2M
>[    0.000000]  [mem 0xce000000-0xce1e6fff] page 4k
>[    0.000000] init_memory_mapping: [mem 0x100000000-0x2ffffffff]
>[    0.000000]  [mem 0x100000000-0x2ffffffff] page 1G
>[    0.000000] ACPI: Early table checksum verification disabled
>[    0.000000] ACPI: RSDP 0x00000000000F0120 000024 (v02 LENOVO)
>[    0.000000] ACPI: XSDT 0x00000000DCEFE170 0000DC (v01 LENOVO TP-GJ    00002280 PTEC 00000002)
>[    0.000000] ACPI: FACP 0x00000000DCEF8000 00010C (v05 LENOVO TP-GJ    00002280 PTEC 00000002)
>[    0.000000] ACPI: DSDT 0x00000000DCEE2000 010DFE (v01 LENOVO TP-GJ    00002280 INTL 20120711)
>[    0.000000] ACPI: FACS 0x00000000DCE4A000 000040
>[    0.000000] ACPI: SLIC 0x00000000DCEFD000 000176 (v01 LENOVO TP-GJ    00002280 PTEC 00000001)
>[    0.000000] ACPI: DBGP 0x00000000DCEFB000 000034 (v01 LENOVO TP-GJ    00002280 PTEC 00000002)
>[    0.000000] ACPI: ECDT 0x00000000DCEFA000 000052 (v01 LENOVO TP-GJ    00002280 PTEC 00000002)
>[    0.000000] ACPI: HPET 0x00000000DCEF7000 000038 (v01 LENOVO TP-GJ    00002280 PTEC 00000002)
>[    0.000000] ACPI: APIC 0x00000000DCEF6000 000098 (v01 LENOVO TP-GJ    00002280 PTEC 00000002)
>[    0.000000] ACPI: MCFG 0x00000000DCEF5000 00003C (v01 LENOVO TP-GJ    00002280 PTEC 00000002)
>[    0.000000] ACPI: SSDT 0x00000000DCEF4000 000033 (v01 LENOVO TP-SSDT1 00000100 INTL 20120711)
>[    0.000000] ACPI: SSDT 0x00000000DCEF3000 000486 (v01 LENOVO TP-SSDT2 00000200 INTL 20120711)
>[    0.000000] ACPI: SSDT 0x00000000DCEE1000 0009CB (v01 LENOVO SataAhci 00001000 INTL 20120711)
>[    0.000000] ACPI: SSDT 0x00000000DCEE0000 000152 (v01 LENOVO Rmv_Batt 00001000 INTL 20120711)
>[    0.000000] ACPI: SSDT 0x00000000DCEDF000 0007F5 (v01 LENOVO Cpu0Ist  00003000 INTL 20120711)
>[    0.000000] ACPI: SSDT 0x00000000DCEDE000 000AD8 (v01 LENOVO CpuPm    00003000 INTL 20120711)
>[    0.000000] ACPI: SSDT 0x00000000DCEDC000 00125C (v01 LENOVO SaSsdt   00003000 INTL 20120711)
>[    0.000000] ACPI: SSDT 0x00000000DCEDB000 000379 (v01 LENOVO CppcTabl 00001000 INTL 20120711)
>[    0.000000] ACPI: PCCT 0x00000000DCEDA000 00006E (v05 LENOVO TP-GJ    00002280 PTEC 00000002)
>[    0.000000] ACPI: SSDT 0x00000000DCED9000 000AC4 (v01 LENOVO Cpc_Tabl 00001000 INTL 20120711)
>[    0.000000] ACPI: UEFI 0x00000000DCED8000 000042 (v01 LENOVO TP-GJ    00002280 PTEC 00000002)
>[    0.000000] ACPI: MSDM 0x00000000DCE42000 000055 (v03 LENOVO TP-GJ    00002280 PTEC 00000002)
>[    0.000000] ACPI: ASF! 0x00000000DCEFC000 0000A5 (v32 LENOVO TP-GJ    00002280 PTEC 00000002)
>[    0.000000] ACPI: BATB 0x00000000DCED7000 000046 (v01 LENOVO TP-GJ    00002280 PTEC 00000002)
>[    0.000000] ACPI: FPDT 0x00000000DCED6000 000064 (v01 LENOVO TP-GJ    00002280 PTEC 00000002)
>[    0.000000] ACPI: UEFI 0x00000000DCED5000 0002F6 (v01 LENOVO TP-GJ    00002280 PTEC 00000002)
>[    0.000000] ACPI: Local APIC address 0xfee00000
>[    0.000000] No NUMA configuration found
>[    0.000000] Faking a node at [mem 0x0000000000000000-0x000000031e5fffff]
>[    0.000000] NODE_DATA(0) allocated [mem 0x31e5f9000-0x31e5fdfff]
>[    0.000000]  [ffffea0000000000-ffffea000c7fffff] PMD -> [ffff880312000000-ffff88031dbfffff] on node 0
>[    0.000000] Zone ranges:
>[    0.000000]   DMA      [mem 0x00001000-0x00ffffff]
>[    0.000000]   DMA32    [mem 0x01000000-0xffffffff]
>[    0.000000]   Normal   [mem 0x100000000-0x31e5fffff]
>[    0.000000] Movable zone start for each node
>[    0.000000] Early memory node ranges
>[    0.000000]   node   0: [mem 0x00001000-0x0009cfff]
>[    0.000000]   node   0: [mem 0x00100000-0xce1e6fff]
>[    0.000000]   node   0: [mem 0x100000000-0x31e5fffff]
>[    0.000000] Initmem setup node 0 [mem 0x00001000-0x31e5fffff]
>[    0.000000] On node 0 totalpages: 3065731
>[    0.000000]   DMA zone: 64 pages used for memmap
>[    0.000000]   DMA zone: 44 pages reserved
>[    0.000000]   DMA zone: 3996 pages, LIFO batch:0
>[    0.000000]   DMA32 zone: 13128 pages used for memmap
>[    0.000000]   DMA32 zone: 840167 pages, LIFO batch:31
>[    0.000000]   Normal zone: 34712 pages used for memmap
>[    0.000000]   Normal zone: 2221568 pages, LIFO batch:31
>[    0.000000] Reserving Intel graphics stolen memory at 0xdda00000-0xdf9fffff
>[    0.000000] ACPI: PM-Timer IO Port: 0x1808
>[    0.000000] ACPI: Local APIC address 0xfee00000
>[    0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
>[    0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled)
>[    0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x02] enabled)
>[    0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x03] enabled)
>[    0.000000] ACPI: LAPIC (acpi_id[0x05] lapic_id[0x00] disabled)
>[    0.000000] ACPI: LAPIC (acpi_id[0x06] lapic_id[0x00] disabled)
>[    0.000000] ACPI: LAPIC (acpi_id[0x07] lapic_id[0x00] disabled)
>[    0.000000] ACPI: LAPIC (acpi_id[0x08] lapic_id[0x00] disabled)
>[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
>[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
>[    0.000000] ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
>[    0.000000] IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-39
>[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
>[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
>[    0.000000] ACPI: IRQ0 used by override.
>[    0.000000] ACPI: IRQ9 used by override.
>[    0.000000] Using ACPI (MADT) for SMP configuration information
>[    0.000000] ACPI: HPET id: 0x8086a301 base: 0xfed00000
>[    0.000000] smpboot: Allowing 8 CPUs, 4 hotplug CPUs
>[    0.000000] e820: [mem 0xdfa00000-0xf7ffffff] available for PCI devices
>[    0.000000] setup_percpu: NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:8 nr_node_ids:1
>[    0.000000] PERCPU: Embedded 29 pages/cpu @ffff88031e200000 s80384 r8192 d30208 u262144
>[    0.000000] pcpu-alloc: s80384 r8192 d30208 u262144 alloc=1*2097152
>[    0.000000] pcpu-alloc: [0] 0 1 2 3 4 5 6 7 
>[    0.000000] Built 1 zonelists in Node order, mobility grouping on.  Total pages: 3017783
>[    0.000000] Policy zone: Normal
>[    0.000000] Kernel command line: BOOT_IMAGE=bzImage-current ip=:::::eth0:dhcp nfsroot=192.168.1.1:/srv/nfs/archlinux root=/dev/nfs nfsrootdebug ro drm.debug=0xe verbose loglevel=8
>[    0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
>[    0.000000] xsave: enabled xstate_bv 0x7, cntxt size 0x340 using standard form
>[    0.000000] AGP: Checking aperture...
>[    0.000000] AGP: No AGP bridge found
>[    0.000000] Memory: 11976272K/12262924K available (5000K kernel code, 998K rwdata, 2528K rodata, 1072K init, 14052K bss, 286652K reserved)
>[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=8, Nodes=1
>[    0.000000] Hierarchical RCU implementation.
>[    0.000000] 	RCU restricting CPUs from NR_CPUS=64 to nr_cpu_ids=8.
>[    0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=8
>[    0.000000] NR_IRQS:4352 nr_irqs:760 0
>[    0.000000] Console: colour VGA+ 80x25
>[    0.000000] console [tty0] enabled
>[    0.000000] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
>[    0.000000] ... MAX_LOCKDEP_SUBCLASSES:  8
>[    0.000000] ... MAX_LOCK_DEPTH:          48
>[    0.000000] ... MAX_LOCKDEP_KEYS:        8191
>[    0.000000] ... CLASSHASH_SIZE:          4096
>[    0.000000] ... MAX_LOCKDEP_ENTRIES:     32768
>[    0.000000] ... MAX_LOCKDEP_CHAINS:      65536
>[    0.000000] ... CHAINHASH_SIZE:          32768
>[    0.000000]  memory used by lock dependency info: 8159 kB
>[    0.000000]  per task-struct memory footprint: 1920 bytes
>[    0.000000] allocated 49283072 bytes of page_cgroup
>[    0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups
>[    0.000000] hpet clockevent registered
>[    0.000000] tsc: Fast TSC calibration using PIT
>[    0.000000] tsc: Detected 2693.857 MHz processor
>[    0.000061] Calibrating delay loop (skipped), value calculated using timer frequency.. 5389.20 BogoMIPS (lpj=8979523)
>[    0.000194] pid_max: default: 32768 minimum: 301
>[    0.000268] ACPI: Core revision 20140926
>[    0.045410] ACPI: All ACPI Tables successfully acquired
>[    0.049456] Dentry cache hash table entries: 2097152 (order: 12, 16777216 bytes)
>[    0.053935] Inode-cache hash table entries: 1048576 (order: 11, 8388608 bytes)
>[    0.055533] Mount-cache hash table entries: 32768 (order: 6, 262144 bytes)
>[    0.055651] Mountpoint-cache hash table entries: 32768 (order: 6, 262144 bytes)
>[    0.056477] Initializing cgroup subsys memory
>[    0.056550] Initializing cgroup subsys devices
>[    0.056631] Initializing cgroup subsys freezer
>[    0.056712] Initializing cgroup subsys blkio
>[    0.056810] CPU: Physical Processor ID: 0
>[    0.056872] CPU: Processor Core ID: 0
>[    0.056937] ENERGY_PERF_BIAS: Set to 'normal', was 'performance'
>ENERGY_PERF_BIAS: View and update with x86_energy_perf_policy(8)
>[    0.058106] mce: CPU supports 7 MCE banks
>[    0.058181] CPU0: Thermal monitoring enabled (TM1)
>[    0.058260] Last level iTLB entries: 4KB 1024, 2MB 1024, 4MB 1024
>Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB 1024, 1GB 4
>[    0.058547] Freeing SMP alternatives memory: 20K (ffffffff81c07000 - ffffffff81c0c000)
>[    0.058635] ftrace: allocating 19048 entries in 75 pages
>[    0.068458] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
>[    0.101519] smpboot: CPU0: Intel(R) Core(TM) i7-4600U CPU @ 2.10GHz (fam: 06, model: 45, stepping: 01)
>[    0.101729] TSC deadline timer enabled
>[    0.101827] Performance Events: PEBS fmt2+, 16-deep LBR, Haswell events, full-width counters, Intel PMU driver.
>[    0.102131] ... version:                3
>[    0.102194] ... bit width:              48
>[    0.102256] ... generic registers:      4
>[    0.102319] ... value mask:             0000ffffffffffff
>[    0.102384] ... max period:             0000ffffffffffff
>[    0.102449] ... fixed-purpose events:   3
>[    0.102512] ... event mask:             000000070000000f
>[    0.104649] x86: Booting SMP configuration:
>[    0.104714] .... node  #0, CPUs:      #1 #2 #3
>[    0.148387] x86: Booted up 1 node, 4 CPUs
>[    0.148507] smpboot: Total of 4 processors activated (21559.80 BogoMIPS)
>[    0.152940] NMI watchdog: enabled on all CPUs, permanently consumes one hw-PMU counter.
>[    0.153768] devtmpfs: initialized
>[    0.154338] PM: Registering ACPI NVS region [mem 0xdcd3f000-0xdce7efff] (1310720 bytes)
>[    0.155764] RTC time:  8:14:24, date: 12/09/14
>[    0.156060] NET: Registered protocol family 16
>[    0.169559] cpuidle: using governor ladder
>[    0.182924] cpuidle: using governor menu
>[    0.183046] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it
>[    0.183142] ACPI: bus type PCI registered
>[    0.183461] PCI: MMCONFIG for domain 0000 [bus 00-3f] at [mem 0xf8000000-0xfbffffff] (base 0xf8000000)
>[    0.183552] PCI: MMCONFIG at [mem 0xf8000000-0xfbffffff] reserved in E820
>[    0.183697] PCI: Using configuration type 1 for base access
>[    0.197091] ACPI: Added _OSI(Module Device)
>[    0.197157] ACPI: Added _OSI(Processor Device)
>[    0.197221] ACPI: Added _OSI(3.0 _SCP Extensions)
>[    0.197285] ACPI: Added _OSI(Processor Aggregator Device)
>[    0.206337] ACPI : EC: EC description table is found, configuring boot EC
>[    0.227641] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
>[    0.266758] ACPI: Dynamic OEM Table Load:
>[    0.266925] ACPI: SSDT 0xFFFF88030D1B0800 000436 (v01 PmRef  Cpu0Cst  00003001 INTL 20120711)
>[    0.280498] ACPI: Dynamic OEM Table Load:
>[    0.280664] ACPI: SSDT 0xFFFF88030D1B1000 0005AA (v01 PmRef  ApIst    00003000 INTL 20120711)
>[    0.300168] ACPI: Dynamic OEM Table Load:
>[    0.300333] ACPI: SSDT 0xFFFF88030D2D0000 000119 (v01 PmRef  ApCst    00003000 INTL 20120711)
>[    0.314856] ACPI: Interpreter enabled
>[    0.314926] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S1_] (20140926/hwxface-580)
>[    0.315097] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S2_] (20140926/hwxface-580)
>[    0.315294] ACPI: (supports S0 S3 S5)
>[    0.315356] ACPI: Using IOAPIC for interrupt routing
>[    0.315467] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
>[    0.334330] ACPI: Power Resource [PUBS] (on)
>[    0.335616] acpi PNP0C0A:01: ACPI dock station (docks/bays count: 1)
>[    0.336358] ACPI: Power Resource [NVP3] (on)
>[    0.336504] ACPI: Power Resource [NVP2] (on)
>[    0.406303] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 *11)
>[    0.406962] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 *9 10 11)
>[    0.407625] ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 *10 11)
>[    0.408277] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 *6 7 9 10 11)
>[    0.408929] ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 9 10 *11)
>[    0.409525] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 9 10 11) *0, disabled.
>[    0.410270] ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 9 *10 11)
>[    0.410929] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 *7 9 10 11)
>[    0.411599] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-3f])
>[    0.411672] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI]
>[    0.412116] acpi PNP0A08:00: _OSC: platform does not support [PCIeCapability]
>[    0.412334] acpi PNP0A08:00: _OSC: not requesting control; platform does not support [PCIeCapability]
>[    0.412426] acpi PNP0A08:00: _OSC: OS requested [PCIeHotplug PME AER PCIeCapability]
>[    0.412513] acpi PNP0A08:00: _OSC: platform willing to grant [PCIeHotplug PME AER]
>[    0.412599] acpi PNP0A08:00: _OSC failed (AE_SUPPORT); disabling ASPM
>[    0.412988] PCI host bridge to bus 0000:00
>[    0.413053] pci_bus 0000:00: root bus resource [bus 00-3f]
>[    0.413120] pci_bus 0000:00: root bus resource [io  0x0000-0x0cf7]
>[    0.413188] pci_bus 0000:00: root bus resource [io  0x0d00-0xffff]
>[    0.413256] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff]
>[    0.413326] pci_bus 0000:00: root bus resource [mem 0xdfa00000-0xfebfffff]
>[    0.413395] pci_bus 0000:00: root bus resource [mem 0xfed40000-0xfed4bfff]
>[    0.413498] pci 0000:00:00.0: [8086:0a04] type 00 class 0x060000
>[    0.413852] pci 0000:00:02.0: [8086:0a16] type 00 class 0x030000
>[    0.413940] pci 0000:00:02.0: reg 0x10: [mem 0xf0000000-0xf03fffff 64bit]
>[    0.414019] pci 0000:00:02.0: reg 0x18: [mem 0xe0000000-0xefffffff 64bit pref]
>[    0.414110] pci 0000:00:02.0: reg 0x20: [io  0x3000-0x303f]
>[    0.414434] pci 0000:00:03.0: [8086:0a0c] type 00 class 0x040300
>[    0.414516] pci 0000:00:03.0: reg 0x10: [mem 0xf0630000-0xf0633fff 64bit]
>[    0.414832] pci 0000:00:14.0: [8086:9c31] type 00 class 0x0c0330
>[    0.414923] pci 0000:00:14.0: reg 0x10: [mem 0xf0620000-0xf062ffff 64bit]
>[    0.415077] pci 0000:00:14.0: PME# supported from D3hot D3cold
>[    0.415264] pci 0000:00:14.0: System wakeup disabled by ACPI
>[    0.415451] pci 0000:00:16.0: [8086:9c3a] type 00 class 0x078000
>[    0.415544] pci 0000:00:16.0: reg 0x10: [mem 0xf0639000-0xf063901f 64bit]
>[    0.415710] pci 0000:00:16.0: PME# supported from D0 D3hot D3cold
>[    0.415958] pci 0000:00:16.3: [8086:9c3d] type 00 class 0x070002
>[    0.416047] pci 0000:00:16.3: reg 0x10: [io  0x30b0-0x30b7]
>[    0.416123] pci 0000:00:16.3: reg 0x14: [mem 0xf063f000-0xf063ffff]
>[    0.416447] pci 0000:00:19.0: [8086:155a] type 00 class 0x020000
>[    0.416535] pci 0000:00:19.0: reg 0x10: [mem 0xf0600000-0xf061ffff]
>[    0.416612] pci 0000:00:19.0: reg 0x14: [mem 0xf063e000-0xf063efff]
>[    0.416688] pci 0000:00:19.0: reg 0x18: [io  0x3080-0x309f]
>[    0.416839] pci 0000:00:19.0: PME# supported from D0 D3hot D3cold
>[    0.416987] pci 0000:00:19.0: System wakeup disabled by ACPI
>[    0.417187] pci 0000:00:1b.0: [8086:9c20] type 00 class 0x040300
>[    0.417275] pci 0000:00:1b.0: reg 0x10: [mem 0xf0634000-0xf0637fff 64bit]
>[    0.417442] pci 0000:00:1b.0: PME# supported from D0 D3hot D3cold
>[    0.417697] pci 0000:00:1c.0: [8086:9c1a] type 01 class 0x060400
>[    0.417865] pci 0000:00:1c.0: PME# supported from D0 D3hot D3cold
>[    0.418121] pci 0000:00:1c.1: [8086:9c14] type 01 class 0x060400
>[    0.418294] pci 0000:00:1c.1: PME# supported from D0 D3hot D3cold
>[    0.418447] pci 0000:00:1c.1: System wakeup disabled by ACPI
>[    0.418639] pci 0000:00:1d.0: [8086:9c26] type 00 class 0x0c0320
>[    0.418732] pci 0000:00:1d.0: reg 0x10: [mem 0xf063d000-0xf063d3ff]
>[    0.418921] pci 0000:00:1d.0: PME# supported from D0 D3hot D3cold
>[    0.419072] pci 0000:00:1d.0: System wakeup disabled by ACPI
>[    0.419254] pci 0000:00:1f.0: [8086:9c43] type 00 class 0x060100
>[    0.419623] pci 0000:00:1f.2: [8086:9c03] type 00 class 0x010601
>[    0.419710] pci 0000:00:1f.2: reg 0x10: [io  0x30a8-0x30af]
>[    0.419784] pci 0000:00:1f.2: reg 0x14: [io  0x30bc-0x30bf]
>[    0.419858] pci 0000:00:1f.2: reg 0x18: [io  0x30a0-0x30a7]
>[    0.419933] pci 0000:00:1f.2: reg 0x1c: [io  0x30b8-0x30bb]
>[    0.420007] pci 0000:00:1f.2: reg 0x20: [io  0x3060-0x307f]
>[    0.420082] pci 0000:00:1f.2: reg 0x24: [mem 0xf063c000-0xf063c7ff]
>[    0.422034] pci 0000:00:1f.2: PME# supported from D3hot
>[    0.422281] pci 0000:00:1f.3: [8086:9c22] type 00 class 0x0c0500
>[    0.422366] pci 0000:00:1f.3: reg 0x10: [mem 0xf0638000-0xf06380ff 64bit]
>[    0.422460] pci 0000:00:1f.3: reg 0x20: [io  0xefa0-0xefbf]
>[    0.422877] pci 0000:02:00.0: [10ec:5227] type 00 class 0xff0000
>[    0.423005] pci 0000:02:00.0: reg 0x10: [mem 0xf0500000-0xf0500fff]
>[    0.423573] pci 0000:02:00.0: supports D1 D2
>[    0.423637] pci 0000:02:00.0: PME# supported from D1 D2 D3hot D3cold
>[    0.432084] pci 0000:00:1c.0: PCI bridge to [bus 02]
>[    0.432156] pci 0000:00:1c.0:   bridge window [mem 0xf0500000-0xf05fffff]
>[    0.432501] pci 0000:03:00.0: [8086:08b2] type 00 class 0x028000
>[    0.432747] pci 0000:03:00.0: reg 0x10: [mem 0xf0400000-0xf0401fff 64bit]
>[    0.433363] pci 0000:03:00.0: PME# supported from D0 D3hot D3cold
>[    0.442231] pci 0000:00:1c.1: PCI bridge to [bus 03]
>[    0.442303] pci 0000:00:1c.1:   bridge window [mem 0xf0400000-0xf04fffff]
>[    0.444375] ACPI: Enabled 4 GPEs in block 00 to 7F
>[    0.444732] ACPI : EC: GPE = 0x25, I/O: command/status = 0x66, data = 0x62
>[    0.445215] vgaarb: setting as boot device: PCI:0000:00:02.0
>[    0.445283] vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
>[    0.445377] vgaarb: loaded
>[    0.445442] vgaarb: bridge control possible 0000:00:02.0
>[    0.445571] pps_core: LinuxPPS API ver. 1 registered
>[    0.445636] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
>[    0.445731] PTP clock support registered
>[    0.445827] PCI: Using ACPI for IRQ routing
>[    0.447564] PCI: pci_cache_line_size set to 64 bytes
>[    0.447962] e820: reserve RAM buffer [mem 0x0009d000-0x0009ffff]
>[    0.448034] e820: reserve RAM buffer [mem 0xce1e7000-0xcfffffff]
>[    0.448102] e820: reserve RAM buffer [mem 0x31e600000-0x31fffffff]
>[    0.448654] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0, 0, 0, 0, 0, 0
>[    0.449070] hpet0: 8 comparators, 64-bit 14.318180 MHz counter
>[    0.451212] Switched to clocksource hpet
>[    0.481251] pnp: PnP ACPI init
>[    0.482285] system 00:00: [mem 0x00000000-0x0009ffff] could not be reserved
>[    0.482358] system 00:00: [mem 0x000c0000-0x000c3fff] could not be reserved
>[    0.482429] system 00:00: [mem 0x000c4000-0x000c7fff] could not be reserved
>[    0.482500] system 00:00: [mem 0x000c8000-0x000cbfff] could not be reserved
>[    0.482570] system 00:00: [mem 0x000cc000-0x000cffff] could not be reserved
>[    0.482640] system 00:00: [mem 0x000d0000-0x000d3fff] has been reserved
>[    0.482710] system 00:00: [mem 0x000d4000-0x000d7fff] has been reserved
>[    0.482779] system 00:00: [mem 0x000d8000-0x000dbfff] has been reserved
>[    0.482848] system 00:00: [mem 0x000dc000-0x000dffff] has been reserved
>[    0.482918] system 00:00: [mem 0x000e0000-0x000e3fff] could not be reserved
>[    0.482989] system 00:00: [mem 0x000e4000-0x000e7fff] could not be reserved
>[    0.483059] system 00:00: [mem 0x000e8000-0x000ebfff] could not be reserved
>[    0.483129] system 00:00: [mem 0x000ec000-0x000effff] could not be reserved
>[    0.483200] system 00:00: [mem 0x000f0000-0x000fffff] could not be reserved
>[    0.483270] system 00:00: [mem 0x00100000-0xdf9fffff] could not be reserved
>[    0.483341] system 00:00: [mem 0xfec00000-0xffffffff] could not be reserved
>[    0.483434] system 00:00: Plug and Play ACPI device, IDs PNP0c01 (active)
>[    0.483809] system 00:01: [io  0x1800-0x189f] could not be reserved
>[    0.483880] system 00:01: [io  0x0800-0x087f] has been reserved
>[    0.483948] system 00:01: [io  0x0880-0x08ff] has been reserved
>[    0.484016] system 00:01: [io  0x0900-0x097f] has been reserved
>[    0.484084] system 00:01: [io  0x0980-0x09ff] has been reserved
>[    0.484152] system 00:01: [io  0x0a00-0x0a7f] has been reserved
>[    0.484220] system 00:01: [io  0x0a80-0x0aff] has been reserved
>[    0.484287] system 00:01: [io  0x0b00-0x0b7f] has been reserved
>[    0.484355] system 00:01: [io  0x0b80-0x0bff] has been reserved
>[    0.484423] system 00:01: [io  0x15e0-0x15ef] has been reserved
>[    0.484491] system 00:01: [io  0x1600-0x167f] has been reserved
>[    0.484569] system 00:01: [io  0x1640-0x165f] has been reserved
>[    0.484638] system 00:01: [mem 0xf8000000-0xfbffffff] has been reserved
>[    0.484709] system 00:01: [mem 0x00000000-0x00000fff] could not be reserved
>[    0.484779] system 00:01: [mem 0xfed1c000-0xfed1ffff] has been reserved
>[    0.484849] system 00:01: [mem 0xfed10000-0xfed13fff] has been reserved
>[    0.484918] system 00:01: [mem 0xfed18000-0xfed18fff] has been reserved
>[    0.484988] system 00:01: [mem 0xfed19000-0xfed19fff] has been reserved
>[    0.485057] system 00:01: [mem 0xfed45000-0xfed4bfff] has been reserved
>[    0.485127] system 00:01: [mem 0xfed40000-0xfed44fff] has been reserved
>[    0.485199] system 00:01: Plug and Play ACPI device, IDs PNP0c02 (active)
>[    0.485402] pnp 00:02: Plug and Play ACPI device, IDs PNP0b00 (active)
>[    0.485540] pnp 00:03: Plug and Play ACPI device, IDs LEN0071 PNP0303 (active)
>[    0.485690] pnp 00:04: Plug and Play ACPI device, IDs LEN0036 PNP0f13 (active)
>[    0.486520] pnp: PnP ACPI: found 5 devices
>[    0.495832] pci 0000:00:1c.0: PCI bridge to [bus 02]
>[    0.495904] pci 0000:00:1c.0:   bridge window [mem 0xf0500000-0xf05fffff]
>[    0.495981] pci 0000:00:1c.1: PCI bridge to [bus 03]
>[    0.496050] pci 0000:00:1c.1:   bridge window [mem 0xf0400000-0xf04fffff]
>[    0.496128] pci_bus 0000:00: resource 4 [io  0x0000-0x0cf7]
>[    0.496194] pci_bus 0000:00: resource 5 [io  0x0d00-0xffff]
>[    0.496261] pci_bus 0000:00: resource 6 [mem 0x000a0000-0x000bffff]
>[    0.496330] pci_bus 0000:00: resource 7 [mem 0xdfa00000-0xfebfffff]
>[    0.496398] pci_bus 0000:00: resource 8 [mem 0xfed40000-0xfed4bfff]
>[    0.496466] pci_bus 0000:02: resource 1 [mem 0xf0500000-0xf05fffff]
>[    0.496534] pci_bus 0000:03: resource 1 [mem 0xf0400000-0xf04fffff]
>[    0.496661] NET: Registered protocol family 2
>[    0.497116] TCP established hash table entries: 131072 (order: 8, 1048576 bytes)
>[    0.498163] TCP bind hash table entries: 65536 (order: 10, 4194304 bytes)
>[    0.502584] TCP: Hash tables configured (established 131072 bind 65536)
>[    0.502695] TCP: reno registered
>[    0.502969] UDP hash table entries: 8192 (order: 8, 1310720 bytes)
>[    0.504361] UDP-Lite hash table entries: 8192 (order: 8, 1310720 bytes)
>[    0.505795] NET: Registered protocol family 1
>[    0.506125] RPC: Registered named UNIX socket transport module.
>[    0.506195] RPC: Registered udp transport module.
>[    0.506259] RPC: Registered tcp transport module.
>[    0.506324] RPC: Registered tcp NFSv4.1 backchannel transport module.
>[    0.506408] pci 0000:00:02.0: Video device with shadowed ROM
>[    0.507418] PCI: CLS 64 bytes, default 64
>[    0.507651] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
>[    0.507721] software IO TLB [mem 0xca1e7000-0xce1e7000] (64MB) mapped at [ffff8800ca1e7000-ffff8800ce1e6fff]
>[    0.508336] RAPL PMU detected, hw unit 2^-14 Joules, API unit is 2^-32 Joules, 4 fixed counters 655360 ms ovfl timer
>[    0.508545] Scanning for low memory corruption every 60 seconds
>[    0.509368] futex hash table entries: 2048 (order: 6, 262144 bytes)
>[    0.509610] audit: initializing netlink subsys (disabled)
>[    0.509703] audit: type=2000 audit(1418112864.506:1): initialized
>[    0.510496] HugeTLB registered 2 MB page size, pre-allocated 0 pages
>[    0.517656] NFS: Registering the id_resolver key type
>[    0.517789] Key type id_resolver registered
>[    0.517863] Key type id_legacy registered
>[    0.517932] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
>[    0.518047] msgmni has been set to 23391
>[    0.518667] alg: No test for stdrng (krng)
>[    0.518866] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 250)
>[    0.519047] io scheduler noop registered
>[    0.519113] io scheduler deadline registered
>[    0.519285] io scheduler cfq registered (default)
>[    0.520147] intel_idle: MWAIT substates: 0x11142120
>[    0.520213] intel_idle: v0.4 model 0x45
>[    0.520275] intel_idle: lapic_timer_reliable_states 0xffffffff
>[    0.521419] input: Lid Switch as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input0
>[    0.521704] ACPI: Lid Switch [LID]
>[    0.521878] input: Sleep Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input1
>[    0.521993] ACPI: Sleep Button [SLPB]
>[    0.522191] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input2
>[    0.522279] ACPI: Power Button [PWRF]
>[    0.522404] GHES: HEST is not enabled!
>[    0.522828] e1000e: Intel(R) PRO/1000 Network Driver - 2.3.2-k
>[    0.522896] e1000e: Copyright(c) 1999 - 2014 Intel Corporation.
>[    0.523208] e1000e 0000:00:19.0: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
>[    0.523318] e1000e 0000:00:19.0: irq 40 for MSI/MSI-X
>[    0.690751] e1000e 0000:00:19.0 eth0: registered PHC clock
>[    0.690823] e1000e 0000:00:19.0 eth0: (PCI Express:2.5GT/s:Width x1) 28:d2:44:fa:90:28
>[    0.690910] e1000e 0000:00:19.0 eth0: Intel(R) PRO/1000 Network Connection
>[    0.691003] e1000e 0000:00:19.0 eth0: MAC: 11, PHY: 12, PBA No: 1000FF-0FF
>[    0.691206] i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12
>[    0.693083] serio: i8042 KBD port at 0x60,0x64 irq 1
>[    0.693174] serio: i8042 AUX port at 0x60,0x64 irq 12
>[    0.693558] mousedev: PS/2 mouse device common for all mice
>[    0.693676] Intel P-state driver initializing.
>[    0.694611] TCP: cubic registered
>[    0.694720] NET: Registered protocol family 17
>[    0.694964] Key type dns_resolver registered
>[    0.697874] registered taskstats version 1
>[    0.700944]   Magic number: 10:726:219
>[    0.701329] drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
>[    0.701337] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input4
>[    0.801468] e1000e 0000:00:19.0: irq 40 for MSI/MSI-X
>[    0.904522] e1000e 0000:00:19.0: irq 40 for MSI/MSI-X
>[    1.510948] tsc: Refined TSC clocksource calibration: 2693.764 MHz
>[    2.510792] Switched to clocksource tsc
>[    4.374874] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
>[    4.389851] Sending DHCP requests ., OK
>[    4.439829] IP-Config: Got DHCP answer from 192.168.1.1, my address is 192.168.1.119
>[    4.440025] IP-Config: Complete:
>[    4.440088]      device=eth0, hwaddr=28:d2:44:fa:90:28, ipaddr=192.168.1.119, mask=255.255.255.0, gw=192.168.1.1
>[    4.440179]      host=192.168.1.119, domain=, nis-domain=(none)
>[    4.440245]      bootserver=192.168.1.1, rootserver=192.168.1.1, rootpath=
>[    4.440298]      nameserver0=192.168.1.1
>
>[    4.446326] VFS: Mounted root (nfs filesystem) readonly on device 0:14.
>[    4.447397] Freeing unused kernel memory: 1072K (ffffffff81afb000 - ffffffff81c07000)
>[    4.449170] Write protecting the kernel read-only data: 10240k
>[    4.451650] Freeing unused kernel memory: 1136K (ffff8800014e4000 - ffff880001600000)
>[    4.454030] Freeing unused kernel memory: 1568K (ffff880001878000 - ffff880001a00000)
>[    4.520187] random: systemd urandom read with 15 bits of entropy available
>[    4.526990] systemd[1]: systemd 216 running in system mode. (+PAM -AUDIT -SELINUX -IMA -APPARMOR +SMACK -SYSVINIT +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ -LZ4 +SECCOMP +BLKID -ELFUTILS +KMOD -IDN )
>[    4.527587] systemd[1]: Detected architecture 'x86-64'.
>[    4.538123] systemd[1]: Failed to insert module 'autofs4'
>[    4.538262] systemd[1]: Failed to insert module 'ipv6'
>[    4.539158] systemd[1]: Set hostname to <archlinux>.
>[    4.685082] systemd[1]: Cannot add dependency job for unit display-manager.service, ignoring: Unit display-manager.service failed to load: No such file or directory.
>[    4.686309] systemd[1]: Starting Forward Password Requests to Wall Directory Watch.
>[    4.686681] systemd[1]: Started Forward Password Requests to Wall Directory Watch.
>[    4.686787] systemd[1]: Starting Remote File Systems.
>[    4.687239] systemd[1]: Reached target Remote File Systems.
>[    4.687329] systemd[1]: Starting Dispatch Password Requests to Console Directory Watch.
>[    4.687544] systemd[1]: Started Dispatch Password Requests to Console Directory Watch.
>[    4.687638] systemd[1]: Starting Paths.
>[    4.688032] systemd[1]: Reached target Paths.
>[    4.688098] systemd[1]: Starting Encrypted Volumes.
>[    4.688477] systemd[1]: Reached target Encrypted Volumes.
>[    4.688599] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point.
>[    4.688690] systemd[1]: Starting Swap.
>[    4.689068] systemd[1]: Reached target Swap.
>[    4.689134] systemd[1]: Starting Root Slice.
>[    4.699057] systemd[1]: Created slice Root Slice.
>[    4.699123] systemd[1]: Starting /dev/initctl Compatibility Named Pipe.
>[    4.699589] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
>[    4.699659] systemd[1]: Starting Delayed Shutdown Socket.
>[    4.700093] systemd[1]: Listening on Delayed Shutdown Socket.
>[    4.700160] systemd[1]: Starting Device-mapper event daemon FIFOs.
>[    4.700586] systemd[1]: Listening on Device-mapper event daemon FIFOs.
>[    4.700653] systemd[1]: Starting Journal Socket (/dev/log).
>[    4.701083] systemd[1]: Listening on Journal Socket (/dev/log).
>[    4.701158] systemd[1]: Starting udev Kernel Socket.
>[    4.701556] systemd[1]: Listening on udev Kernel Socket.
>[    4.701637] systemd[1]: Starting udev Control Socket.
>[    4.702088] systemd[1]: Listening on udev Control Socket.
>[    4.702159] systemd[1]: Starting User and Session Slice.
>[    4.703089] systemd[1]: Created slice User and Session Slice.
>[    4.703160] systemd[1]: Starting LVM2 metadata daemon socket.
>[    4.703597] systemd[1]: Listening on LVM2 metadata daemon socket.
>[    4.703665] systemd[1]: Starting Journal Socket.
>[    4.704093] systemd[1]: Listening on Journal Socket.
>[    4.704160] systemd[1]: Starting System Slice.
>[    4.704947] systemd[1]: Created slice System Slice.
>[    4.705404] systemd[1]: Mounting Temporary Directory...
>[    4.710937] systemd[1]: Starting Load Kernel Modules...
>[    4.713121] systemd[1]: Starting Create list of required static device nodes for the current kernel...
>[    4.714573] systemd[1]: Starting udev Coldplug all Devices...
>[    4.719755] systemd[1]: Started Set Up Additional Binary Formats.
>[    4.719863] systemd[1]: Starting Setup Virtual Console...
>[    4.722459] systemd[1]: Mounting Huge Pages File System...
>[    4.723997] systemd[1]: Mounting POSIX Message Queue File System...
>[    4.725535] systemd[1]: Mounting Debug File System...
>[    4.728068] systemd[1]: Starting system-getty.slice.
>[    4.729240] systemd[1]: Created slice system-getty.slice.
>[    4.729332] systemd[1]: Starting Journal Service...
>[    4.732370] systemd[1]: Started Journal Service.
>[    4.843571] systemd-udevd[99]: starting version 216
>[    4.851689] systemd-journald[73]: Received request to flush runtime journal from PID 1
>[    4.939068] ACPI: bus type USB registered
>[    4.939194] usbcore: registered new interface driver usbfs
>[    4.939656] usbcore: registered new interface driver hub
>[    4.940375] usbcore: registered new device driver usb
>[    4.942381] rtc_cmos 00:02: RTC can wake from S4
>[    4.942827] rtc_cmos 00:02: rtc core: registered rtc_cmos as rtc0
>[    4.942957] rtc_cmos 00:02: alarms up to one month, y3k, 114 bytes nvram, hpet irqs
>[    4.954640] ACPI: AC Adapter [AC] (on-line)
>[    4.956610] Linux agpgart interface v0.103
>[    4.956795] xhci_hcd 0000:00:14.0: xHCI Host Controller
>[    4.957048] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 1
>[    4.957355] xhci_hcd 0000:00:14.0: cache line size of 64 is not supported
>[    4.957510] xhci_hcd 0000:00:14.0: irq 41 for MSI/MSI-X
>[    4.958070] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
>[    4.958161] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
>[    4.958254] usb usb1: Product: xHCI Host Controller
>[    4.958317] usb usb1: Manufacturer: Linux 3.18.0-00343-gfc7bddc-dirty xhci-hcd
>[    4.958401] usb usb1: SerialNumber: 0000:00:14.0
>[    4.960165] hub 1-0:1.0: USB hub found
>[    4.960368] hub 1-0:1.0: 9 ports detected
>[    4.962006] Non-volatile memory driver v1.3
>[    4.966677] xhci_hcd 0000:00:14.0: xHCI Host Controller
>[    4.966777] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 2
>[    4.967478] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003
>[    4.967587] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
>[    4.967669] usb usb2: Product: xHCI Host Controller
>[    4.967733] usb usb2: Manufacturer: Linux 3.18.0-00343-gfc7bddc-dirty xhci-hcd
>[    4.969626] ACPI: Battery Slot [BAT0] (battery present)
>[    4.969797] usb usb2: SerialNumber: 0000:00:14.0
>[    4.971596] thinkpad_acpi: ThinkPad ACPI Extras v0.25
>[    4.971666] thinkpad_acpi: http://ibm-acpi.sf.net/
>[    4.971756] thinkpad_acpi: ThinkPad BIOS GJET78WW (2.28 ), EC unknown
>[    4.971822] thinkpad_acpi: Lenovo ThinkPad T440s, model 20ARS36E00
>[    4.974163] thinkpad_acpi: Unsupported brightness interface, please contact ibm-acpi-devel@lists.sourceforge.net
>[    4.974282] thinkpad_acpi: radio switch found; radios are enabled
>[    4.974545] thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver
>[    4.974631] thinkpad_acpi: Disabling thinkpad-acpi brightness events by default...
>[    4.976105] [drm] Initialized drm 1.1.0 20060810
>[    4.980926] hub 2-0:1.0: USB hub found
>[    4.981078] hub 2-0:1.0: 4 ports detected
>[    4.986597] ACPI: Battery Slot [BAT1] (battery present)
>[    4.991806] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked
>[    4.992607] thinkpad_acpi: rfkill switch tpacpi_wwan_sw: radio is unblocked
>[    4.994372] snd_hda_intel 0000:00:1b.0: irq 42 for MSI/MSI-X
>[    4.997408] thinkpad_acpi: Console audio control enabled, mode: monitor (read only)
>[    5.001940] input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input6
>[    5.019114] thermal LNXTHERM:00: registered as thermal_zone0
>[    5.019182] ACPI: Thermal Zone [THM0] (44 C)
>[    5.020373] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
>[    5.024782] ehci-pci: EHCI PCI platform driver
>[    5.025174] ehci-pci 0000:00:1d.0: EHCI Host Controller
>[    5.025261] ehci-pci 0000:00:1d.0: new USB bus registered, assigned bus number 3
>[    5.025361] ehci-pci 0000:00:1d.0: debug port 2
>[    5.029388] ehci-pci 0000:00:1d.0: cache line size of 64 is not supported
>[    5.029494] ehci-pci 0000:00:1d.0: irq 23, io mem 0xf063d000
>[    5.031452] microcode: CPU0 sig=0x40651, pf=0x40, revision=0x1c
>[    5.035717] microcode: CPU1 sig=0x40651, pf=0x40, revision=0x1c
>[    5.035920] microcode: CPU2 sig=0x40651, pf=0x40, revision=0x1c
>[    5.036051] microcode: CPU3 sig=0x40651, pf=0x40, revision=0x1c
>[    5.037498] microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba
>[    5.039724] ehci-pci 0000:00:1d.0: USB 2.0 started, EHCI 1.00
>[    5.040031] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002
>[    5.040099] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
>[    5.040179] usb usb3: Product: EHCI Host Controller
>[    5.040241] usb usb3: Manufacturer: Linux 3.18.0-00343-gfc7bddc-dirty ehci_hcd
>[    5.040322] usb usb3: SerialNumber: 0000:00:1d.0
>[    5.041824] hub 3-0:1.0: USB hub found
>[    5.041916] hub 3-0:1.0: 3 ports detected
>[    5.047050] [drm:i915_dump_device_info] i915 device info: gen=7, pciid=0x0a16 rev=0x0b flags=is_mobile,need_gfx_hws,is_haswell,has_fbc,has_hotplug,has_llc,has_ddi,has_fpga_dbg,
>[    5.047206] [drm:intel_detect_pch] Found LynxPoint LP PCH
>[    5.047580] [drm] Memory usable by graphics device = 2048M
>[    5.047645] [drm:i915_gem_gtt_init] GMADR size = 256M
>[    5.047707] [drm:i915_gem_gtt_init] GTT stolen size = 32M
>[    5.047770] [drm:i915_gem_gtt_init] ppgtt mode: 1
>[    5.047867] [drm] Replacing VGA console driver
>[    5.049231] Console: switching to colour dummy device 80x25
>[    5.052944] sound hdaudioC1D0: autoconfig: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:speaker
>[    5.052952] sound hdaudioC1D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
>[    5.052956] sound hdaudioC1D0:    hp_outs=1 (0x15/0x0/0x0/0x0/0x0)
>[    5.052960] sound hdaudioC1D0:    mono: mono_out=0x0
>[    5.052964] sound hdaudioC1D0:    inputs:
>[    5.052968] sound hdaudioC1D0:      Mic=0x1a
>[    5.052971] sound hdaudioC1D0:      Internal Mic=0x12
>[    5.054445] [drm:intel_opregion_setup] graphic opregion physical addr: 0xdce45018
>[    5.054459] [drm:intel_opregion_setup] Public ACPI methods supported
>[    5.054463] [drm:intel_opregion_setup] SWSCI supported
>[    5.072878] [drm:swsci_setup] SWSCI BIOS requested (00200383) SBCB callbacks that are not supported (02200705)
>[    5.072882] [drm:swsci_setup] SWSCI GBDA callbacks 00000483, SBCB callbacks 00200383
>[    5.072885] [drm:intel_opregion_setup] ASLE supported
>[    5.073101] i915 0000:00:02.0: irq 43 for MSI/MSI-X
>[    5.073126] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
>[    5.073129] [drm] Driver supports precise vblank timestamp query.
>[    5.073134] [drm:init_vbt_defaults] Set default to SSC at 120000 kHz
>[    5.073138] [drm:validate_vbt] Using VBT from OpRegion: $VBT HASWELL        d
>[    5.073143] [drm:parse_general_features] BDB_GENERAL_FEATURES int_tv_support 0 int_crt_support 0 lvds_use_ssc 1 lvds_ssc_freq 120000 display_clock_mode 0 fdi_rx_polarity_inverted 0
>[    5.073149] [drm:parse_general_definitions] crt_ddc_bus_pin: 2
>[    5.073153] [drm:parse_lfp_panel_data] DRRS supported mode is static
>[    5.073157] [drm:parse_lfp_panel_data] Found panel mode in BIOS VBT tables:
>[    5.073162] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 0 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x8 0xa
>[    5.073167] [drm:parse_lfp_panel_data] VBT initial LVDS value 30033c
>[    5.073171] [drm:parse_lfp_backlight] VBT backlight PWM modulation frequency 220 Hz, active high, min brightness 3, level 255
>[    5.073176] [drm:parse_sdvo_panel_data] Found SDVO panel mode in BIOS VBT tables:
>[    5.073182] [drm:drm_mode_debug_printmodeline] Modeline 0:"1600x1200" 0 162000 1600 1664 1856 2160 1200 1201 1204 1250 0x8 0xa
>[    5.073188] [drm:parse_sdvo_device_mapping] No SDVO device info is found in VBT
>[    5.073192] [drm:parse_driver_features] DRRS State Enabled:1
>[    5.073195] [drm:parse_ddi_port] Port A VBT info: DP:1 HDMI:0 DVI:0 EDP:1 CRT:0
>[    5.073198] [drm:parse_ddi_port] VBT HDMI level shift for port A: 0
>[    5.073200] [drm:parse_ddi_port] Port B VBT info: DP:1 HDMI:1 DVI:1 EDP:0 CRT:0
>[    5.073202] [drm:parse_ddi_port] VBT HDMI level shift for port B: 1
>[    5.073204] [drm:parse_ddi_port] Port C VBT info: DP:1 HDMI:1 DVI:1 EDP:0 CRT:0
>[    5.073206] [drm:parse_ddi_port] VBT HDMI level shift for port C: 1
>[    5.073232] [drm:intel_dsm_pci_probe] no _DSM method for intel device
>[    5.073253] [drm:i915_gem_init_stolen] found 33554432 bytes of stolen memory at dda00000
>[    5.073288] [drm:intel_display_power_get] enabling always-on
>[    5.073290] [drm:intel_display_power_get] enabling display
>[    5.073515] [drm:intel_print_wm_latency] Primary WM0 latency 20 (2.0 usec)
>[    5.073518] [drm:intel_print_wm_latency] Primary WM1 latency 4 (2.0 usec)
>[    5.073520] [drm:intel_print_wm_latency] Primary WM2 latency 36 (18.0 usec)
>[    5.073522] [drm:intel_print_wm_latency] Primary WM3 latency 90 (45.0 usec)
>[    5.073524] [drm:intel_print_wm_latency] Primary WM4 latency 160 (80.0 usec)
>[    5.073526] [drm:intel_print_wm_latency] Sprite WM0 latency 20 (2.0 usec)
>[    5.073528] [drm:intel_print_wm_latency] Sprite WM1 latency 4 (2.0 usec)
>[    5.073530] [drm:intel_print_wm_latency] Sprite WM2 latency 36 (18.0 usec)
>[    5.073532] [drm:intel_print_wm_latency] Sprite WM3 latency 90 (45.0 usec)
>[    5.073534] [drm:intel_print_wm_latency] Sprite WM4 latency 160 (80.0 usec)
>[    5.073536] [drm:intel_print_wm_latency] Cursor WM0 latency 20 (2.0 usec)
>[    5.073538] [drm:intel_print_wm_latency] Cursor WM1 latency 4 (2.0 usec)
>[    5.073540] [drm:intel_print_wm_latency] Cursor WM2 latency 36 (18.0 usec)
>[    5.073542] [drm:intel_print_wm_latency] Cursor WM3 latency 90 (45.0 usec)
>[    5.073544] [drm:intel_print_wm_latency] Cursor WM4 latency 160 (80.0 usec)
>[    5.073548] [drm:intel_modeset_init] 3 display pipes available.
>[    5.073573] [drm:intel_ddi_pll_init] CDCLK running at 450000KHz
>[    5.073579] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
>[    5.073911] [drm:intel_dp_init_connector] Adding eDP connector on port A
>[    5.074109] [drm:intel_dp_init_panel_power_sequencer] cur t1_t3 2000 t8 0 t9 2000 t10 500 t11_t12 6000
>[    5.074113] [drm:intel_dp_init_panel_power_sequencer] vbt t1_t3 2000 t8 10 t9 2000 t10 500 t11_t12 5000
>[    5.074115] [drm:intel_dp_init_panel_power_sequencer] panel power up delay 200, power down delay 50, power cycle delay 600
>[    5.074118] [drm:intel_dp_init_panel_power_sequencer] backlight on delay 1, off delay 200
>[    5.074121] [drm:intel_dp_aux_init] registering DPDDC-A bus for card0-eDP-1
>[    5.074310] [drm:edp_panel_vdd_on] Turning eDP port A VDD on
>[    5.074321] [drm:edp_panel_vdd_on] PP_STATUS: 0x80000008 PP_CONTROL: 0xabcd000f
>[    5.074926] [drm:intel_dp_get_dpcd] DPCD: 11 0a 82 41 00 00 01 80 02 00 00 00 0f 0b 00
>[    5.075275] [drm:intel_dp_get_dpcd] Detected EDP PSR Panel.
>[    5.075290] [drm:intel_dp_init_panel_power_sequencer_registers] panel power sequencer register settings: PP_ON 0x7d00001, PP_OFF 0x1f40001, PP_DIV 0x4af06
>[    5.098403] [drm:drm_edid_to_eld] ELD: no CEA Extension found
>[    5.098412] [drm:intel_dp_drrs_init] VBT doesn't support DRRS
>[    5.098489] [drm:intel_panel_setup_backlight] Connector eDP-1 backlight initialized, enabled, brightness 851/851
>[    5.098519] [drm:intel_dp_init_connector] Adding DP connector on port B
>[    5.098540] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11
>[    5.098584] iTCO_wdt: Found a Lynx Point_LP TCO device (Version=2, TCOBASE=0x1860)
>[    5.099421] [drm:intel_dp_aux_init] registering DPDDC-B bus for card0-DP-1
>[    5.099700] iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
>[    5.099957] [drm:intel_dp_init_connector] Adding DP connector on port C
>[    5.102731] [drm:intel_dp_aux_init] registering DPDDC-C bus for card0-DP-2
>[    5.129630] [drm:intel_modeset_readout_hw_state] [CRTC:8] hw state readout: enabled
>[    5.129641] [drm:intel_modeset_readout_hw_state] [CRTC:12] hw state readout: disabled
>[    5.129647] [drm:intel_modeset_readout_hw_state] [CRTC:16] hw state readout: disabled
>[    5.129653] [drm:intel_modeset_readout_hw_state] WRPLL 1 hw state readout: crtc_mask 0x00000001, on 1
>[    5.129672] [drm:intel_modeset_readout_hw_state] WRPLL 2 hw state readout: crtc_mask 0x00000000, on 0
>[    5.129685] [drm:intel_modeset_readout_hw_state] [ENCODER:18:TMDS-18] hw state readout: enabled, pipe A
>[    5.129690] [drm:intel_modeset_readout_hw_state] [ENCODER:26:TMDS-26] hw state readout: disabled, pipe A
>[    5.129694] [drm:intel_modeset_readout_hw_state] [ENCODER:28:DP MST-28] hw state readout: disabled, pipe A
>[    5.129698] [drm:intel_modeset_readout_hw_state] [ENCODER:29:DP MST-29] hw state readout: disabled, pipe B
>[    5.129701] [drm:intel_modeset_readout_hw_state] [ENCODER:30:DP MST-30] hw state readout: disabled, pipe C
>[    5.129706] [drm:intel_modeset_readout_hw_state] [ENCODER:33:TMDS-33] hw state readout: disabled, pipe A
>[    5.129710] [drm:intel_modeset_readout_hw_state] [ENCODER:35:DP MST-35] hw state readout: disabled, pipe A
>[    5.129714] [drm:intel_modeset_readout_hw_state] [ENCODER:36:DP MST-36] hw state readout: disabled, pipe B
>[    5.129717] [drm:intel_modeset_readout_hw_state] [ENCODER:37:DP MST-37] hw state readout: disabled, pipe C
>[    5.129724] [drm:intel_modeset_readout_hw_state] [CONNECTOR:19:eDP-1] hw state readout: enabled
>[    5.129729] [drm:intel_modeset_readout_hw_state] [CONNECTOR:27:DP-1] hw state readout: disabled
>[    5.129734] [drm:intel_modeset_readout_hw_state] [CONNECTOR:31:HDMI-A-1] hw state readout: disabled
>[    5.129739] [drm:intel_modeset_readout_hw_state] [CONNECTOR:34:DP-2] hw state readout: disabled
>[    5.129744] [drm:intel_modeset_readout_hw_state] [CONNECTOR:38:HDMI-A-2] hw state readout: disabled
>[    5.129810] [drm:intel_dump_pipe_config] [CRTC:8][setup_hw_state] config for pipe A
>[    5.129813] [drm:intel_dump_pipe_config] cpu_transcoder: D
>[    5.129816] [drm:intel_dump_pipe_config] pipe bpp: 18, dithering: 0
>[    5.129819] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[    5.129823] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 4940610, gmch_n: 8388608, link_m: 274478, link_n: 524288, tu: 64
>[    5.129827] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[    5.129831] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[    5.129833] [drm:intel_dump_pipe_config] requested mode:
>[    5.129837] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 720 0 0 0 400 0 0 0 0x0 0x0
>[    5.129840] [drm:intel_dump_pipe_config] adjusted mode:
>[    5.129844] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0 0 0 0x0 0x5
>[    5.129848] [drm:intel_dump_crtc_timings] crtc timings: 141351 1920 1936 1952 2104 1080 1083 1097 1116, type: 0x0 flags: 0x5
>[    5.129852] [drm:intel_dump_pipe_config] port clock: 270000
>[    5.129854] [drm:intel_dump_pipe_config] pipe src size: 720x400
>[    5.129857] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[    5.129861] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x07800438, enabled
>[    5.129864] [drm:intel_dump_pipe_config] ips: 0
>[    5.129867] [drm:intel_dump_pipe_config] double wide: 0
>[    5.129941] [drm:i915_get_vblank_timestamp] crtc 1 is disabled
>[    5.129956] [drm:gm45_get_vblank_counter] trying to get vblank count for disabled pipe B
>[    5.129959] [drm:i915_get_vblank_timestamp] crtc 1 is disabled
>[    5.129962] [drm:gm45_get_vblank_counter] trying to get vblank count for disabled pipe B
>[    5.129994] [drm:intel_dump_pipe_config] [CRTC:12][setup_hw_state] config for pipe B
>[    5.129997] [drm:intel_dump_pipe_config] cpu_transcoder: B
>[    5.130000] [drm:intel_dump_pipe_config] pipe bpp: 0, dithering: 0
>[    5.130003] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[    5.130007] [drm:intel_dump_pipe_config] dp: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[    5.130011] [drm:intel_dump_pipe_config] dp: 0, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[    5.130014] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[    5.130016] [drm:intel_dump_pipe_config] requested mode:
>[    5.130020] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0 0 0 0x0 0x0
>[    5.130023] [drm:intel_dump_pipe_config] adjusted mode:
>[    5.130026] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0 0 0 0x0 0x0
>[    5.130030] [drm:intel_dump_crtc_timings] crtc timings: 0 0 0 0 0 0 0 0 0, type: 0x0 flags: 0x0
>[    5.130033] [drm:intel_dump_pipe_config] port clock: 0
>[    5.130035] [drm:intel_dump_pipe_config] pipe src size: 0x0
>[    5.130038] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[    5.130042] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[    5.130045] [drm:intel_dump_pipe_config] ips: 0
>[    5.130047] [drm:intel_dump_pipe_config] double wide: 0
>[    5.130052] [drm:i915_get_vblank_timestamp] crtc 2 is disabled
>[    5.130055] [drm:gm45_get_vblank_counter] trying to get vblank count for disabled pipe C
>[    5.130058] [drm:i915_get_vblank_timestamp] crtc 2 is disabled
>[    5.130061] [drm:gm45_get_vblank_counter] trying to get vblank count for disabled pipe C
>[    5.130065] [drm:intel_dump_pipe_config] [CRTC:16][setup_hw_state] config for pipe C
>[    5.130068] [drm:intel_dump_pipe_config] cpu_transcoder: C
>[    5.130070] [drm:intel_dump_pipe_config] pipe bpp: 0, dithering: 0
>[    5.130073] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[    5.130077] [drm:intel_dump_pipe_config] dp: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[    5.130081] [drm:intel_dump_pipe_config] dp: 0, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[    5.130084] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[    5.130087] [drm:intel_dump_pipe_config] requested mode:
>[    5.130090] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0 0 0 0x0 0x0
>[    5.130093] [drm:intel_dump_pipe_config] adjusted mode:
>[    5.130096] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0 0 0 0x0 0x0
>[    5.130100] [drm:intel_dump_crtc_timings] crtc timings: 0 0 0 0 0 0 0 0 0, type: 0x0 flags: 0x0
>[    5.130103] [drm:intel_dump_pipe_config] port clock: 0
>[    5.130105] [drm:intel_dump_pipe_config] pipe src size: 0x0
>[    5.130108] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[    5.130112] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[    5.130115] [drm:intel_dump_pipe_config] ips: 0
>[    5.130117] [drm:intel_dump_pipe_config] double wide: 0
>[    5.130130] [drm:intel_connector_check_state] [CONNECTOR:19:eDP-1]
>[    5.130140] [drm:check_encoder_state] [ENCODER:18:TMDS-18]
>[    5.130145] [drm:check_encoder_state] [ENCODER:26:TMDS-26]
>[    5.130149] [drm:check_encoder_state] [ENCODER:28:DP MST-28]
>[    5.130151] [drm:check_encoder_state] [ENCODER:29:DP MST-29]
>[    5.130154] [drm:check_encoder_state] [ENCODER:30:DP MST-30]
>[    5.130156] [drm:check_encoder_state] [ENCODER:33:TMDS-33]
>[    5.130160] [drm:check_encoder_state] [ENCODER:35:DP MST-35]
>[    5.130162] [drm:check_encoder_state] [ENCODER:36:DP MST-36]
>[    5.130165] [drm:check_encoder_state] [ENCODER:37:DP MST-37]
>[    5.130167] [drm:check_crtc_state] [CRTC:8]
>[    5.130186] [drm:check_crtc_state] [CRTC:12]
>[    5.130190] [drm:check_crtc_state] [CRTC:16]
>[    5.130194] [drm:check_shared_dpll_state] WRPLL 1
>[    5.130198] [drm:check_shared_dpll_state] WRPLL 2
>[    5.130210] [drm:ironlake_get_plane_config] pipe/plane 0/0 with fb: size=720x400@32, offset=0, pitch 2560, size 0xfa000
>[    5.130215] [drm:i915_gem_object_create_stolen_for_preallocated] creating preallocated stolen object: stolen_offset=0, gtt_offset=0, size=fa000
>[    5.130269] [drm:i915_pages_create_for_stolen] offset=0x0, size=1024000
>[    5.130368] [drm:intel_alloc_plane_obj] plane fb obj ffff8800c9a6e4c0
>[    5.130374] [drm:i915_gem_setup_global_gtt] reserving preallocated space: 0 + fa000
>[    5.130377] [drm:i915_gem_setup_global_gtt] clearing unused GTT space: [fa000, 7ffff000]
>[    5.132008] [drm:gen6_ppgtt_init] Allocated pde space (2M) at GTT entry: 7fdf0
>[    5.132169] [drm:i915_gem_context_init] HW context support initialized
>[    5.132178] [drm:init_status_page] render ring hws offset: 0x0010b000
>[    5.132265] [drm:intel_init_pipe_control] render ring pipe control offset: 0x0012c000
>[    5.132274] [drm:init_status_page] bsd ring hws offset: 0x0012d000
>[    5.132337] [drm:init_status_page] blitter ring hws offset: 0x0014e000
>[    5.132399] [drm:init_status_page] video enhancement ring hws offset: 0x0016f000
>[    5.136908] [drm:intel_backlight_device_register] Connector eDP-1 backlight sysfs interface registered
>[    5.137026] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:19:eDP-1]
>[    5.137033] [drm:intel_dp_detect] [CONNECTOR:19:eDP-1]
>[    5.137491] [drm:intel_dp_probe_oui] Sink OUI: 001cf8
>[    5.137830] [drm:intel_dp_probe_oui] Branch OUI: 000000
>[    5.137845] [drm:drm_edid_to_eld] ELD: no CEA Extension found
>[    5.137850] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:19:eDP-1] probed modes :
>[    5.137855] [drm:drm_mode_debug_printmodeline] Modeline 20:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[    5.137859] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:DP-1]
>[    5.137862] [drm:intel_dp_detect] [CONNECTOR:27:DP-1]
>[    5.137874] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:DP-1] disconnected
>[    5.137877] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:31:HDMI-A-1]
>[    5.137881] [drm:intel_hdmi_detect] [CONNECTOR:31:HDMI-A-1]
>[    5.154029] ACPI: Video Device [VID] (multi-head: yes  rom: no  post: no)
>[    5.154404] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input8
>[    5.154819] [drm] Initialized i915 1.6.0 20141205 for 0000:00:02.0 on minor 0
>[    5.192957] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 5
>[    5.206180] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[    5.206186] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:31:HDMI-A-1] disconnected
>[    5.206191] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:34:DP-2]
>[    5.206194] [drm:intel_dp_detect] [CONNECTOR:34:DP-2]
>[    5.206698] [drm:intel_dp_get_dpcd] DPCD: 12 14 c4 01 00 15 01 83 02 00 00 00 00 00 04
>[    5.206702] [drm:intel_dp_get_dpcd] Displayport TPS3 supported
>[    5.207917] [drm:intel_dp_probe_oui] Sink OUI: 000000
>[    5.208283] [drm:intel_dp_probe_oui] Branch OUI: 90cc24
>[    5.208625] [drm:intel_dp_probe_mst] Sink is MST capable
>[    5.210690] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:34:DP-2] disconnected
>[    5.210694] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:38:HDMI-A-2]
>[    5.210697] [drm:intel_hdmi_detect] [CONNECTOR:38:HDMI-A-2]
>[    5.210879] [drm:gmbus_xfer] GMBUS [i915 gmbus dpc] NAK for addr: 0050 r(1)
>[    5.210884] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpc
>[    5.210889] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:38:HDMI-A-2] disconnected
>[    5.210894] [drm:drm_setup_crtcs] 
>[    5.210898] [drm:drm_enable_connectors] connector 19 enabled? yes
>[    5.210901] [drm:drm_enable_connectors] connector 27 enabled? no
>[    5.210904] [drm:drm_enable_connectors] connector 31 enabled? no
>[    5.210907] [drm:drm_enable_connectors] connector 34 enabled? no
>[    5.210910] [drm:drm_enable_connectors] connector 38 enabled? no
>[    5.210914] [drm:intel_fb_initial_config] looking for cmdline mode on connector eDP-1
>[    5.210917] [drm:intel_fb_initial_config] looking for preferred mode on connector eDP-1
>[    5.210922] [drm:intel_fb_initial_config] connector eDP-1 on pipe A [CRTC:8]: 1920x1080
>[    5.210926] [drm:intel_fb_initial_config] connector DP-1 not enabled, skipping
>[    5.210929] [drm:intel_fb_initial_config] connector HDMI-A-1 not enabled, skipping
>[    5.210933] [drm:intel_fb_initial_config] connector DP-2 not enabled, skipping
>[    5.210936] [drm:intel_fb_initial_config] connector HDMI-A-2 not enabled, skipping
>[    5.210940] [drm:drm_setup_crtcs] desired mode 1920x1080 set on crtc 8
>[    5.210961] [drm:intelfb_create] no BIOS fb, allocating a new one
>[    5.210964] [drm:i915_gem_object_create_stolen] creating stolen object: size=7e9000
>[    5.210971] [drm:i915_pages_create_for_stolen] offset=0xfa000, size=8294400
>[    5.211588] [drm:intelfb_create] allocated 1920x1080 fb: 0x00191000, bo ffff88030c28e140
>[    5.212019] fbcon: inteldrmfb (fb0) is primary device
>[    5.212247] [drm:intel_crtc_set_config] [CRTC:8] [FB:41] #connectors=1 (x y) (0 0)
>[    5.212249] [drm:intel_set_config_compute_mode_changes] modes are different, full mode set
>[    5.212251] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0 0 0 0x0 0x0
>[    5.212253] [drm:drm_mode_debug_printmodeline] Modeline 40:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[    5.212253] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:8], mode_changed=1, fb_changed=1
>[    5.212254] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[    5.212256] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 1, prepare: 1, disable: 0
>[    5.212257] [drm:connected_sink_compute_bpp] [CONNECTOR:19:eDP-1] checking for sink bpp constrains
>[    5.212258] [drm:connected_sink_compute_bpp] clamping display bpp (was 24) to EDID reported max of 18
>[    5.212260] [drm:intel_dp_compute_config] DP link computation with max lane count 2 max bw 0a pixel clock 141000KHz
>[    5.212261] [drm:intel_dp_compute_config] DP link bw 0a lane count 2 clock 270000 bpp 18
>[    5.212261] [drm:intel_dp_compute_config] DP link bw required 253800 available 432000
>[    5.212263] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 18, dithering: 1
>[    5.212264] [drm:intel_dump_pipe_config] [CRTC:8][modeset] config for pipe A
>[    5.212264] [drm:intel_dump_pipe_config] cpu_transcoder: D
>[    5.212265] [drm:intel_dump_pipe_config] pipe bpp: 18, dithering: 1
>[    5.212266] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[    5.212267] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 4928307, gmch_n: 8388608, link_m: 273794, link_n: 524288, tu: 64
>[    5.212267] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[    5.212268] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[    5.212268] [drm:intel_dump_pipe_config] requested mode:
>[    5.212270] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[    5.212270] [drm:intel_dump_pipe_config] adjusted mode:
>[    5.212271] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[    5.212272] [drm:intel_dump_crtc_timings] crtc timings: 141000 1920 1936 1952 2104 1080 1083 1097 1116, type: 0x48 flags: 0xa
>[    5.212273] [drm:intel_dump_pipe_config] port clock: 270000
>[    5.212274] [drm:intel_dump_pipe_config] pipe src size: 1920x1080
>[    5.212274] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[    5.212275] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[    5.212275] [drm:intel_dump_pipe_config] ips: 1
>[    5.212276] [drm:intel_dump_pipe_config] double wide: 0
>[    5.212404] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    5.212411] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    5.212468] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    5.213060] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    5.214843] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    5.214844] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    5.215584] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    5.215585] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    5.215595] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    5.216087] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    5.216268] [drm:intel_edp_backlight_off] 
>[    5.217241] [drm:drm_dp_send_link_address] link address reply: 4
>[    5.217243] [drm:drm_dp_send_link_address] port 0: input 1, pdt: 1, pn: 0, dpcd_rev: 00, mcs: 1, ddps: 1, ldps 0, sdp 0/0
>[    5.217245] [drm:drm_dp_send_link_address] port 1: input 0, pdt: 0, pn: 1, dpcd_rev: 00, mcs: 0, ddps: 0, ldps 0, sdp 0/0
>[    5.217247] [drm:drm_dp_send_link_address] port 2: input 0, pdt: 2, pn: 2, dpcd_rev: 12, mcs: 1, ddps: 1, ldps 0, sdp 0/0
>[    5.217249] [drm:drm_dp_send_link_address] port 3: input 0, pdt: 4, pn: 3, dpcd_rev: 00, mcs: 0, ddps: 1, ldps 1, sdp 1/1
>[    5.217874] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    5.217875] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    5.299842] usb 2-3: new SuperSpeed USB device number 2 using xhci_hcd
>[    5.315317] usb 2-3: New USB device found, idVendor=17ef, idProduct=1012
>[    5.315319] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
>[    5.315320] usb 2-3: Product: Lenovo ThinkPad Dock   
>[    5.315321] usb 2-3: Manufacturer: LENOVO                 
>[    5.316387] hub 2-3:1.0: USB hub found
>[    5.316681] hub 2-3:1.0: 4 ports detected
>[    5.329581] usb 1-3: new high-speed USB device number 2 using xhci_hcd
>[    5.346214] usb 3-1: new high-speed USB device number 2 using ehci-pci
>[    5.419508] [drm:intel_panel_actually_set_backlight] set backlight PWM = 0
>[    5.426518] [drm:edp_panel_off] Turn eDP port A panel power off
>[    5.426523] [drm:wait_panel_off] Wait for panel power off time
>[    5.426527] [drm:wait_panel_status] mask b0000000 value 00000000 status 80000008 control abcd0000
>[    5.470029] usb 3-1: New USB device found, idVendor=8087, idProduct=8000
>[    5.470031] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
>[    5.471082] hub 3-1:1.0: USB hub found
>[    5.471280] hub 3-1:1.0: 8 ports detected
>[    5.479449] [drm:wait_panel_status] Wait complete
>[    5.479466] [drm:intel_update_fbc] no output, disabling
>[    5.479468] [drm:intel_disable_shared_dpll] disable WRPLL 1 (active 1, on? 1) for crtc 8
>[    5.479470] [drm:intel_disable_shared_dpll] disabling WRPLL 1
>[    5.479481] [drm:intel_display_power_put] disabling display
>[    5.479487] [drm:hsw_set_power_well] Requesting to disable the power well
>[    5.479542] [drm:edp_panel_on] Turn eDP port A panel power on
>[    5.479544] [drm:wait_panel_power_cycle] Wait for panel power cycle
>[    5.505284] usb 1-3: New USB device found, idVendor=17ef, idProduct=1012
>[    5.505286] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
>[    5.505287] usb 1-3: Product: Lenovo ThinkPad Dock   
>[    5.505288] usb 1-3: Manufacturer: LENOVO                 
>[    5.506175] hub 1-3:1.0: USB hub found
>[    5.506459] hub 1-3:1.0: 4 ports detected
>[    5.672789] usb 1-4: new high-speed USB device number 3 using xhci_hcd
>[    5.739601] usb 3-1.5: new full-speed USB device number 3 using ehci-pci
>[    5.824326] usb 3-1.5: No LPM exit latency info found, disabling LPM.
>[    5.833666] usb 3-1.5: New USB device found, idVendor=058f, idProduct=9540
>[    5.833668] usb 3-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
>[    5.833669] usb 3-1.5: Product: EMV Smartcard Reader
>[    5.833670] usb 3-1.5: Manufacturer: Generic
>[    5.853450] usb 1-4: New USB device found, idVendor=1199, idProduct=a001
>[    5.853452] usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
>[    5.853453] usb 1-4: Product: Sierra Wireless EM7345 4G LTE
>[    5.853454] usb 1-4: Manufacturer: Sierra Wireless Inc.
>[    5.853455] usb 1-4: SerialNumber: 013937002544342
>[    5.861713] psmouse serio1: synaptics: Touchpad model: 1, fw: 8.1, id: 0x1e2b1, caps: 0xd001a3/0x940300/0x12e800, board id: 2962, fw id: 2560
>[    5.861720] psmouse serio1: synaptics: serio: Synaptics pass-through port at isa0060/serio1/input0
>[    5.901945] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input7
>[    5.926192] usb 1-3.4: new high-speed USB device number 4 using xhci_hcd
>[    6.019712] usb 1-3.4: New USB device found, idVendor=17ef, idProduct=1011
>[    6.019714] usb 1-3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
>[    6.019715] usb 1-3.4: Product: Lenovo ThinkPad Dock
>[    6.019716] usb 1-3.4: Manufacturer: Lenovo
>[    6.019717] usb 1-3.4: SerialNumber: Rev1.2
>[    6.020509] hub 1-3.4:1.0: USB hub found
>[    6.020542] hub 1-3.4:1.0: 3 ports detected
>[    6.029291] [drm:wait_panel_status] mask b800000f value 00000000 status 00000000 control abcd0000
>[    6.029293] [drm:wait_panel_status] Wait complete
>[    6.029298] [drm:wait_panel_on] Wait for panel power on
>[    6.029302] [drm:wait_panel_status] mask b000000f value 80000008 status 0000000a control abcd0003
>[    6.179263] usb 1-7: new full-speed USB device number 5 using xhci_hcd
>[    6.242537] [drm:wait_panel_status] Wait complete
>[    6.242561] [drm:edp_panel_vdd_on] Turning eDP port A VDD on
>[    6.242571] [drm:edp_panel_vdd_on] PP_STATUS: 0x80000008 PP_CONTROL: 0xabcd000b
>[    6.243746] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[    6.244387] [drm:intel_dp_start_link_train] clock recovery OK
>[    6.245323] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training successful
>[    6.245635] [drm:intel_edp_backlight_on] 
>[    6.245636] [drm:intel_panel_enable_backlight] pipe A
>[    6.245640] [drm:intel_panel_actually_set_backlight] set backlight PWM = 851
>[    6.249157] [drm:intel_psr_match_conditions] PSR disable by flag
>[    6.255884] [drm:ironlake_update_primary_plane] Writing base 00191000 00000000 0 0 7680
>[    6.279195] [drm:intel_update_fbc] disabled per chip default
>[    6.279210] [drm:intel_connector_check_state] [CONNECTOR:19:eDP-1]
>[    6.279222] [drm:check_encoder_state] [ENCODER:18:TMDS-18]
>[    6.279225] [drm:check_encoder_state] [ENCODER:26:TMDS-26]
>[    6.279227] [drm:check_encoder_state] [ENCODER:28:DP MST-28]
>[    6.279228] [drm:check_encoder_state] [ENCODER:29:DP MST-29]
>[    6.279228] [drm:check_encoder_state] [ENCODER:30:DP MST-30]
>[    6.279229] [drm:check_encoder_state] [ENCODER:33:TMDS-33]
>[    6.279231] [drm:check_encoder_state] [ENCODER:35:DP MST-35]
>[    6.279232] [drm:check_encoder_state] [ENCODER:36:DP MST-36]
>[    6.279233] [drm:check_encoder_state] [ENCODER:37:DP MST-37]
>[    6.279234] [drm:check_crtc_state] [CRTC:8]
>[    6.279253] [drm:check_crtc_state] [CRTC:12]
>[    6.279255] [drm:check_crtc_state] [CRTC:16]
>[    6.279257] [drm:check_shared_dpll_state] WRPLL 1
>[    6.279259] [drm:check_shared_dpll_state] WRPLL 2
>[    6.279370] [drm:intel_crtc_set_config] [CRTC:12] [NOFB]
>[    6.279373] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:12], mode_changed=0, fb_changed=0
>[    6.279375] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[    6.279377] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 0, prepare: 0, disable: 0
>[    6.279379] [drm:intel_crtc_set_config] [CRTC:16] [NOFB]
>[    6.279381] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:16], mode_changed=0, fb_changed=0
>[    6.279382] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[    6.279383] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 0, prepare: 0, disable: 0
>[    6.279557] Console: switching to colour frame buffer device 240x67
>[    6.279571] [drm:intel_crtc_set_config] [CRTC:8] [FB:41] #connectors=1 (x y) (0 0)
>[    6.279573] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:8], mode_changed=0, fb_changed=0
>[    6.279574] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[    6.279575] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 1, prepare: 1, disable: 0
>[    6.279577] [drm:connected_sink_compute_bpp] [CONNECTOR:19:eDP-1] checking for sink bpp constrains
>[    6.279578] [drm:connected_sink_compute_bpp] clamping display bpp (was 24) to EDID reported max of 18
>[    6.279581] [drm:intel_dp_compute_config] DP link computation with max lane count 2 max bw 0a pixel clock 141000KHz
>[    6.279582] [drm:intel_dp_compute_config] DP link bw 0a lane count 2 clock 270000 bpp 18
>[    6.279583] [drm:intel_dp_compute_config] DP link bw required 253800 available 432000
>[    6.279585] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 18, dithering: 1
>[    6.279586] [drm:intel_dump_pipe_config] [CRTC:8][modeset] config for pipe A
>[    6.279587] [drm:intel_dump_pipe_config] cpu_transcoder: D
>[    6.279588] [drm:intel_dump_pipe_config] pipe bpp: 18, dithering: 1
>[    6.279589] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[    6.279590] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 4928307, gmch_n: 8388608, link_m: 273794, link_n: 524288, tu: 64
>[    6.279591] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[    6.279592] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[    6.279593] [drm:intel_dump_pipe_config] requested mode:
>[    6.279595] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[    6.279596] [drm:intel_dump_pipe_config] adjusted mode:
>[    6.279597] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[    6.279599] [drm:intel_dump_crtc_timings] crtc timings: 141000 1920 1936 1952 2104 1080 1083 1097 1116, type: 0x48 flags: 0xa
>[    6.279600] [drm:intel_dump_pipe_config] port clock: 270000
>[    6.279601] [drm:intel_dump_pipe_config] pipe src size: 1920x1080
>[    6.279602] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[    6.279603] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[    6.279603] [drm:intel_dump_pipe_config] ips: 1
>[    6.279604] [drm:intel_dump_pipe_config] double wide: 0
>[    6.283240] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.283242] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.283272] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.283763] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.284828] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.284830] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.286006] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.286007] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.286018] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.286517] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.286884] [drm:drm_dp_send_enum_path_resources] enum path resources 2: 2560 2560
>[    6.287663] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.287664] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.301770] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.301771] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.301781] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.304172] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.310884] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.310885] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.314259] [drm:intel_dp_check_mst_status] got esi2 02 10 00
>[    6.314261] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.317606] [drm:drm_dp_send_link_address] link address reply: 3
>[    6.317608] [drm:drm_dp_send_link_address] port 0: input 1, pdt: 1, pn: 0, dpcd_rev: 00, mcs: 1, ddps: 1, ldps 0, sdp 0/0
>[    6.317610] [drm:drm_dp_send_link_address] port 1: input 0, pdt: 3, pn: 8, dpcd_rev: 12, mcs: 0, ddps: 1, ldps 0, sdp 1/2
>[    6.317611] [drm:drm_dp_send_link_address] port 2: input 0, pdt: 0, pn: 1, dpcd_rev: 00, mcs: 0, ddps: 0, ldps 0, sdp 0/0
>[    6.322499] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.322501] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.322506] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.327306] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.329219] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.329220] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.329231] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.331819] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.333375] [drm:drm_dp_send_enum_path_resources] enum path resources 8: 2560 2560
>[    6.333790] [drm:drm_fb_helper_hotplug_event] 
>[    6.333792] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:19:eDP-1]
>[    6.333794] [drm:intel_dp_detect] [CONNECTOR:19:eDP-1]
>[    6.339385] [drm:intel_dp_probe_oui] Sink OUI: 001cf8
>[    6.340684] [drm:intel_print_rc6_info] Enabling RC6 states: RC6 on
>[    6.340694] [drm:gen6_enable_rps] Overclocking supported. Max: 1100MHz, Overclock max: 1100MHz
>[    6.342355] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.342356] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.343973] [drm:intel_dp_probe_oui] Branch OUI: 000000
>[    6.343983] [drm:drm_edid_to_eld] ELD: no CEA Extension found
>[    6.343985] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:19:eDP-1] probed modes :
>[    6.343987] [drm:drm_mode_debug_printmodeline] Modeline 20:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[    6.343988] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:DP-1]
>[    6.343988] [drm:intel_dp_detect] [CONNECTOR:27:DP-1]
>[    6.343992] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:DP-1] disconnected
>[    6.343993] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:31:HDMI-A-1]
>[    6.343994] [drm:intel_hdmi_detect] [CONNECTOR:31:HDMI-A-1]
>[    6.356300] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[    6.356301] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:31:HDMI-A-1] disconnected
>[    6.356302] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:34:DP-2]
>[    6.356303] [drm:intel_dp_detect] [CONNECTOR:34:DP-2]
>[    6.356303] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:34:DP-2] disconnected
>[    6.356304] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:38:HDMI-A-2]
>[    6.356304] [drm:intel_hdmi_detect] [CONNECTOR:38:HDMI-A-2]
>[    6.356487] [drm:gmbus_xfer] GMBUS [i915 gmbus dpc] NAK for addr: 0050 r(1)
>[    6.356488] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpc
>[    6.356490] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:38:HDMI-A-2] disconnected
>[    6.356491] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:39:DP-3]
>[    6.356495] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:39:DP-3] disconnected
>[    6.356495] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:43:DP-4]
>[    6.368533] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.368534] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.368561] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.371164] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.377372] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.377373] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.378820] usb 1-7: New USB device found, idVendor=8087, idProduct=07dc
>[    6.378821] usb 1-7: New USB device strings: Mfr=0, Product=0, SerialNumber=0
>[    6.406440] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.406441] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.406468] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.409724] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.416074] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.416082] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.419222] [drm:intel_dp_check_mst_status] got esi2 02 10 00
>[    6.419223] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.425458] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.425459] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.428770] [drm:intel_dp_check_mst_status] got esi2 02 10 00
>[    6.428772] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.435417] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.435418] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.438764] [drm:intel_dp_check_mst_status] got esi2 02 10 00
>[    6.438765] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.445273] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.445274] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.445278] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.448478] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.476718] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.476719] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.476746] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.478891] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.485302] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.485303] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.488581] [drm:intel_dp_check_mst_status] got esi2 02 10 00
>[    6.488583] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.495169] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.495170] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.498524] [drm:intel_dp_check_mst_status] got esi2 02 10 00
>[    6.498525] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.505202] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.505203] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.508509] [drm:intel_dp_check_mst_status] got esi2 02 10 00
>[    6.508510] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.510217] [drm:drm_edid_to_eld] ELD monitor DELL U2413
>[    6.510218] [drm:drm_edid_to_eld] ELD size 36, SAD count 1
>[    6.510249] [drm:drm_mode_debug_printmodeline] Modeline 48:"1920x1200" 60 154000 1920 1968 2000 2080 1200 1203 1209 1235 0x48 0x9
>[    6.510250] [drm:drm_mode_prune_invalid] Not using 1920x1200 mode 12
>[    6.510253] [drm:drm_mode_debug_printmodeline] Modeline 50:"1920x1080i" 60 74250 1920 2008 2052 2200 1080 1084 1094 1125 0x40 0x15
>[    6.510254] [drm:drm_mode_prune_invalid] Not using 1920x1080i mode 7
>[    6.510256] [drm:drm_mode_debug_printmodeline] Modeline 54:"1600x1200" 0 162000 1600 1664 1856 2160 1200 1201 1204 1250 0x40 0x5
>[    6.510257] [drm:drm_mode_prune_invalid] Not using 1600x1200 mode 12
>[    6.510260] [drm:drm_mode_debug_printmodeline] Modeline 69:"720x480i" 0 13500 720 739 801 858 480 488 494 525 0x40 0x101a
>[    6.510261] [drm:drm_mode_prune_invalid] Not using 720x480i mode 7
>[    6.510263] [drm:drm_mode_debug_printmodeline] Modeline 70:"720x576i" 0 13500 720 732 795 864 576 580 586 625 0x40 0x101a
>[    6.510264] [drm:drm_mode_prune_invalid] Not using 720x576i mode 7
>[    6.510266] [drm:drm_mode_debug_printmodeline] Modeline 75:"1920x1080i" 0 74250 1920 2448 2492 2640 1080 1084 1094 1125 0x40 0x15
>[    6.510267] [drm:drm_mode_prune_invalid] Not using 1920x1080i mode 7
>[    6.510270] [drm:drm_mode_debug_printmodeline] Modeline 81:"1920x1080i" 60 74176 1920 2008 2052 2200 1080 1084 1094 1125 0x40 0x15
>[    6.510271] [drm:drm_mode_prune_invalid] Not using 1920x1080i mode 7
>[    6.510273] [drm:drm_mode_debug_printmodeline] Modeline 90:"720x480i" 60 13513 720 739 801 858 480 488 494 525 0x40 0x101a
>[    6.510274] [drm:drm_mode_prune_invalid] Not using 720x480i mode 7
>[    6.510278] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:43:DP-4] probed modes :
>[    6.510280] [drm:drm_mode_debug_printmodeline] Modeline 49:"1920x1080" 60 148500 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5
>[    6.510282] [drm:drm_mode_debug_printmodeline] Modeline 80:"1920x1080" 60 148352 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5
>[    6.510283] [drm:drm_mode_debug_printmodeline] Modeline 72:"1920x1080" 50 148500 1920 2448 2492 2640 1080 1084 1089 1125 0x40 0x5
>[    6.510285] [drm:drm_mode_debug_printmodeline] Modeline 76:"1920x1080" 24 74250 1920 2558 2602 2750 1080 1084 1089 1125 0x40 0x5
>[    6.510287] [drm:drm_mode_debug_printmodeline] Modeline 92:"1920x1080" 24 74176 1920 2558 2602 2750 1080 1084 1089 1125 0x40 0x5
>[    6.510289] [drm:drm_mode_debug_printmodeline] Modeline 60:"1280x1024" 75 135000 1280 1296 1440 1688 1024 1025 1028 1066 0x40 0x5
>[    6.510291] [drm:drm_mode_debug_printmodeline] Modeline 53:"1280x1024" 60 108000 1280 1328 1440 1688 1024 1025 1028 1066 0x40 0x5
>[    6.510293] [drm:drm_mode_debug_printmodeline] Modeline 55:"1152x864" 75 108000 1152 1216 1344 1600 864 865 868 900 0x40 0x5
>[    6.510295] [drm:drm_mode_debug_printmodeline] Modeline 51:"1280x720" 60 74250 1280 1390 1430 1650 720 725 730 750 0x40 0x5
>[    6.510297] [drm:drm_mode_debug_printmodeline] Modeline 82:"1280x720" 60 74176 1280 1390 1430 1650 720 725 730 750 0x40 0x5
>[    6.510298] [drm:drm_mode_debug_printmodeline] Modeline 74:"1280x720" 50 74250 1280 1720 1760 1980 720 725 730 750 0x40 0x5
>[    6.510300] [drm:drm_mode_debug_printmodeline] Modeline 61:"1024x768" 75 78800 1024 1040 1136 1312 768 769 772 800 0x40 0x5
>[    6.510302] [drm:drm_mode_debug_printmodeline] Modeline 62:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[    6.510304] [drm:drm_mode_debug_printmodeline] Modeline 63:"800x600" 75 49500 800 816 896 1056 600 601 604 625 0x40 0x5
>[    6.510306] [drm:drm_mode_debug_printmodeline] Modeline 56:"800x600" 60 40000 800 840 968 1056 600 601 605 628 0x40 0x5
>[    6.510308] [drm:drm_mode_debug_printmodeline] Modeline 73:"720x576" 50 27000 720 732 796 864 576 581 586 625 0x40 0xa
>[    6.510310] [drm:drm_mode_debug_printmodeline] Modeline 83:"720x480" 60 27027 720 736 798 858 480 489 495 525 0x40 0xa
>[    6.510312] [drm:drm_mode_debug_printmodeline] Modeline 52:"720x480" 60 27000 720 736 798 858 480 489 495 525 0x40 0xa
>[    6.510313] [drm:drm_mode_debug_printmodeline] Modeline 57:"640x480" 75 31500 640 656 720 840 480 481 484 500 0x40 0xa
>[    6.510315] [drm:drm_mode_debug_printmodeline] Modeline 58:"640x480" 60 25200 640 656 752 800 480 490 492 525 0x40 0xa
>[    6.510317] [drm:drm_mode_debug_printmodeline] Modeline 71:"640x480" 60 25175 640 656 752 800 480 490 492 525 0x40 0xa
>[    6.510319] [drm:drm_mode_debug_printmodeline] Modeline 59:"720x400" 70 28320 720 738 846 900 400 412 414 449 0x40 0x6
>[    6.510320] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:45:DP-5]
>[    6.510322] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:45:DP-5] disconnected
>[    6.510328] [drm:drm_setup_crtcs] 
>[    6.510330] [drm:drm_enable_connectors] connector 19 enabled? yes
>[    6.510330] [drm:drm_enable_connectors] connector 27 enabled? no
>[    6.510331] [drm:drm_enable_connectors] connector 31 enabled? no
>[    6.510332] [drm:drm_enable_connectors] connector 34 enabled? no
>[    6.510333] [drm:drm_enable_connectors] connector 38 enabled? no
>[    6.510334] [drm:drm_enable_connectors] connector 39 enabled? no
>[    6.510334] [drm:drm_enable_connectors] connector 43 enabled? yes
>[    6.510335] [drm:drm_enable_connectors] connector 45 enabled? no
>[    6.510337] [drm:intel_fb_initial_config] looking for cmdline mode on connector eDP-1
>[    6.510338] [drm:intel_fb_initial_config] looking for preferred mode on connector eDP-1
>[    6.510339] [drm:intel_fb_initial_config] connector eDP-1 on pipe A [CRTC:8]: 1920x1080
>[    6.510340] [drm:intel_fb_initial_config] connector DP-1 not enabled, skipping
>[    6.510341] [drm:intel_fb_initial_config] connector HDMI-A-1 not enabled, skipping
>[    6.510342] [drm:intel_fb_initial_config] connector DP-2 not enabled, skipping
>[    6.510342] [drm:intel_fb_initial_config] connector HDMI-A-2 not enabled, skipping
>[    6.510343] [drm:intel_fb_initial_config] connector DP-3 not enabled, skipping
>[    6.510344] [drm:intel_fb_initial_config] connector DP-4 has no encoder or crtc, skipping
>[    6.510344] [drm:intel_fb_initial_config] connector DP-5 not enabled, skipping
>[    6.510345] [drm:intel_fb_initial_config] fallback: Not all outputs enabled
>[    6.510346] [drm:intel_fb_initial_config] Enabled: 1, detected: 2
>[    6.510347] [drm:intel_fb_initial_config] Not using firmware configuration
>[    6.510348] [drm:drm_target_preferred] looking for cmdline mode on connector 19
>[    6.510349] [drm:drm_target_preferred] looking for preferred mode on connector 19
>[    6.510349] [drm:drm_target_preferred] found mode 1920x1080
>[    6.510350] [drm:drm_target_preferred] looking for cmdline mode on connector 43
>[    6.510351] [drm:drm_target_preferred] looking for preferred mode on connector 43
>[    6.510352] [drm:drm_target_preferred] found mode 1920x1080
>[    6.510353] [drm:drm_setup_crtcs] picking CRTCs for 8192x8192 config
>[    6.510358] [drm:drm_setup_crtcs] desired mode 1920x1080 set on crtc 8
>[    6.510361] [drm:drm_setup_crtcs] desired mode 1920x1080 set on crtc 12
>[    6.510373] [drm:intel_crtc_set_config] [CRTC:8] [FB:41] #connectors=1 (x y) (0 0)
>[    6.510375] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:8], mode_changed=0, fb_changed=0
>[    6.510376] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[    6.510378] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 1, prepare: 1, disable: 0
>[    6.510380] [drm:connected_sink_compute_bpp] [CONNECTOR:19:eDP-1] checking for sink bpp constrains
>[    6.510380] [drm:connected_sink_compute_bpp] clamping display bpp (was 24) to EDID reported max of 18
>[    6.510382] [drm:intel_dp_compute_config] DP link computation with max lane count 2 max bw 0a pixel clock 141000KHz
>[    6.510383] [drm:intel_dp_compute_config] DP link bw 0a lane count 2 clock 270000 bpp 18
>[    6.510384] [drm:intel_dp_compute_config] DP link bw required 253800 available 432000
>[    6.510386] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 18, dithering: 1
>[    6.510387] [drm:intel_dump_pipe_config] [CRTC:8][modeset] config for pipe A
>[    6.510387] [drm:intel_dump_pipe_config] cpu_transcoder: D
>[    6.510388] [drm:intel_dump_pipe_config] pipe bpp: 18, dithering: 1
>[    6.510390] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[    6.510391] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 4928307, gmch_n: 8388608, link_m: 273794, link_n: 524288, tu: 64
>[    6.510392] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[    6.510393] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[    6.510394] [drm:intel_dump_pipe_config] requested mode:
>[    6.510396] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[    6.510396] [drm:intel_dump_pipe_config] adjusted mode:
>[    6.510398] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[    6.510400] [drm:intel_dump_crtc_timings] crtc timings: 141000 1920 1936 1952 2104 1080 1083 1097 1116, type: 0x48 flags: 0xa
>[    6.510401] [drm:intel_dump_pipe_config] port clock: 270000
>[    6.510402] [drm:intel_dump_pipe_config] pipe src size: 1920x1080
>[    6.510403] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[    6.510404] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[    6.510405] [drm:intel_dump_pipe_config] ips: 1
>[    6.510405] [drm:intel_dump_pipe_config] double wide: 0
>[    6.510408] [drm:intel_crtc_set_config] [CRTC:12] [FB:41] #connectors=1 (x y) (0 0)
>[    6.510409] [drm:intel_set_config_compute_mode_changes] inactive crtc, full mode set
>[    6.510410] [drm:intel_set_config_compute_mode_changes] modes are different, full mode set
>[    6.510412] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0 0 0 0x0 0x0
>[    6.510414] [drm:drm_mode_debug_printmodeline] Modeline 48:"1920x1080" 60 148500 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5
>[    6.510415] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:12], mode_changed=1, fb_changed=0
>[    6.510416] [drm:intel_modeset_stage_output_state] encoder changed, full mode switch
>[    6.510417] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[    6.510418] [drm:intel_modeset_stage_output_state] [CONNECTOR:43:DP-4] to [CRTC:12]
>[    6.510419] [drm:intel_modeset_stage_output_state] crtc changed, full mode switch
>[    6.510420] [drm:intel_modeset_stage_output_state] crtc enabled, full mode switch
>[    6.510421] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 2, prepare: 2, disable: 0
>[    6.510422] [drm:connected_sink_compute_bpp] [CONNECTOR:43:DP-4] checking for sink bpp constrains
>[    6.510423] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 24, dithering: 0
>[    6.510424] [drm:intel_dump_pipe_config] [CRTC:12][modeset] config for pipe B
>[    6.510425] [drm:intel_dump_pipe_config] cpu_transcoder: B
>[    6.510426] [drm:intel_dump_pipe_config] pipe bpp: 24, dithering: 0
>[    6.510427] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[    6.510428] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 1730150, gmch_n: 8388608, link_m: 288358, link_n: 1048576, tu: 14
>[    6.510430] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[    6.510430] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[    6.510431] [drm:intel_dump_pipe_config] requested mode:
>[    6.510433] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 148500 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5
>[    6.510433] [drm:intel_dump_pipe_config] adjusted mode:
>[    6.510435] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 148500 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5
>[    6.510437] [drm:intel_dump_crtc_timings] crtc timings: 148500 1920 2008 2052 2200 1080 1084 1089 1125, type: 0x40 flags: 0x5
>[    6.510438] [drm:intel_dump_pipe_config] port clock: 540000
>[    6.510439] [drm:intel_dump_pipe_config] pipe src size: 1920x1080
>[    6.510440] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[    6.510440] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[    6.510441] [drm:intel_dump_pipe_config] ips: 0
>[    6.510442] [drm:intel_dump_pipe_config] double wide: 0
>[    6.510456] [drm:intel_display_power_get] enabling display
>[    6.510462] [drm:hsw_set_power_well] Enabling power well
>[    6.519222] [drm:intel_mst_pre_enable_dp] 0
>[    6.522194] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.522195] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.522201] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.526872] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.537317] [drm:drm_dp_dpcd_access] too many retries, giving up
>[    6.537978] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[    6.555628] usb 1-8: new high-speed USB device number 6 using xhci_hcd
>[    6.557941] [drm:intel_dp_start_link_train] clock recovery OK
>[    6.585685] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training successful
>[    6.586966] [drm:drm_dp_mst_allocate_vcpi] initing vcpi for 532 14
>[    6.592179] [drm:intel_mst_enable_dp] 1
>[    6.599185] [drm:drm_dp_update_payload_part2] payload 0 1
>[    6.620015] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.620016] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.620041] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.621766] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.627626] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.627627] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.685647] [drm:swsci] SWSCI request timed out
>[    6.699322] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
>[    6.700217] i915 0000:00:02.0: registered panic notifier
>[    6.711671] [drm:ironlake_update_primary_plane] Writing base 00191000 00000000 0 0 7680
>[    6.712668] [drm:intel_update_fbc] more than one pipe active, disabling compression
>[    6.712838] snd_hda_intel 0000:00:03.0: irq 44 for MSI/MSI-X
>[    6.715877] [drm:intel_connector_check_state] [CONNECTOR:19:eDP-1]
>[    6.717299] [drm:intel_connector_check_state] [CONNECTOR:43:DP-4]
>[    6.718281] [drm:check_encoder_state] [ENCODER:18:TMDS-18]
>[    6.719227] [drm:check_encoder_state] [ENCODER:26:TMDS-26]
>[    6.720160] [drm:check_encoder_state] [ENCODER:28:DP MST-28]
>[    6.721076] [drm:check_encoder_state] [ENCODER:29:DP MST-29]
>[    6.721981] [drm:check_encoder_state] [ENCODER:30:DP MST-30]
>[    6.722949] [drm:check_encoder_state] [ENCODER:33:TMDS-33]
>[    6.723958] [drm:check_encoder_state] [ENCODER:35:DP MST-35]
>[    6.725011] [drm:check_encoder_state] [ENCODER:36:DP MST-36]
>[    6.726058] [drm:check_encoder_state] [ENCODER:37:DP MST-37]
>[    6.727018] [drm:check_crtc_state] [CRTC:8]
>[    6.727881] [drm:check_crtc_state] [CRTC:12]
>[    6.728688] [drm:check_crtc_state] [CRTC:16]
>[    6.729494] [drm:check_shared_dpll_state] WRPLL 1
>[    6.730561] [drm:check_shared_dpll_state] WRPLL 2
>[    6.731939] [drm:intel_crtc_set_config] [CRTC:16] [NOFB]
>[    6.733300] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:16], mode_changed=0, fb_changed=0
>[    6.734281] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[    6.735783] [drm:intel_modeset_stage_output_state] [CONNECTOR:43:DP-4] to [CRTC:12]
>[    6.736865] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 0, prepare: 0, disable: 0
>[    6.739027] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.740253] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.741519] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.743049] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.744264] [drm:drm_dp_send_enum_path_resources] enum path resources 3: 765 765
>[    6.745055] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.745057] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.747168] [drm:intel_backlight_device_update_status] updating intel_backlight, brightness=851/851
>[    6.747172] [drm:intel_panel_actually_set_backlight] set backlight PWM = 851
>[    6.749400] [drm:drm_fb_helper_hotplug_event] 
>[    6.750249] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:19:eDP-1]
>[    6.751077] [drm:intel_dp_detect] [CONNECTOR:19:eDP-1]
>[    6.752841] [drm:intel_dp_probe_oui] Sink OUI: 001cf8
>[    6.754360] [drm:intel_dp_probe_oui] Branch OUI: 000000
>[    6.755234] [drm:drm_edid_to_eld] ELD: no CEA Extension found
>[    6.756085] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:19:eDP-1] probed modes :
>[    6.756859] [drm:drm_mode_debug_printmodeline] Modeline 20:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[    6.757561] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:DP-1]
>[    6.758274] [drm:intel_dp_detect] [CONNECTOR:27:DP-1]
>[    6.759029] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:DP-1] disconnected
>[    6.759782] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:31:HDMI-A-1]
>[    6.760508] [drm:intel_hdmi_detect] [CONNECTOR:31:HDMI-A-1]
>[    6.772298] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[    6.773046] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:31:HDMI-A-1] disconnected
>[    6.773805] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:34:DP-2]
>[    6.774556] [drm:intel_dp_detect] [CONNECTOR:34:DP-2]
>[    6.775306] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:34:DP-2] disconnected
>[    6.776101] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:38:HDMI-A-2]
>[    6.776892] [drm:intel_hdmi_detect] [CONNECTOR:38:HDMI-A-2]
>[    6.777806] [drm:gmbus_xfer] GMBUS [i915 gmbus dpc] NAK for addr: 0050 r(1)
>[    6.778561] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpc
>[    6.779379] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:38:HDMI-A-2] disconnected
>[    6.780169] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:39:DP-3]
>[    6.780937] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:39:DP-3] disconnected
>[    6.781688] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:43:DP-4]
>[    6.791718] usb 1-8: New USB device found, idVendor=04ca, idProduct=7035
>[    6.792949] usb 1-8: New USB device strings: Mfr=1, Product=2, SerialNumber=0
>[    6.793989] usb 1-8: Product: Integrated Camera
>[    6.794312] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.794314] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.794334] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.794857] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.795921] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.795922] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.800277] usb 1-8: Manufacturer: J30E8KAGD
>[    6.829851] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.831060] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.831914] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.833226] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.835753] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.836524] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.836558] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.836559] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.838877] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.840237] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.842799] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.843603] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.843604] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.843605] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.846116] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.847457] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.850067] [drm:intel_dp_check_mst_status] got esi2 02 10 00
>[    6.850384] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.850385] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.852584] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.854461] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.856003] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.856910] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.858207] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.882903] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.884170] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.885177] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.886541] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.889097] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.889874] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.889895] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.889896] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.892235] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.893581] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.896102] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.896893] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.896895] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.896896] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.899157] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.900414] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.902874] [drm:intel_dp_check_mst_status] got esi2 02 10 00
>[    6.903180] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.903181] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.904984] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.906185] [drm:drm_edid_to_eld] ELD monitor DELL U2413
>[    6.906790] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.906791] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.906798] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.907294] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.910104] [drm:drm_edid_to_eld] ELD size 36, SAD count 1
>[    6.910787] [drm:drm_mode_debug_printmodeline] Modeline 66:"1920x1200" 60 154000 1920 1968 2000 2080 1200 1203 1209 1235 0x48 0x9
>[    6.911463] [drm:drm_mode_prune_invalid] Not using 1920x1200 mode 12
>[    6.912132] [drm:drm_mode_debug_printmodeline] Modeline 68:"1920x1080i" 60 74250 1920 2008 2052 2200 1080 1084 1094 1125 0x40 0x15
>[    6.912845] [drm:drm_mode_prune_invalid] Not using 1920x1080i mode 7
>[    6.913567] [drm:drm_mode_debug_printmodeline] Modeline 77:"1600x1200" 0 162000 1600 1664 1856 2160 1200 1201 1204 1250 0x40 0x5
>[    6.914283] [drm:drm_mode_prune_invalid] Not using 1600x1200 mode 12
>[    6.915005] [drm:drm_mode_debug_printmodeline] Modeline 96:"720x480i" 0 13500 720 739 801 858 480 488 494 525 0x40 0x101a
>[    6.915768] [drm:drm_mode_prune_invalid] Not using 720x480i mode 7
>[    6.916532] [drm:drm_mode_debug_printmodeline] Modeline 97:"720x576i" 0 13500 720 732 795 864 576 580 586 625 0x40 0x101a
>[    6.917283] [drm:drm_mode_prune_invalid] Not using 720x576i mode 7
>[    6.918024] [drm:drm_mode_debug_printmodeline] Modeline 102:"1920x1080i" 0 74250 1920 2448 2492 2640 1080 1084 1094 1125 0x40 0x15
>[    6.918788] [drm:drm_mode_prune_invalid] Not using 1920x1080i mode 7
>[    6.919598] [drm:drm_mode_debug_printmodeline] Modeline 108:"1920x1080i" 60 74176 1920 2008 2052 2200 1080 1084 1094 1125 0x40 0x15
>[    6.920411] [drm:drm_mode_prune_invalid] Not using 1920x1080i mode 7
>[    6.921208] [drm:drm_mode_debug_printmodeline] Modeline 117:"720x480i" 60 13513 720 739 801 858 480 488 494 525 0x40 0x101a
>[    6.922031] [drm:drm_mode_prune_invalid] Not using 720x480i mode 7
>[    6.922895] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:43:DP-4] probed modes :
>[    6.923744] [drm:drm_mode_debug_printmodeline] Modeline 49:"1920x1080" 60 148500 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5
>[    6.924589] [drm:drm_mode_debug_printmodeline] Modeline 80:"1920x1080" 60 148352 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5
>[    6.925429] [drm:drm_mode_debug_printmodeline] Modeline 72:"1920x1080" 50 148500 1920 2448 2492 2640 1080 1084 1089 1125 0x40 0x5
>[    6.926292] [drm:drm_mode_debug_printmodeline] Modeline 76:"1920x1080" 24 74250 1920 2558 2602 2750 1080 1084 1089 1125 0x40 0x5
>[    6.927169] [drm:drm_mode_debug_printmodeline] Modeline 92:"1920x1080" 24 74176 1920 2558 2602 2750 1080 1084 1089 1125 0x40 0x5
>[    6.928013] [drm:drm_mode_debug_printmodeline] Modeline 60:"1280x1024" 75 135000 1280 1296 1440 1688 1024 1025 1028 1066 0x40 0x5
>[    6.928874] [drm:drm_mode_debug_printmodeline] Modeline 53:"1280x1024" 60 108000 1280 1328 1440 1688 1024 1025 1028 1066 0x40 0x5
>[    6.929731] [drm:drm_mode_debug_printmodeline] Modeline 55:"1152x864" 75 108000 1152 1216 1344 1600 864 865 868 900 0x40 0x5
>[    6.930573] [drm:drm_mode_debug_printmodeline] Modeline 51:"1280x720" 60 74250 1280 1390 1430 1650 720 725 730 750 0x40 0x5
>[    6.931419] [drm:drm_mode_debug_printmodeline] Modeline 82:"1280x720" 60 74176 1280 1390 1430 1650 720 725 730 750 0x40 0x5
>[    6.932294] [drm:drm_mode_debug_printmodeline] Modeline 74:"1280x720" 50 74250 1280 1720 1760 1980 720 725 730 750 0x40 0x5
>[    6.933173] [drm:drm_mode_debug_printmodeline] Modeline 61:"1024x768" 75 78800 1024 1040 1136 1312 768 769 772 800 0x40 0x5
>[    6.934014] [drm:drm_mode_debug_printmodeline] Modeline 62:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[    6.934850] [drm:drm_mode_debug_printmodeline] Modeline 63:"800x600" 75 49500 800 816 896 1056 600 601 604 625 0x40 0x5
>[    6.935720] [drm:drm_mode_debug_printmodeline] Modeline 56:"800x600" 60 40000 800 840 968 1056 600 601 605 628 0x40 0x5
>[    6.936587] [drm:drm_mode_debug_printmodeline] Modeline 73:"720x576" 50 27000 720 732 796 864 576 581 586 625 0x40 0xa
>[    6.937432] [drm:drm_mode_debug_printmodeline] Modeline 83:"720x480" 60 27027 720 736 798 858 480 489 495 525 0x40 0xa
>[    6.938268] [drm:drm_mode_debug_printmodeline] Modeline 52:"720x480" 60 27000 720 736 798 858 480 489 495 525 0x40 0xa
>[    6.939125] [drm:drm_mode_debug_printmodeline] Modeline 57:"640x480" 75 31500 640 656 720 840 480 481 484 500 0x40 0xa
>[    6.939981] [drm:drm_mode_debug_printmodeline] Modeline 58:"640x480" 60 25200 640 656 752 800 480 490 492 525 0x40 0xa
>[    6.940807] [drm:drm_mode_debug_printmodeline] Modeline 71:"640x480" 60 25175 640 656 752 800 480 490 492 525 0x40 0xa
>[    6.941632] [drm:drm_mode_debug_printmodeline] Modeline 59:"720x400" 70 28320 720 738 846 900 400 412 414 449 0x40 0x6
>[    6.942486] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:45:DP-5]
>[    6.943348] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:45:DP-5] disconnected
>[    6.944169] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:50:DP-6]
>[    6.944978] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:50:DP-6] disconnected
>[    6.945817] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:64:DP-7]
>[    6.947962] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.949256] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.950254] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.951813] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.953790] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.955358] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.955505] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.955506] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.957936] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.959255] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.961829] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.962637] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.962638] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.964407] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.965229] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.966614] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.969201] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.969977] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    6.969978] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    6.971718] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.972585] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    6.973940] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    6.975847] [drm:drm_edid_to_eld] ELD: no CEA Extension found
>[    6.976513] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    6.976514] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    6.978572] [drm:drm_mode_debug_printmodeline] Modeline 67:"1920x1200" 60 154000 1920 1968 2000 2080 1200 1203 1209 1235 0x48 0x9
>[    6.979396] [drm:drm_mode_prune_invalid] Not using 1920x1200 mode 12
>[    6.980212] [drm:drm_mode_debug_printmodeline] Modeline 69:"1600x1200" 0 162000 1600 1664 1856 2160 1200 1201 1204 1250 0x40 0x5
>[    6.981006] [drm:drm_mode_prune_invalid] Not using 1600x1200 mode 12
>[    6.981790] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:64:DP-7] probed modes :
>[    6.982610] [drm:drm_mode_debug_printmodeline] Modeline 81:"1280x1024" 75 135000 1280 1296 1440 1688 1024 1025 1028 1066 0x40 0x5
>[    6.983438] [drm:drm_mode_debug_printmodeline] Modeline 68:"1280x1024" 60 108000 1280 1328 1440 1688 1024 1025 1028 1066 0x40 0x5
>[    6.984218] [drm:drm_mode_debug_printmodeline] Modeline 70:"1152x864" 75 108000 1152 1216 1344 1600 864 865 868 900 0x40 0x5
>[    6.984991] [drm:drm_mode_debug_printmodeline] Modeline 84:"1024x768" 75 78800 1024 1040 1136 1312 768 769 772 800 0x40 0x5
>[    6.985798] [drm:drm_mode_debug_printmodeline] Modeline 85:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[    6.986569] [drm:drm_mode_debug_printmodeline] Modeline 86:"800x600" 75 49500 800 816 896 1056 600 601 604 625 0x40 0x5
>[    6.987309] [drm:drm_mode_debug_printmodeline] Modeline 75:"800x600" 60 40000 800 840 968 1056 600 601 605 628 0x40 0x5
>[    6.988033] [drm:drm_mode_debug_printmodeline] Modeline 77:"640x480" 75 31500 640 656 720 840 480 481 484 500 0x40 0xa
>[    6.988749] [drm:drm_mode_debug_printmodeline] Modeline 78:"640x480" 60 25200 640 656 752 800 480 490 492 525 0x40 0xa
>[    6.989482] [drm:drm_mode_debug_printmodeline] Modeline 79:"720x400" 70 28320 720 738 846 900 400 412 414 449 0x40 0x6
>[    6.990212] [drm:drm_setup_crtcs] 
>[    6.990901] [drm:drm_enable_connectors] connector 19 enabled? yes
>[    6.991603] [drm:drm_enable_connectors] connector 27 enabled? no
>[    6.992324] [drm:drm_enable_connectors] connector 31 enabled? no
>[    6.993045] [drm:drm_enable_connectors] connector 34 enabled? no
>[    6.993721] [drm:drm_enable_connectors] connector 38 enabled? no
>[    6.994396] [drm:drm_enable_connectors] connector 39 enabled? no
>[    6.995057] [drm:drm_enable_connectors] connector 43 enabled? yes
>[    6.995738] [drm:drm_enable_connectors] connector 45 enabled? no
>[    6.996420] [drm:drm_enable_connectors] connector 50 enabled? no
>[    6.997066] [drm:drm_enable_connectors] connector 64 enabled? yes
>[    6.997706] [drm:intel_fb_initial_config] looking for cmdline mode on connector eDP-1
>[    6.998358] [drm:intel_fb_initial_config] looking for preferred mode on connector eDP-1
>[    6.999034] [drm:intel_fb_initial_config] connector eDP-1 on pipe A [CRTC:8]: 1920x1080
>[    6.999720] [drm:intel_fb_initial_config] connector DP-1 not enabled, skipping
>[    7.000368] [drm:intel_fb_initial_config] connector HDMI-A-1 not enabled, skipping
>[    7.001018] [drm:intel_fb_initial_config] connector DP-2 not enabled, skipping
>[    7.001671] [drm:intel_fb_initial_config] connector HDMI-A-2 not enabled, skipping
>[    7.002355] [drm:intel_fb_initial_config] connector DP-3 not enabled, skipping
>[    7.003045] [drm:intel_fb_initial_config] looking for cmdline mode on connector DP-4
>[    7.003711] [drm:intel_fb_initial_config] looking for preferred mode on connector DP-4
>[    7.004376] [drm:intel_fb_initial_config] using first mode listed on connector DP-4
>[    7.005030] [drm:intel_fb_initial_config] connector DP-4 on pipe B [CRTC:12]: 1920x1080
>[    7.005720] [drm:intel_fb_initial_config] connector DP-5 not enabled, skipping
>[    7.006415] [drm:intel_fb_initial_config] connector DP-6 not enabled, skipping
>[    7.007074] [drm:intel_fb_initial_config] connector DP-7 has no encoder or crtc, skipping
>[    7.007739] [drm:intel_fb_initial_config] fallback: Not all outputs enabled
>[    7.008395] [drm:intel_fb_initial_config] Enabled: 2, detected: 3
>[    7.009074] [drm:intel_fb_initial_config] Not using firmware configuration
>[    7.009760] [drm:drm_target_preferred] looking for cmdline mode on connector 19
>[    7.010418] [drm:drm_target_preferred] looking for preferred mode on connector 19
>[    7.011081] [drm:drm_target_preferred] found mode 1920x1080
>[    7.011746] [drm:drm_target_preferred] looking for cmdline mode on connector 43
>[    7.012439] [drm:drm_target_preferred] looking for preferred mode on connector 43
>[    7.013132] [drm:drm_target_preferred] found mode 1920x1080
>[    7.013789] [drm:drm_target_preferred] looking for cmdline mode on connector 64
>[    7.014450] [drm:drm_target_preferred] looking for preferred mode on connector 64
>[    7.015115] [drm:drm_target_preferred] found mode 1280x1024
>[    7.015799] [drm:drm_setup_crtcs] picking CRTCs for 8192x8192 config
>[    7.016495] [drm:drm_setup_crtcs] desired mode 1920x1080 set on crtc 8
>[    7.017152] [drm:drm_setup_crtcs] desired mode 1920x1080 set on crtc 12
>[    7.017800] [drm:drm_setup_crtcs] desired mode 1280x1024 set on crtc 16
>[    7.018449] [drm:intel_crtc_set_config] [CRTC:8] [FB:41] #connectors=1 (x y) (0 0)
>[    7.019134] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:8], mode_changed=0, fb_changed=0
>[    7.019833] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[    7.020501] [drm:intel_modeset_stage_output_state] [CONNECTOR:43:DP-4] to [CRTC:12]
>[    7.021165] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 1, prepare: 1, disable: 0
>[    7.021839] [drm:connected_sink_compute_bpp] [CONNECTOR:19:eDP-1] checking for sink bpp constrains
>[    7.022551] [drm:connected_sink_compute_bpp] clamping display bpp (was 24) to EDID reported max of 18
>[    7.023270] [drm:intel_dp_compute_config] DP link computation with max lane count 2 max bw 0a pixel clock 141000KHz
>[    7.023969] [drm:intel_dp_compute_config] DP link bw 0a lane count 2 clock 270000 bpp 18
>[    7.024674] [drm:intel_dp_compute_config] DP link bw required 253800 available 432000
>[    7.025365] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 18, dithering: 1
>[    7.026076] [drm:intel_dump_pipe_config] [CRTC:8][modeset] config for pipe A
>[    7.026781] [drm:intel_dump_pipe_config] cpu_transcoder: D
>[    7.027436] [drm:intel_dump_pipe_config] pipe bpp: 18, dithering: 1
>[    7.028082] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[    7.028730] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 4928307, gmch_n: 8388608, link_m: 273794, link_n: 524288, tu: 64
>[    7.029422] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[    7.030114] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[    7.030766] [drm:intel_dump_pipe_config] requested mode:
>[    7.031418] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[    7.032093] [drm:intel_dump_pipe_config] adjusted mode:
>[    7.032801] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[    7.033540] [drm:intel_dump_crtc_timings] crtc timings: 141000 1920 1936 1952 2104 1080 1083 1097 1116, type: 0x48 flags: 0xa
>[    7.034262] [drm:intel_dump_pipe_config] port clock: 270000
>[    7.034982] [drm:intel_dump_pipe_config] pipe src size: 1920x1080
>[    7.035716] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[    7.036471] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[    7.037203] [drm:intel_dump_pipe_config] ips: 1
>[    7.037935] [drm:intel_dump_pipe_config] double wide: 0
>[    7.038673] [drm:intel_crtc_set_config] [CRTC:12] [FB:41] #connectors=1 (x y) (0 0)
>[    7.039457] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:12], mode_changed=0, fb_changed=0
>[    7.040271] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[    7.041063] [drm:intel_modeset_stage_output_state] [CONNECTOR:43:DP-4] to [CRTC:12]
>[    7.041859] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 2, prepare: 2, disable: 0
>[    7.042701] [drm:connected_sink_compute_bpp] [CONNECTOR:43:DP-4] checking for sink bpp constrains
>[    7.043561] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 24, dithering: 0
>[    7.044389] [drm:intel_dump_pipe_config] [CRTC:12][modeset] config for pipe B
>[    7.045222] [drm:intel_dump_pipe_config] cpu_transcoder: B
>[    7.046078] [drm:intel_dump_pipe_config] pipe bpp: 24, dithering: 0
>[    7.046936] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[    7.047779] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 1730150, gmch_n: 8388608, link_m: 288358, link_n: 1048576, tu: 14
>[    7.048634] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[    7.049520] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[    7.050407] [drm:intel_dump_pipe_config] requested mode:
>[    7.051258] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 148500 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5
>[    7.052140] [drm:intel_dump_pipe_config] adjusted mode:
>[    7.053049] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 148500 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5
>[    7.053987] [drm:intel_dump_crtc_timings] crtc timings: 148500 1920 2008 2052 2200 1080 1084 1089 1125, type: 0x40 flags: 0x5
>[    7.054909] [drm:intel_dump_pipe_config] port clock: 540000
>[    7.055864] [drm:intel_dump_pipe_config] pipe src size: 1920x1080
>[    7.056819] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[    7.057761] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[    7.058706] [drm:intel_dump_pipe_config] ips: 0
>[    7.059674] [drm:intel_dump_pipe_config] double wide: 0
>[    7.060638] [drm:intel_crtc_set_config] [CRTC:16] [FB:41] #connectors=1 (x y) (0 0)
>[    7.061583] [drm:intel_set_config_compute_mode_changes] inactive crtc, full mode set
>[    7.062561] [drm:intel_set_config_compute_mode_changes] modes are different, full mode set
>[    7.063540] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0 0 0 0x0 0x0
>[    7.064497] [drm:drm_mode_debug_printmodeline] Modeline 67:"1280x1024" 75 135000 1280 1296 1440 1688 1024 1025 1028 1066 0x40 0x5
>[    7.065468] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:16], mode_changed=1, fb_changed=0
>[    7.066480] [drm:intel_modeset_stage_output_state] encoder changed, full mode switch
>[    7.067499] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[    7.068486] [drm:intel_modeset_stage_output_state] [CONNECTOR:43:DP-4] to [CRTC:12]
>[    7.069496] [drm:intel_modeset_stage_output_state] [CONNECTOR:64:DP-7] to [CRTC:16]
>[    7.070500] [drm:intel_modeset_stage_output_state] crtc changed, full mode switch
>[    7.071481] [drm:intel_modeset_stage_output_state] crtc enabled, full mode switch
>[    7.072492] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 4, prepare: 4, disable: 0
>[    7.073508] [drm:connected_sink_compute_bpp] [CONNECTOR:64:DP-7] checking for sink bpp constrains
>[    7.074494] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 24, dithering: 0
>[    7.075487] [drm:intel_dump_pipe_config] [CRTC:16][modeset] config for pipe C
>[    7.076492] [drm:intel_dump_pipe_config] cpu_transcoder: C
>[    7.077466] [drm:intel_dump_pipe_config] pipe bpp: 24, dithering: 0
>[    7.078431] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[    7.079436] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 1572864, gmch_n: 8388608, link_m: 262144, link_n: 1048576, tu: 13
>[    7.080442] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[    7.081414] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[    7.082412] [drm:intel_dump_pipe_config] requested mode:
>[    7.083401] [drm:drm_mode_debug_printmodeline] Modeline 0:"1280x1024" 75 135000 1280 1296 1440 1688 1024 1025 1028 1066 0x40 0x5
>[    7.084384] [drm:intel_dump_pipe_config] adjusted mode:
>[    7.085367] [drm:drm_mode_debug_printmodeline] Modeline 0:"1280x1024" 75 135000 1280 1296 1440 1688 1024 1025 1028 1066 0x40 0x5
>[    7.086410] [drm:intel_dump_crtc_timings] crtc timings: 135000 1280 1296 1440 1688 1024 1025 1028 1066, type: 0x40 flags: 0x5
>[    7.087463] [drm:intel_dump_pipe_config] port clock: 540000
>[    7.088475] [drm:intel_dump_pipe_config] pipe src size: 1280x1024
>[    7.089507] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[    7.090554] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[    7.091576] [drm:intel_dump_pipe_config] ips: 0
>[    7.092608] [drm:intel_dump_pipe_config] double wide: 0
>[    7.093655] [drm:intel_mst_pre_enable_dp] 1
>[    7.094625] [drm:drm_dp_mst_allocate_vcpi] initing vcpi for 483 13
>[    7.096304] [drm:intel_mst_enable_dp] 2
>[    7.097437] [drm:drm_dp_update_payload_part2] payload 0 2
>[    7.098406] [drm:drm_dp_update_payload_part2] payload 1 1
>[    7.100779] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[    7.102266] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[    7.103380] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[    7.104969] [drm:intel_dp_check_mst_status] got esi 02 10 00
>[    7.107021] [drm:intel_dp_check_mst_status] got esi2 02 00 00
>[    7.107958] [drm:intel_dp_check_mst_status] got esi 02 00 00
>[    7.112193] [drm:ironlake_update_primary_plane] Writing base 00191000 00000000 0 0 7680
>[    7.113656] [drm:intel_connector_check_state] [CONNECTOR:19:eDP-1]
>[    7.114710] [drm:intel_connector_check_state] [CONNECTOR:43:DP-4]
>[    7.115641] [drm:intel_connector_check_state] [CONNECTOR:64:DP-7]
>[    7.116558] [drm:check_encoder_state] [ENCODER:18:TMDS-18]
>[    7.117439] [drm:check_encoder_state] [ENCODER:26:TMDS-26]
>[    7.118319] [drm:check_encoder_state] [ENCODER:28:DP MST-28]
>[    7.119225] [drm:check_encoder_state] [ENCODER:29:DP MST-29]
>[    7.120114] [drm:check_encoder_state] [ENCODER:30:DP MST-30]
>[    7.120961] [drm:check_encoder_state] [ENCODER:33:TMDS-33]
>[    7.121797] [drm:check_encoder_state] [ENCODER:35:DP MST-35]
>[    7.122654] [drm:check_encoder_state] [ENCODER:36:DP MST-36]
>[    7.123509] [drm:check_encoder_state] [ENCODER:37:DP MST-37]
>[    7.124310] [drm:check_crtc_state] [CRTC:8]
>[    7.125100] [drm:check_crtc_state] [CRTC:12]
>[    7.125908] [drm:check_crtc_state] [CRTC:16]
>[    7.126673] [drm:check_shared_dpll_state] WRPLL 1
>[    7.127398] [drm:check_shared_dpll_state] WRPLL 2
>[    9.754689] [drm:edp_panel_vdd_off_sync] Turning eDP port A VDD off
>[    9.755756] [drm:edp_panel_vdd_off_sync] PP_STATUS: 0x80000008 PP_CONTROL: 0xabcd0007
>[   10.208669] psmouse serio2: trackpoint: IBM TrackPoint firmware: 0x0e, buttons: 3/3
>[   10.419981] input: TPPS/2 IBM TrackPoint as /devices/platform/i8042/serio1/serio2/input/input9
>[   18.346096] random: nonblocking pool is initialized
>[   21.713931] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[   21.715128] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[   21.716174] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[   21.717549] [drm:intel_dp_check_mst_status] got esi 01 20 00
>[   21.719329] [drm:intel_connector_check_state] [CONNECTOR:19:eDP-1]
>[   21.720056] [drm:intel_connector_check_state] [CONNECTOR:43:DP-4]
>[   21.720851] [drm:intel_connector_check_state] [CONNECTOR:64:DP-7]
>[   21.721550] [drm:check_encoder_state] [ENCODER:18:TMDS-18]
>[   21.722251] [drm:check_encoder_state] [ENCODER:26:TMDS-26]
>[   21.722951] [drm:check_encoder_state] [ENCODER:28:DP MST-28]
>[   21.723681] [drm:check_encoder_state] [ENCODER:29:DP MST-29]
>[   21.724458] [drm:check_encoder_state] [ENCODER:30:DP MST-30]
>[   21.725138] [drm:check_encoder_state] [ENCODER:33:TMDS-33]
>[   21.725805] [drm:check_encoder_state] [ENCODER:35:DP MST-35]
>[   21.726456] [drm:check_encoder_state] [ENCODER:36:DP MST-36]
>[   21.727127] [drm:check_encoder_state] [ENCODER:37:DP MST-37]
>[   21.727847] [drm:check_crtc_state] [CRTC:8]
>[   21.728489] [drm:check_crtc_state] [CRTC:12]
>[   21.729116] [drm:check_crtc_state] [CRTC:16]
>[   21.729725] [drm:check_shared_dpll_state] WRPLL 1
>[   21.730351] [drm:check_shared_dpll_state] WRPLL 2
>[   21.731473] [drm:intel_dp_destroy_mst_connector] 
>[   21.732134] [drm:drm_fb_helper_hotplug_event] 
>[   21.732752] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:19:eDP-1]
>[   21.733378] [drm:intel_dp_detect] [CONNECTOR:19:eDP-1]
>[   21.734332] [drm:edp_panel_vdd_on] Turning eDP port A VDD on
>[   21.735277] [drm:edp_panel_vdd_on] PP_STATUS: 0x80000008 PP_CONTROL: 0xabcd000f
>[   21.736223] [drm:intel_dp_probe_oui] Sink OUI: 001cf8
>[   21.737104] [drm:intel_dp_probe_oui] Branch OUI: 000000
>[   21.737652] [drm:drm_edid_to_eld] ELD: no CEA Extension found
>[   21.738178] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:19:eDP-1] probed modes :
>[   21.738719] [drm:drm_mode_debug_printmodeline] Modeline 20:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[   21.739283] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:DP-1]
>[   21.739852] [drm:intel_dp_detect] [CONNECTOR:27:DP-1]
>[   21.740465] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:DP-1] disconnected
>[   21.741077] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:31:HDMI-A-1]
>[   21.741657] [drm:intel_hdmi_detect] [CONNECTOR:31:HDMI-A-1]
>[   21.753535] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[   21.754214] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:31:HDMI-A-1] disconnected
>[   21.754816] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:34:DP-2]
>[   21.755412] [drm:intel_dp_detect] [CONNECTOR:34:DP-2]
>[   21.756007] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:34:DP-2] disconnected
>[   21.756629] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:38:HDMI-A-2]
>[   21.757279] [drm:intel_hdmi_detect] [CONNECTOR:38:HDMI-A-2]
>[   21.758142] [drm:gmbus_xfer] GMBUS [i915 gmbus dpc] NAK for addr: 0050 r(1)
>[   21.758763] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpc
>[   21.759396] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:38:HDMI-A-2] disconnected
>[   21.760049] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:39:DP-3]
>[   21.760810] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:39:DP-3] disconnected
>[   21.761460] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:43:DP-4]
>[   21.762109] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:43:DP-4] disconnected
>[   21.762772] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:50:DP-6]
>[   21.763423] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:50:DP-6] disconnected
>[   21.764113] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:64:DP-7]
>[   21.766239] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[   21.767231] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[   24.742644] [drm:edp_panel_vdd_off_sync] Turning eDP port A VDD off
>[   24.743720] [drm:edp_panel_vdd_off_sync] PP_STATUS: 0x80000008 PP_CONTROL: 0xabcd0007
>[   25.762285] [drm:drm_dp_mst_wait_tx_reply] timedout msg send ffff88030cd55c00 2 0
>[   25.769590] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.776617] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.783600] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.790319] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.797050] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.803730] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.804757] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   25.805527] ------------[ cut here ]------------
>[   25.806195] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   25.806861] fail
>[   25.807522] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   25.809962] CPU: 0 PID: 6 Comm: kworker/u16:0 Not tainted 3.18.0-00343-gfc7bddc-dirty #12
>[   25.810776] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   25.811607] Workqueue: i915-dp i915_digport_work_func [i915]
>[   25.812469]  0000000000000009 ffff88030d0db568 ffffffff814d7f92 ffff88031e20e558
>[   25.813353]  ffff88030d0db5b8 ffff88030d0db5a8 ffffffff8104e671 ffff88030d0db5b0
>[   25.814210]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   25.815076] Call Trace:
>[   25.815979]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   25.816875]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   25.817758]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   25.818646]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   25.819585]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   25.820514]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   25.821428]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   25.822399]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   25.823357]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   25.824298]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   25.825240]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   25.826214]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   25.827165]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   25.828102]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   25.829061]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   25.830023]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   25.830955]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   25.831899]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   25.832872]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   25.833825]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   25.834744]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   25.835703]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   25.836639]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   25.837555]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   25.838480]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   25.839432]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   25.840359]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   25.841268]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   25.842219]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   25.843140]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   25.844049]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   25.844953]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   25.845900]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   25.846824]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   25.847715]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   25.848604]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   25.849528]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   25.850457]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   25.851358]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   25.852291]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   25.853225]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   25.854138]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   25.855043]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   25.855972]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   25.856903] ---[ end trace a7d523cbffac9b8c ]---
>[   25.857802] [drm:process_single_tx_qlock] sideband msg failed to send
>[   25.858721] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   25.865343] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.872422] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.879498] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.886590] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.893616] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.900737] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.902161] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   25.903108] ------------[ cut here ]------------
>[   25.903989] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   25.904886] fail
>[   25.905769] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   25.908543] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   25.909472] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   25.910408] Workqueue: i915-dp i915_digport_work_func [i915]
>[   25.911303]  0000000000000009 ffff88030d0db568 ffffffff814d7f92 0000000000000007
>[   25.912246]  ffff88030d0db5b8 ffff88030d0db5a8 ffffffff8104e671 ffff88030d0db5b0
>[   25.913185]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   25.914090] Call Trace:
>[   25.914985]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   25.915917]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   25.916856]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   25.917757]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   25.918681]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   25.919605]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   25.920504]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   25.921410]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   25.922360]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   25.923285]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   25.924190]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   25.925093]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   25.926039]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   25.926969]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   25.927873]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   25.928820]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   25.929740]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   25.930653]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   25.931549]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   25.932504]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   25.933431]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   25.934341]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   25.935252]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   25.936197]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   25.937130]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   25.938033]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   25.938980]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   25.939901]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   25.940809]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   25.941716]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   25.942664]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   25.943592]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   25.944504]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   25.945459]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   25.946386]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   25.947289]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   25.948194]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   25.949127]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   25.950062]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   25.950965]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   25.951866]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   25.952799]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   25.953733]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   25.954634]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   25.955563] ---[ end trace a7d523cbffac9b8d ]---
>[   25.956487] [drm:process_single_tx_qlock] sideband msg failed to send
>[   25.957391] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   25.964007] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.971150] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.978318] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.985349] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.992530] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   25.999674] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.001093] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   26.002318] ------------[ cut here ]------------
>[   26.003271] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   26.004185] fail
>[   26.005038] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   26.007847] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   26.008779] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   26.009717] Workqueue: i915-dp i915_digport_work_func [i915]
>[   26.010614]  0000000000000009 ffff88030d0db568 ffffffff814d7f92 ffff88031e20e558
>[   26.011524]  ffff88030d0db5b8 ffff88030d0db5a8 ffffffff8104e671 ffff88030d0db5b0
>[   26.012464]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   26.013399] Call Trace:
>[   26.014292]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   26.015192]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   26.016126]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   26.017055]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   26.017960]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   26.018894]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   26.019819]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   26.020723]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   26.021628]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   26.022572]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   26.023495]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   26.024397]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   26.025319]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   26.026244]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   26.027147]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   26.028053]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   26.028996]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   26.029929]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   26.030824]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   26.031736]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   26.032682]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   26.033611]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   26.034520]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   26.035463]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   26.036393]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   26.037296]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   26.038203]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   26.039146]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   26.040073]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   26.040980]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   26.041887]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   26.042835]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   26.043767]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   26.044679]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   26.045627]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   26.046548]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   26.047451]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   26.048354]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   26.049288]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   26.050221]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   26.051121]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   26.052052]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   26.052984]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   26.053883]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   26.054781] ---[ end trace a7d523cbffac9b8e ]---
>[   26.055704] [drm:process_single_tx_qlock] sideband msg failed to send
>[   26.056638] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   26.063273] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.070402] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.077527] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.084656] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.091807] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.098945] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.100360] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   26.101555] ------------[ cut here ]------------
>[   26.102521] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   26.103440] fail
>[   26.104292] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   26.107069] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   26.107966] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   26.108912] Workqueue: i915-dp i915_digport_work_func [i915]
>[   26.109826]  0000000000000009 ffff88030d0db568 ffffffff814d7f92 ffff88031e20e558
>[   26.110736]  ffff88030d0db5b8 ffff88030d0db5a8 ffffffff8104e671 ffff88030d0db5b0
>[   26.111643]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   26.112575] Call Trace:
>[   26.113498]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   26.114398]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   26.115333]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   26.116260]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   26.117164]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   26.118069]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   26.119006]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   26.119931]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   26.120837]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   26.121738]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   26.122670]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   26.123601]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   26.124504]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   26.125450]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   26.126370]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   26.127276]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   26.128177]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   26.129130]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   26.130046]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   26.130958]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   26.131862]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   26.132809]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   26.133739]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   26.134641]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   26.135591]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   26.136510]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   26.137415]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   26.138316]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   26.139262]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   26.140186]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   26.141093]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   26.142039]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   26.142968]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   26.143879]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   26.144790]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   26.145719]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   26.146652]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   26.147555]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   26.148456]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   26.149387]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   26.150316]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   26.151219]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   26.152149]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   26.153077]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   26.153974] ---[ end trace a7d523cbffac9b8f ]---
>[   26.154867] [drm:process_single_tx_qlock] sideband msg failed to send
>[   26.155797] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   26.156739] [drm:drm_mode_debug_printmodeline] Modeline 81:"1280x1024" 75 135000 1280 1296 1440 1688 1024 1025 1028 1066 0x40 0x5
>[   26.157673] [drm:drm_mode_prune_invalid] Not using 1280x1024 mode -3
>[   26.158644] [drm:drm_mode_debug_printmodeline] Modeline 68:"1280x1024" 60 108000 1280 1328 1440 1688 1024 1025 1028 1066 0x40 0x5
>[   26.159645] [drm:drm_mode_prune_invalid] Not using 1280x1024 mode -3
>[   26.160624] [drm:drm_mode_debug_printmodeline] Modeline 70:"1152x864" 75 108000 1152 1216 1344 1600 864 865 868 900 0x40 0x5
>[   26.161635] [drm:drm_mode_prune_invalid] Not using 1152x864 mode -3
>[   26.162673] [drm:drm_mode_debug_printmodeline] Modeline 84:"1024x768" 75 78800 1024 1040 1136 1312 768 769 772 800 0x40 0x5
>[   26.163730] [drm:drm_mode_prune_invalid] Not using 1024x768 mode -3
>[   26.164740] [drm:drm_mode_debug_printmodeline] Modeline 86:"800x600" 75 49500 800 816 896 1056 600 601 604 625 0x40 0x5
>[   26.165780] [drm:drm_mode_prune_invalid] Not using 800x600 mode -3
>[   26.166785] [drm:drm_mode_debug_printmodeline] Modeline 77:"640x480" 75 31500 640 656 720 840 480 481 484 500 0x40 0xa
>[   26.167739] [drm:drm_mode_prune_invalid] Not using 640x480 mode -3
>[   26.168683] [drm:drm_mode_debug_printmodeline] Modeline 78:"640x480" 60 25200 640 656 752 800 480 490 492 525 0x40 0xa
>[   26.169637] [drm:drm_mode_prune_invalid] Not using 640x480 mode -3
>[   26.170551] [drm:drm_mode_debug_printmodeline] Modeline 79:"720x400" 70 28320 720 738 846 900 400 412 414 449 0x40 0x6
>[   26.171477] [drm:drm_mode_prune_invalid] Not using 720x400 mode -3
>[   26.172437] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:64:DP-7] probed modes :
>[   26.173396] [drm:drm_mode_debug_printmodeline] Modeline 85:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[   26.174350] [drm:drm_mode_debug_printmodeline] Modeline 75:"800x600" 60 40000 800 840 968 1056 600 601 605 628 0x40 0x5
>[   26.175329] [drm:drm_mode_debug_printmodeline] Modeline 47:"800x600" 56 36000 800 824 896 1024 600 601 603 625 0x40 0x5
>[   26.176304] [drm:drm_mode_debug_printmodeline] Modeline 51:"848x480" 60 33750 848 864 976 1088 480 486 494 517 0x40 0x5
>[   26.177250] [drm:drm_mode_debug_printmodeline] Modeline 45:"640x480" 60 25175 640 656 752 800 480 489 492 525 0x40 0xa
>[   26.178209] [drm:drm_setup_crtcs] 
>[   26.179180] [drm:drm_enable_connectors] connector 19 enabled? yes
>[   26.180157] [drm:drm_enable_connectors] connector 27 enabled? no
>[   26.181090] [drm:drm_enable_connectors] connector 31 enabled? no
>[   26.182041] [drm:drm_enable_connectors] connector 34 enabled? no
>[   26.182979] [drm:drm_enable_connectors] connector 38 enabled? no
>[   26.183880] [drm:drm_enable_connectors] connector 39 enabled? no
>[   26.184771] [drm:drm_enable_connectors] connector 43 enabled? no
>[   26.185682] [drm:drm_enable_connectors] connector 50 enabled? no
>[   26.186590] [drm:drm_enable_connectors] connector 64 enabled? yes
>[   26.187460] [drm:intel_fb_initial_config] looking for cmdline mode on connector eDP-1
>[   26.188337] [drm:intel_fb_initial_config] looking for preferred mode on connector eDP-1
>[   26.189244] [drm:intel_fb_initial_config] connector eDP-1 on pipe A [CRTC:8]: 1920x1080
>[   26.190149] [drm:intel_fb_initial_config] connector DP-1 not enabled, skipping
>[   26.191020] [drm:intel_fb_initial_config] connector HDMI-A-1 not enabled, skipping
>[   26.191886] [drm:intel_fb_initial_config] connector DP-2 not enabled, skipping
>[   26.192767] [drm:intel_fb_initial_config] connector HDMI-A-2 not enabled, skipping
>[   26.193651] [drm:intel_fb_initial_config] connector DP-3 not enabled, skipping
>[   26.194495] [drm:intel_fb_initial_config] connector DP-4 not enabled, skipping
>[   26.195354] [drm:intel_fb_initial_config] connector DP-6 not enabled, skipping
>[   26.196204] [drm:intel_fb_initial_config] looking for cmdline mode on connector DP-7
>[   26.197019] [drm:intel_fb_initial_config] looking for preferred mode on connector DP-7
>[   26.197830] [drm:intel_fb_initial_config] using first mode listed on connector DP-7
>[   26.198667] [drm:intel_fb_initial_config] connector DP-7 on pipe C [CRTC:16]: 1024x768
>[   26.199508] [drm:drm_setup_crtcs] desired mode 1920x1080 set on crtc 8
>[   26.200321] [drm:drm_setup_crtcs] desired mode 1024x768 set on crtc 16
>[   26.201133] [drm:intel_crtc_set_config] [CRTC:8] [FB:41] #connectors=1 (x y) (0 0)
>[   26.201982] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:8], mode_changed=0, fb_changed=0
>[   26.202828] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[   26.203654] [drm:intel_modeset_stage_output_state] [CONNECTOR:43:DP-4] to [CRTC:12]
>[   26.204473] [drm:intel_modeset_stage_output_state] [CONNECTOR:64:DP-7] to [CRTC:16]
>[   26.205313] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 1, prepare: 1, disable: 0
>[   26.206167] [drm:connected_sink_compute_bpp] [CONNECTOR:19:eDP-1] checking for sink bpp constrains
>[   26.206995] [drm:connected_sink_compute_bpp] clamping display bpp (was 24) to EDID reported max of 18
>[   26.207831] [drm:intel_dp_compute_config] DP link computation with max lane count 2 max bw 0a pixel clock 141000KHz
>[   26.208713] [drm:intel_dp_compute_config] DP link bw 0a lane count 2 clock 270000 bpp 18
>[   26.209594] [drm:intel_dp_compute_config] DP link bw required 253800 available 432000
>[   26.210446] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 18, dithering: 1
>[   26.211302] [drm:intel_dump_pipe_config] [CRTC:8][modeset] config for pipe A
>[   26.212189] [drm:intel_dump_pipe_config] cpu_transcoder: D
>[   26.213072] [drm:intel_dump_pipe_config] pipe bpp: 18, dithering: 1
>[   26.213921] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[   26.214784] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 4928307, gmch_n: 8388608, link_m: 273794, link_n: 524288, tu: 64
>[   26.215682] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[   26.216584] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[   26.217438] [drm:intel_dump_pipe_config] requested mode:
>[   26.218275] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[   26.219157] [drm:intel_dump_pipe_config] adjusted mode:
>[   26.220029] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[   26.220887] [drm:intel_dump_crtc_timings] crtc timings: 141000 1920 1936 1952 2104 1080 1083 1097 1116, type: 0x48 flags: 0xa
>[   26.221747] [drm:intel_dump_pipe_config] port clock: 270000
>[   26.222622] [drm:intel_dump_pipe_config] pipe src size: 1920x1080
>[   26.223486] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[   26.224328] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[   26.225162] [drm:intel_dump_pipe_config] ips: 1
>[   26.226007] [drm:intel_dump_pipe_config] double wide: 0
>[   26.226843] [drm:intel_crtc_set_config] [CRTC:12] [NOFB]
>[   26.227636] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:12], mode_changed=1, fb_changed=0
>[   26.228442] [drm:intel_modeset_stage_output_state] [CONNECTOR:43:DP-4] to [NOCRTC]
>[   26.229273] [drm:intel_modeset_stage_output_state] encoder changed, full mode switch
>[   26.230094] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[   26.230874] [drm:intel_modeset_stage_output_state] [CONNECTOR:64:DP-7] to [CRTC:16]
>[   26.231637] [drm:intel_modeset_stage_output_state] crtc changed, full mode switch
>[   26.232424] [drm:intel_modeset_stage_output_state] crtc disabled, full mode switch
>[   26.233213] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 0, prepare: 0, disable: 2
>[   26.238779] [drm:intel_mst_disable_dp] 2
>[   26.258646] [drm:intel_mst_post_disable_dp] 2
>[   26.260211] [drm:drm_dp_update_payload_part2] payload 0 2
>[   26.261178] [drm:drm_dp_update_payload_part2] payload 1 2
>[   26.262052] [drm:intel_connector_check_state] [CONNECTOR:19:eDP-1]
>[   26.262850] [drm:intel_connector_check_state] [CONNECTOR:64:DP-7]
>[   26.263609] [drm:check_encoder_state] [ENCODER:18:TMDS-18]
>[   26.264377] [drm:check_encoder_state] [ENCODER:26:TMDS-26]
>[   26.265146] [drm:check_encoder_state] [ENCODER:28:DP MST-28]
>[   26.265948] [drm:check_encoder_state] [ENCODER:29:DP MST-29]
>[   26.266751] [drm:check_encoder_state] [ENCODER:30:DP MST-30]
>[   26.267521] [drm:check_encoder_state] [ENCODER:33:TMDS-33]
>[   26.268282] [drm:check_encoder_state] [ENCODER:35:DP MST-35]
>[   26.269068] [drm:check_encoder_state] [ENCODER:36:DP MST-36]
>[   26.269845] [drm:check_encoder_state] [ENCODER:37:DP MST-37]
>[   26.270583] [drm:check_crtc_state] [CRTC:8]
>[   26.271330] [drm:check_crtc_state] [CRTC:12]
>[   26.272105] [drm:check_crtc_state] [CRTC:16]
>[   26.272859] [drm:check_shared_dpll_state] WRPLL 1
>[   26.273586] [drm:check_shared_dpll_state] WRPLL 2
>[   26.274315] [drm:intel_crtc_set_config] [CRTC:16] [FB:41] #connectors=1 (x y) (0 0)
>[   26.275063] [drm:intel_set_config_compute_mode_changes] modes are different, full mode set
>[   26.275845] [drm:drm_mode_debug_printmodeline] Modeline 67:"1280x1024" 75 135000 1280 1296 1440 1688 1024 1025 1028 1066 0x40 0x5
>[   26.276656] [drm:drm_mode_debug_printmodeline] Modeline 49:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[   26.277437] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:16], mode_changed=1, fb_changed=0
>[   26.278229] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[   26.279050] [drm:intel_modeset_stage_output_state] [CONNECTOR:64:DP-7] to [CRTC:16]
>[   26.279871] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 4, prepare: 4, disable: 0
>[   26.280666] [drm:connected_sink_compute_bpp] [CONNECTOR:64:DP-7] checking for sink bpp constrains
>[   26.281459] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 24, dithering: 0
>[   26.282276] [drm:intel_dump_pipe_config] [CRTC:16][modeset] config for pipe C
>[   26.283101] [drm:intel_dump_pipe_config] cpu_transcoder: C
>[   26.283896] [drm:intel_dump_pipe_config] pipe bpp: 24, dithering: 0
>[   26.284684] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[   26.285508] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 757304, gmch_n: 8388608, link_m: 126217, link_n: 1048576, tu: 6
>[   26.286340] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[   26.287131] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[   26.287912] [drm:intel_dump_pipe_config] requested mode:
>[   26.288720] [drm:drm_mode_debug_printmodeline] Modeline 0:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[   26.289550] [drm:intel_dump_pipe_config] adjusted mode:
>[   26.290343] [drm:drm_mode_debug_printmodeline] Modeline 0:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[   26.291164] [drm:intel_dump_crtc_timings] crtc timings: 65000 1024 1048 1184 1344 768 771 777 806, type: 0x40 flags: 0xa
>[   26.292029] [drm:intel_dump_pipe_config] port clock: 540000
>[   26.292886] [drm:intel_dump_pipe_config] pipe src size: 1024x768
>[   26.293702] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[   26.294531] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[   26.295385] [drm:intel_dump_pipe_config] ips: 0
>[   26.296239] [drm:intel_dump_pipe_config] double wide: 0
>[   26.301960] [drm:intel_mst_disable_dp] 1
>[   26.303202] [drm:drm_dp_destroy_payload_step1] 
>[   26.310250] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.316993] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.323705] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.330403] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.337085] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.343748] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.344849] [drm:drm_dp_send_sideband_msg] failed to dpcd write 9 -5
>[   26.345653] ------------[ cut here ]------------
>[   26.346395] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   26.347126] fail
>[   26.347837] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   26.350437] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   26.351301] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   26.352228] Workqueue: i915-dp i915_digport_work_func [i915]
>[   26.353118]  0000000000000009 ffff88030d0db4e8 ffffffff814d7f92 ffff88031e20e558
>[   26.353995]  ffff88030d0db538 ffff88030d0db528 ffffffff8104e671 ffff88030d0db530
>[   26.354874]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 0000000000000009
>[   26.355787] Call Trace:
>[   26.356701]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   26.357587]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   26.358480]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   26.359408]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   26.360332]  [<ffffffff810978a1>] ? lockdep_count_forward_deps+0x21/0xd0
>[   26.361245]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   26.362210]  [<ffffffffa03d6eb0>] ? build_allocate_payload+0x40/0x50 [drm_kms_helper]
>[   26.363164]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   26.364111]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   26.365065]  [<ffffffffa03d96a1>] drm_dp_payload_send_msg.isra.13+0x81/0xe0 [drm_kms_helper]
>[   26.366074]  [<ffffffffa03d9877>] drm_dp_update_payload_part1+0x177/0x360 [drm_kms_helper]
>[   26.367082]  [<ffffffffa053a1de>] intel_mst_disable_dp+0x3e/0x80 [i915]
>[   26.368069]  [<ffffffffa051299b>] haswell_crtc_disable+0x1cb/0x3a0 [i915]
>[   26.369104]  [<ffffffffa05136cc>] __intel_set_mode+0x98c/0xb50 [i915]
>[   26.370126]  [<ffffffffa051a32f>] intel_crtc_set_config+0xc7f/0x1040 [i915]
>[   26.371134]  [<ffffffffa03870ed>] ? drm_modeset_lock+0x3d/0x110 [drm]
>[   26.372190]  [<ffffffffa0377f69>] drm_mode_set_config_internal+0x69/0x120 [drm]
>[   26.373218]  [<ffffffffa03de603>] restore_fbdev_mode+0xd3/0x100 [drm_kms_helper]
>[   26.374226]  [<ffffffffa03de653>] drm_fb_helper_restore_fbdev_mode_unlocked+0x23/0x40 [drm_kms_helper]
>[   26.375272]  [<ffffffffa03e0438>] drm_fb_helper_set_par+0x28/0x70 [drm_kms_helper]
>[   26.376288]  [<ffffffffa03e03c1>] drm_fb_helper_hotplug_event+0x91/0xe0 [drm_kms_helper]
>[   26.377281]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   26.378260]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   26.379295]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   26.380299]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   26.381277]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   26.382289]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   26.383280]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   26.384254]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   26.385274]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   26.386269]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   26.387244]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   26.388216]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   26.389222]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   26.390207]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   26.391159]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   26.392138]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   26.393079]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   26.393987]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   26.394881]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   26.395811]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   26.396736]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   26.397621]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   26.398525] ---[ end trace a7d523cbffac9b90 ]---
>[   26.399432] [drm:process_single_tx_qlock] sideband msg failed to send
>[   26.400330] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   26.401886] [drm:drm_dp_update_payload_part1] removing payload 1
>[   26.408548] [drm:intel_mst_post_disable_dp] 1
>[   26.410155] [drm:drm_dp_update_payload_part2] payload 0 2
>[   26.411176] [drm:drm_dp_mst_put_payload_id] putting payload 2
>[   26.412511] [drm:intel_update_fbc] disabled per chip default
>[   26.413494] [drm:intel_mst_pre_enable_dp] 0
>[   26.422455] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.424031] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[   26.441845] [drm:intel_dp_start_link_train] clock recovery OK
>[   26.465230] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training successful
>[   26.466877] [drm:drm_dp_mst_allocate_vcpi] initing vcpi for 233 6
>[   26.468490] [drm:intel_mst_enable_dp] 1
>[   26.469542] [drm:drm_dp_update_payload_part2] payload 0 2
>[   26.470361] [drm:drm_dp_update_payload_part2] payload 1 1
>[   26.476757] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.483424] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.490083] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.496746] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.503412] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.510074] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.511211] [drm:drm_dp_send_sideband_msg] failed to dpcd write 9 -5
>[   26.512203] ------------[ cut here ]------------
>[   26.513023] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   26.513809] fail
>[   26.514558] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   26.517238] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   26.518118] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   26.519053] Workqueue: i915-dp i915_digport_work_func [i915]
>[   26.519956]  0000000000000009 ffff88030d0db4c8 ffffffff814d7f92 ffff88031e20e558
>[   26.520847]  ffff88030d0db518 ffff88030d0db508 ffffffff8104e671 ffff88030d0db510
>[   26.521734]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 0000000000000009
>[   26.522653] Call Trace:
>[   26.523562]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   26.524445]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   26.525354]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   26.526260]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   26.527141]  [<ffffffff8109788b>] ? lockdep_count_forward_deps+0xb/0xd0
>[   26.528019]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   26.528939]  [<ffffffffa03d6eb0>] ? build_allocate_payload+0x40/0x50 [drm_kms_helper]
>[   26.529840]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   26.530722]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   26.531602]  [<ffffffffa03d96a1>] drm_dp_payload_send_msg.isra.13+0x81/0xe0 [drm_kms_helper]
>[   26.532525]  [<ffffffffa03d9b44>] drm_dp_update_payload_part2+0xe4/0x160 [drm_kms_helper]
>[   26.533434]  [<ffffffffa0539ed5>] intel_mst_enable_dp+0xe5/0x110 [i915]
>[   26.534322]  [<ffffffffa051663b>] haswell_crtc_enable+0x5eb/0xad0 [i915]
>[   26.535248]  [<ffffffffa0513562>] __intel_set_mode+0x822/0xb50 [i915]
>[   26.536148]  [<ffffffffa051a32f>] intel_crtc_set_config+0xc7f/0x1040 [i915]
>[   26.537028]  [<ffffffffa03870ed>] ? drm_modeset_lock+0x3d/0x110 [drm]
>[   26.537904]  [<ffffffffa0377f69>] drm_mode_set_config_internal+0x69/0x120 [drm]
>[   26.538822]  [<ffffffffa03de603>] restore_fbdev_mode+0xd3/0x100 [drm_kms_helper]
>[   26.539720]  [<ffffffffa03de653>] drm_fb_helper_restore_fbdev_mode_unlocked+0x23/0x40 [drm_kms_helper]
>[   26.540608]  [<ffffffffa03e0438>] drm_fb_helper_set_par+0x28/0x70 [drm_kms_helper]
>[   26.541494]  [<ffffffffa03e03c1>] drm_fb_helper_hotplug_event+0x91/0xe0 [drm_kms_helper]
>[   26.542429]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   26.543339]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   26.544437]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   26.545494]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   26.546422]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   26.547331]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   26.548247]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   26.549206]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   26.550146]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   26.551064]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   26.552025]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   26.552966]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   26.553882]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   26.554792]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   26.555730]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   26.556670]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   26.557575]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   26.558506]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   26.559431]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   26.560327]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   26.561223]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   26.562141]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   26.563058] ---[ end trace a7d523cbffac9b91 ]---
>[   26.563942] [drm:process_single_tx_qlock] sideband msg failed to send
>[   26.564833] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   26.604863] [drm:ironlake_update_primary_plane] Writing base 00191000 00000000 0 0 7680
>[   26.606334] [drm:intel_update_fbc] more than one pipe active, disabling compression
>[   26.607295] [drm:intel_connector_check_state] [CONNECTOR:19:eDP-1]
>[   26.608235] [drm:intel_connector_check_state] [CONNECTOR:64:DP-7]
>[   26.609201] [drm:check_encoder_state] [ENCODER:18:TMDS-18]
>[   26.610237] [drm:check_encoder_state] [ENCODER:26:TMDS-26]
>[   26.611180] [drm:check_encoder_state] [ENCODER:28:DP MST-28]
>[   26.612149] [drm:check_encoder_state] [ENCODER:29:DP MST-29]
>[   26.613132] [drm:check_encoder_state] [ENCODER:30:DP MST-30]
>[   26.614032] [drm:check_encoder_state] [ENCODER:33:TMDS-33]
>[   26.614911] [drm:check_encoder_state] [ENCODER:35:DP MST-35]
>[   26.615776] [drm:check_encoder_state] [ENCODER:36:DP MST-36]
>[   26.616632] [drm:check_encoder_state] [ENCODER:37:DP MST-37]
>[   26.617372] [drm:check_crtc_state] [CRTC:8]
>[   26.618108] [drm:check_crtc_state] [CRTC:12]
>[   26.618853] [drm:check_crtc_state] [CRTC:16]
>[   26.619622] [drm:check_shared_dpll_state] WRPLL 1
>[   26.620309] [drm:check_shared_dpll_state] WRPLL 2
>[   26.621111] [drm:intel_dp_destroy_mst_connector] 
>[   26.622110] [drm:drm_dp_mst_put_payload_id] putting payload 1
>[   26.622821] [drm:drm_fb_helper_hotplug_event] 
>[   26.623574] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:19:eDP-1]
>[   26.624258] [drm:intel_dp_detect] [CONNECTOR:19:eDP-1]
>[   26.624954] [drm:edp_panel_vdd_on] Turning eDP port A VDD on
>[   26.625681] [drm:edp_panel_vdd_on] PP_STATUS: 0x80000008 PP_CONTROL: 0xabcd000f
>[   26.626838] [drm:intel_dp_probe_oui] Sink OUI: 001cf8
>[   26.627887] [drm:intel_dp_probe_oui] Branch OUI: 000000
>[   26.628666] [drm:drm_edid_to_eld] ELD: no CEA Extension found
>[   26.629352] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:19:eDP-1] probed modes :
>[   26.630040] [drm:drm_mode_debug_printmodeline] Modeline 20:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[   26.630744] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:DP-1]
>[   26.631448] [drm:intel_dp_detect] [CONNECTOR:27:DP-1]
>[   26.632186] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:DP-1] disconnected
>[   26.633006] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:31:HDMI-A-1]
>[   26.633717] [drm:intel_hdmi_detect] [CONNECTOR:31:HDMI-A-1]
>[   26.645099] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[   26.645937] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:31:HDMI-A-1] disconnected
>[   26.646699] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:34:DP-2]
>[   26.647421] [drm:intel_dp_detect] [CONNECTOR:34:DP-2]
>[   26.648136] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:34:DP-2] disconnected
>[   26.648896] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:38:HDMI-A-2]
>[   26.649720] [drm:intel_hdmi_detect] [CONNECTOR:38:HDMI-A-2]
>[   26.650662] [drm:gmbus_xfer] GMBUS [i915 gmbus dpc] NAK for addr: 0050 r(1)
>[   26.651385] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpc
>[   26.652148] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:38:HDMI-A-2] disconnected
>[   26.652954] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:39:DP-3]
>[   26.653685] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:39:DP-3] disconnected
>[   26.654407] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:50:DP-6]
>[   26.655153] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:50:DP-6] disconnected
>[   26.655928] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:64:DP-7]
>[   26.662363] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.669210] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.675916] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.682580] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.689245] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.695906] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   26.696932] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   26.697823] ------------[ cut here ]------------
>[   26.698628] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   26.699368] fail
>[   26.700054] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   26.702550] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   26.703395] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   26.704236] Workqueue: i915-dp i915_digport_work_func [i915]
>[   26.705098]  0000000000000009 ffff88030d0db568 ffffffff814d7f92 ffff88031e20e558
>[   26.705969]  ffff88030d0db5b8 ffff88030d0db5a8 ffffffff8104e671 ffff88030d0db5b0
>[   26.706802]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   26.707632] Call Trace:
>[   26.708500]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   26.709355]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   26.710196]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   26.711040]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   26.711944]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   26.712833]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   26.713707]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   26.714599]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   26.715540]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   26.716469]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   26.717377]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   26.718291]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   26.719257]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   26.720213]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   26.721151]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   26.722139]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   26.723099]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   26.724054]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   26.724998]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   26.725991]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   26.726963]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   26.727919]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   26.728918]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   26.729895]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   26.730867]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   26.731866]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   26.732832]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   26.733767]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   26.734701]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   26.735668]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   26.736623]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   26.737552]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   26.738521]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   26.739462]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   26.740385]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   26.741297]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   26.742229]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   26.743166]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   26.744060]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   26.744948]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   26.745854]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   26.746757]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   26.747633]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   26.748539]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   26.749454] ---[ end trace a7d523cbffac9b92 ]---
>[   26.750345] [drm:process_single_tx_qlock] sideband msg failed to send
>[   26.751248] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   26.753489] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[   26.754881] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[   29.627429] [drm:edp_panel_vdd_off_sync] Turning eDP port A VDD off
>[   29.628899] [drm:edp_panel_vdd_off_sync] PP_STATUS: 0x80000008 PP_CONTROL: 0xabcd0007
>[   30.750355] [drm:drm_dp_mst_wait_tx_reply] timedout msg send ffff8800c99da400 2 0
>[   30.757799] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.765129] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.772297] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.779408] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.786499] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.793537] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.794738] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   30.795506] ------------[ cut here ]------------
>[   30.796271] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   30.797083] fail
>[   30.797884] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   30.800608] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   30.801525] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   30.802444] Workqueue: i915-dp i915_digport_work_func [i915]
>[   30.803355]  0000000000000009 ffff88030d0db568 ffffffff814d7f92 ffff88031e20e558
>[   30.804315]  ffff88030d0db5b8 ffff88030d0db5a8 ffffffff8104e671 ffff88030d0db5b0
>[   30.805269]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   30.806190] Call Trace:
>[   30.807140]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   30.808069]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   30.808975]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   30.809878]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   30.810829]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   30.811761]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   30.812671]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   30.813634]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   30.814576]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   30.815496]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   30.816414]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   30.817368]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   30.818305]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   30.819218]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   30.820125]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   30.821073]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   30.821993]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   30.822901]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   30.823840]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   30.824768]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   30.825674]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   30.826586]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   30.827541]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   30.828470]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   30.829388]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   30.830340]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   30.831273]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   30.832184]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   30.833102]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   30.834063]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   30.835004]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   30.835928]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   30.836859]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   30.837834]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   30.838789]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   30.839720]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   30.840680]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   30.841638]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   30.842563]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   30.843481]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   30.844423]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   30.845368]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   30.846275]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   30.847205]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   30.848136] ---[ end trace a7d523cbffac9b93 ]---
>[   30.849088] [drm:process_single_tx_qlock] sideband msg failed to send
>[   30.850012] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   30.856660] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.863780] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.870929] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.878072] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.885143] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.892263] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.893687] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   30.894644] ------------[ cut here ]------------
>[   30.895526] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   30.896423] fail
>[   30.897304] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   30.900076] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   30.901003] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   30.901936] Workqueue: i915-dp i915_digport_work_func [i915]
>[   30.902829]  0000000000000009 ffff88030d0db568 ffffffff814d7f92 0000000000000007
>[   30.903767]  ffff88030d0db5b8 ffff88030d0db5a8 ffffffff8104e671 ffff88030d0db5b0
>[   30.904703]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   30.905604] Call Trace:
>[   30.906498]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   30.907428]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   30.908364]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   30.909264]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   30.910168]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   30.911111]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   30.912029]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   30.912933]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   30.913877]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   30.914798]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   30.915700]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   30.916599]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   30.917544]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   30.918471]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   30.919373]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   30.920320]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   30.921239]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   30.922150]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   30.923046]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   30.923998]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   30.924924]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   30.925830]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   30.926739]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   30.927682]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   30.928614]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   30.929516]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   30.930461]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   30.931382]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   30.932287]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   30.933193]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   30.934136]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   30.935064]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   30.935975]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   30.936930]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   30.937855]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   30.938757]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   30.939660]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   30.940602]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   30.941526]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   30.942427]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   30.943325]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   30.944256]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   30.945189]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   30.946089]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   30.947017] ---[ end trace a7d523cbffac9b94 ]---
>[   30.947940] [drm:process_single_tx_qlock] sideband msg failed to send
>[   30.948842] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   30.955451] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.962552] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.969642] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.976662] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.983731] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.990829] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   30.992235] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   30.993339] ------------[ cut here ]------------
>[   30.994294] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   30.995215] fail
>[   30.996066] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   30.998865] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   30.999764] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   31.000712] Workqueue: i915-dp i915_digport_work_func [i915]
>[   31.001628]  0000000000000009 ffff88030d0db568 ffffffff814d7f92 ffff88031e20e558
>[   31.002539]  ffff88030d0db5b8 ffff88030d0db5a8 ffffffff8104e671 ffff88030d0db5b0
>[   31.003445]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   31.004379] Call Trace:
>[   31.005303]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   31.006203]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   31.007138]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   31.008066]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   31.008971]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   31.009873]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   31.010812]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   31.011737]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   31.012643]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   31.013575]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   31.014507]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   31.015407]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   31.016311]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   31.017257]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   31.018199]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   31.019105]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   31.020005]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   31.020957]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   31.021872]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   31.022783]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   31.023729]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   31.024654]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   31.025563]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   31.026464]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   31.027415]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   31.028336]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   31.029240]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   31.030141]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   31.031087]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   31.032012]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   31.032916]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   31.033862]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   31.034790]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   31.035701]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   31.036608]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   31.037538]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   31.038471]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   31.039372]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   31.040302]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   31.041232]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   31.042129]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   31.043029]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   31.043960]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   31.044889]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   31.045785] ---[ end trace a7d523cbffac9b95 ]---
>[   31.046676] [drm:process_single_tx_qlock] sideband msg failed to send
>[   31.047605] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   31.048547] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:64:DP-7] probed modes :
>[   31.049470] [drm:drm_mode_debug_printmodeline] Modeline 85:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[   31.050448] [drm:drm_mode_debug_printmodeline] Modeline 75:"800x600" 60 40000 800 840 968 1056 600 601 605 628 0x40 0x5
>[   31.051437] [drm:drm_mode_debug_printmodeline] Modeline 47:"800x600" 56 36000 800 824 896 1024 600 601 603 625 0x40 0x5
>[   31.052400] [drm:drm_mode_debug_printmodeline] Modeline 51:"848x480" 60 33750 848 864 976 1088 480 486 494 517 0x40 0x5
>[   31.053372] [drm:drm_mode_debug_printmodeline] Modeline 45:"640x480" 60 25175 640 656 752 800 480 489 492 525 0x40 0xa
>[   31.054390] [drm:drm_setup_crtcs] 
>[   31.055373] [drm:drm_enable_connectors] connector 19 enabled? yes
>[   31.056325] [drm:drm_enable_connectors] connector 27 enabled? no
>[   31.057282] [drm:drm_enable_connectors] connector 31 enabled? no
>[   31.058195] [drm:drm_enable_connectors] connector 34 enabled? no
>[   31.059030] [drm:drm_enable_connectors] connector 38 enabled? no
>[   31.059818] [drm:drm_enable_connectors] connector 39 enabled? no
>[   31.060618] [drm:drm_enable_connectors] connector 50 enabled? no
>[   31.061401] [drm:drm_enable_connectors] connector 64 enabled? yes
>[   31.062138] [drm:intel_fb_initial_config] looking for cmdline mode on connector eDP-1
>[   31.062880] [drm:intel_fb_initial_config] looking for preferred mode on connector eDP-1
>[   31.063652] [drm:intel_fb_initial_config] connector eDP-1 on pipe A [CRTC:8]: 1920x1080
>[   31.064425] [drm:intel_fb_initial_config] connector DP-1 not enabled, skipping
>[   31.065156] [drm:intel_fb_initial_config] connector HDMI-A-1 not enabled, skipping
>[   31.065887] [drm:intel_fb_initial_config] connector DP-2 not enabled, skipping
>[   31.066616] [drm:intel_fb_initial_config] connector HDMI-A-2 not enabled, skipping
>[   31.067376] [drm:intel_fb_initial_config] connector DP-3 not enabled, skipping
>[   31.068134] [drm:intel_fb_initial_config] connector DP-6 not enabled, skipping
>[   31.068848] [drm:intel_fb_initial_config] looking for cmdline mode on connector DP-7
>[   31.069561] [drm:intel_fb_initial_config] looking for preferred mode on connector DP-7
>[   31.070296] [drm:intel_fb_initial_config] using first mode listed on connector DP-7
>[   31.071029] [drm:intel_fb_initial_config] connector DP-7 on pipe C [CRTC:16]: 1024x768
>[   31.071731] [drm:drm_setup_crtcs] desired mode 1920x1080 set on crtc 8
>[   31.072435] [drm:drm_setup_crtcs] desired mode 1024x768 set on crtc 16
>[   31.073144] [drm:intel_crtc_set_config] [CRTC:8] [FB:41] #connectors=1 (x y) (0 0)
>[   31.073883] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:8], mode_changed=0, fb_changed=0
>[   31.074639] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[   31.075365] [drm:intel_modeset_stage_output_state] [CONNECTOR:64:DP-7] to [CRTC:16]
>[   31.076088] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 1, prepare: 1, disable: 0
>[   31.076838] [drm:connected_sink_compute_bpp] [CONNECTOR:19:eDP-1] checking for sink bpp constrains
>[   31.077596] [drm:connected_sink_compute_bpp] clamping display bpp (was 24) to EDID reported max of 18
>[   31.078334] [drm:intel_dp_compute_config] DP link computation with max lane count 2 max bw 0a pixel clock 141000KHz
>[   31.079076] [drm:intel_dp_compute_config] DP link bw 0a lane count 2 clock 270000 bpp 18
>[   31.079818] [drm:intel_dp_compute_config] DP link bw required 253800 available 432000
>[   31.080582] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 18, dithering: 1
>[   31.081349] [drm:intel_dump_pipe_config] [CRTC:8][modeset] config for pipe A
>[   31.082081] [drm:intel_dump_pipe_config] cpu_transcoder: D
>[   31.082803] [drm:intel_dump_pipe_config] pipe bpp: 18, dithering: 1
>[   31.083549] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[   31.084310] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 4928307, gmch_n: 8388608, link_m: 273794, link_n: 524288, tu: 64
>[   31.085049] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[   31.085786] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[   31.086514] [drm:intel_dump_pipe_config] requested mode:
>[   31.087265] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[   31.088046] [drm:intel_dump_pipe_config] adjusted mode:
>[   31.088791] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[   31.089562] [drm:intel_dump_crtc_timings] crtc timings: 141000 1920 1936 1952 2104 1080 1083 1097 1116, type: 0x48 flags: 0xa
>[   31.090377] [drm:intel_dump_pipe_config] port clock: 270000
>[   31.091188] [drm:intel_dump_pipe_config] pipe src size: 1920x1080
>[   31.091965] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[   31.092761] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[   31.093590] [drm:intel_dump_pipe_config] ips: 1
>[   31.094416] [drm:intel_dump_pipe_config] double wide: 0
>[   31.095211] [drm:intel_crtc_set_config] [CRTC:12] [NOFB]
>[   31.096004] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:12], mode_changed=0, fb_changed=0
>[   31.096850] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[   31.097700] [drm:intel_modeset_stage_output_state] [CONNECTOR:64:DP-7] to [CRTC:16]
>[   31.098515] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 0, prepare: 0, disable: 0
>[   31.099338] [drm:intel_crtc_set_config] [CRTC:16] [FB:41] #connectors=1 (x y) (0 0)
>[   31.100190] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:16], mode_changed=0, fb_changed=0
>[   31.101062] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[   31.101898] [drm:intel_modeset_stage_output_state] [CONNECTOR:64:DP-7] to [CRTC:16]
>[   31.102717] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 4, prepare: 4, disable: 0
>[   31.103572] [drm:connected_sink_compute_bpp] [CONNECTOR:64:DP-7] checking for sink bpp constrains
>[   31.104440] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 24, dithering: 0
>[   31.105282] [drm:intel_dump_pipe_config] [CRTC:16][modeset] config for pipe C
>[   31.106123] [drm:intel_dump_pipe_config] cpu_transcoder: C
>[   31.106978] [drm:intel_dump_pipe_config] pipe bpp: 24, dithering: 0
>[   31.107834] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[   31.108682] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 757304, gmch_n: 8388608, link_m: 126217, link_n: 1048576, tu: 6
>[   31.109545] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[   31.110448] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[   31.111356] [drm:intel_dump_pipe_config] requested mode:
>[   31.112237] [drm:drm_mode_debug_printmodeline] Modeline 0:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[   31.113151] [drm:intel_dump_pipe_config] adjusted mode:
>[   31.114101] [drm:drm_mode_debug_printmodeline] Modeline 0:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[   31.115073] [drm:intel_dump_crtc_timings] crtc timings: 65000 1024 1048 1184 1344 768 771 777 806, type: 0x40 flags: 0xa
>[   31.116027] [drm:intel_dump_pipe_config] port clock: 540000
>[   31.117005] [drm:intel_dump_pipe_config] pipe src size: 1024x768
>[   31.117983] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[   31.118951] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[   31.119923] [drm:intel_dump_pipe_config] ips: 0
>[   31.120919] [drm:intel_dump_pipe_config] double wide: 0
>[   31.121936] [drm:drm_fb_helper_hotplug_event] 
>[   31.123015] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:19:eDP-1]
>[   31.124049] [drm:intel_dp_detect] [CONNECTOR:19:eDP-1]
>[   31.125071] [drm:edp_panel_vdd_on] Turning eDP port A VDD on
>[   31.126065] [drm:edp_panel_vdd_on] PP_STATUS: 0x80000008 PP_CONTROL: 0xabcd000f
>[   31.127423] [drm:intel_dp_probe_oui] Sink OUI: 001cf8
>[   31.128739] [drm:intel_dp_probe_oui] Branch OUI: 000000
>[   31.129742] [drm:drm_edid_to_eld] ELD: no CEA Extension found
>[   31.130769] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:19:eDP-1] probed modes :
>[   31.131779] [drm:drm_mode_debug_printmodeline] Modeline 20:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[   31.132777] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:DP-1]
>[   31.133814] [drm:intel_dp_detect] [CONNECTOR:27:DP-1]
>[   31.134845] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:DP-1] disconnected
>[   31.135854] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:31:HDMI-A-1]
>[   31.136885] [drm:intel_hdmi_detect] [CONNECTOR:31:HDMI-A-1]
>[   31.150143] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[   31.151404] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:31:HDMI-A-1] disconnected
>[   31.152438] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:34:DP-2]
>[   31.153452] [drm:intel_dp_detect] [CONNECTOR:34:DP-2]
>[   31.154468] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:34:DP-2] disconnected
>[   31.155482] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:38:HDMI-A-2]
>[   31.156494] [drm:intel_hdmi_detect] [CONNECTOR:38:HDMI-A-2]
>[   31.157732] [drm:gmbus_xfer] GMBUS [i915 gmbus dpc] NAK for addr: 0050 r(1)
>[   31.158738] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpc
>[   31.159748] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:38:HDMI-A-2] disconnected
>[   31.160807] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:39:DP-3]
>[   31.161842] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:39:DP-3] disconnected
>[   31.162840] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:50:DP-6]
>[   31.163848] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:50:DP-6] disconnected
>[   31.164836] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:64:DP-7]
>[   31.171549] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.178710] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.185902] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.193048] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.200080] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.207186] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.208573] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   31.209495] ------------[ cut here ]------------
>[   31.210411] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   31.211329] fail
>[   31.212220] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   31.215303] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   31.216304] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   31.217365] Workqueue: i915-dp i915_digport_work_func [i915]
>[   31.218392]  0000000000000009 ffff88030d0db568 ffffffff814d7f92 ffff88031e20e558
>[   31.219405]  ffff88030d0db5b8 ffff88030d0db5a8 ffffffff8104e671 ffff88030d0db5b0
>[   31.220440]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   31.221471] Call Trace:
>[   31.222464]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   31.223494]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   31.224520]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   31.225506]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   31.226497]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   31.227514]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   31.228536]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   31.229526]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   31.230547]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   31.231534]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   31.232487]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   31.233450]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   31.234419]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   31.235366]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   31.236304]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   31.237284]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   31.238247]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   31.239202]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   31.240187]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   31.241159]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   31.242112]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   31.243070]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   31.244070]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   31.245050]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   31.246023]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   31.247022]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   31.247989]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   31.248922]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   31.249857]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   31.250825]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   31.251779]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   31.252707]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   31.253676]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   31.254615]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   31.255537]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   31.256447]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   31.257375]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   31.258310]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   31.259203]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   31.260120]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   31.261026]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   31.261898]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   31.262772]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   31.263679]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   31.264594] ---[ end trace a7d523cbffac9b96 ]---
>[   31.265485] [drm:process_single_tx_qlock] sideband msg failed to send
>[   31.266389] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   31.273023] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.280044] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.287125] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.294207] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.301308] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.308387] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.309808] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   31.310736] ------------[ cut here ]------------
>[   31.311648] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   31.312546] fail
>[   31.313419] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   31.316198] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   31.317128] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   31.318062] Workqueue: i915-dp i915_digport_work_func [i915]
>[   31.318956]  0000000000000009 ffff88030d0db568 ffffffff814d7f92 0000000000000007
>[   31.319867]  ffff88030d0db5b8 ffff88030d0db5a8 ffffffff8104e671 ffff88030d0db5b0
>[   31.320806]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   31.321742] Call Trace:
>[   31.322635]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   31.323564]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   31.324500]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   31.325400]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   31.326306]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   31.327239]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   31.328168]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   31.329073]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   31.329979]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   31.330931]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   31.331854]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   31.332755]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   31.333699]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   31.334626]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   31.335529]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   31.336435]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   31.337378]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   31.338310]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   31.339207]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   31.340160]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   31.341085]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   31.341996]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   31.342906]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   31.343849]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   31.344781]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   31.345684]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   31.346591]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   31.347536]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   31.348464]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   31.349371]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   31.350318]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   31.351245]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   31.352157]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   31.353071]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   31.354022]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   31.354946]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   31.355849]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   31.356783]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   31.357716]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   31.358619]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   31.359518]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   31.360451]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   31.361385]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   31.362286]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   31.363185] ---[ end trace a7d523cbffac9b97 ]---
>[   31.364109] [drm:process_single_tx_qlock] sideband msg failed to send
>[   31.365043] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   31.371632] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.378757] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.385856] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.393018] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.400075] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.407246] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.408666] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   31.409657] ------------[ cut here ]------------
>[   31.410582] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   31.411503] fail
>[   31.412356] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   31.415136] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   31.416037] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   31.416983] Workqueue: i915-dp i915_digport_work_func [i915]
>[   31.417900]  0000000000000009 ffff88030d0db568 ffffffff814d7f92 ffff88031e20e558
>[   31.418810]  ffff88030d0db5b8 ffff88030d0db5a8 ffffffff8104e671 ffff88030d0db5b0
>[   31.419717]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   31.420651] Call Trace:
>[   31.421575]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   31.422476]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   31.423410]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   31.424338]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   31.425242]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   31.426145]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   31.427084]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   31.428010]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   31.428916]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   31.429818]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   31.430752]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   31.431683]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   31.432588]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   31.433533]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   31.434454]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   31.435360]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   31.436262]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   31.437216]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   31.438133]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   31.439045]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   31.439950]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   31.440898]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   31.441829]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   31.442732]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   31.443684]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   31.444605]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   31.445512]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   31.446413]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   31.447361]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   31.448287]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   31.449193]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   31.450141]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   31.451070]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   31.451984]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   31.452893]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   31.453825]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   31.454759]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   31.455663]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   31.456566]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   31.457499]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   31.458430]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   31.459332]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   31.460264]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   31.461192]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   31.462090] ---[ end trace a7d523cbffac9b98 ]---
>[   31.462985] [drm:process_single_tx_qlock] sideband msg failed to send
>[   31.463916] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   31.470625] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.477753] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.484893] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.492015] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.499150] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.506287] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.507715] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   31.508698] ------------[ cut here ]------------
>[   31.509581] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   31.510513] fail
>[   31.511398] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   31.514171] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   31.515097] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   31.516003] Workqueue: i915-dp i915_digport_work_func [i915]
>[   31.517041]  0000000000000009 ffff88030d0db568 ffffffff814d7f92 ffff88031e20e558
>[   31.517982]  ffff88030d0db5b8 ffff88030d0db5a8 ffffffff8104e671 ffff88030d0db5b0
>[   31.518889]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   31.519792] Call Trace:
>[   31.520728]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   31.521649]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   31.522555]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   31.523493]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   31.524416]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   31.525318]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   31.526215]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   31.527159]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   31.528086]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   31.528989]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   31.529892]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   31.530835]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   31.531759]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   31.532666]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   31.533598]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   31.534534]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   31.535434]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   31.536344]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   31.537316]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   31.538272]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   31.539176]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   31.540124]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   31.541052]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   31.541954]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   31.542864]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   31.543804]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   31.544730]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   31.545630]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   31.546534]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   31.547478]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   31.548403]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   31.549308]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   31.550259]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   31.551189]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   31.552096]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   31.552996]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   31.553926]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   31.554859]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   31.555759]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   31.556688]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   31.557613]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   31.558513]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   31.559412]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   31.560339]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   31.561266] ---[ end trace a7d523cbffac9b99 ]---
>[   31.562156] [drm:process_single_tx_qlock] sideband msg failed to send
>[   31.563055] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   31.569693] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.576833] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.583968] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.591123] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.598202] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.605324] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   31.606747] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   31.607696] ------------[ cut here ]------------
>[   31.608577] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   31.609473] fail
>[   31.610356] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   31.613124] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   31.614049] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   31.614982] Workqueue: i915-dp i915_digport_work_func [i915]
>[   31.615874]  0000000000000009 ffff88030d0db568 ffffffff814d7f92 0000000000000007
>[   31.616811]  ffff88030d0db5b8 ffff88030d0db5a8 ffffffff8104e671 ffff88030d0db5b0
>[   31.617747]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   31.618649] Call Trace:
>[   31.619540]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   31.620482]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   31.621408]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   31.622306]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   31.623210]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   31.624140]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   31.625067]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   31.625969]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   31.626913]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   31.627833]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   31.628733]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   31.629631]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   31.630576]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   31.631502]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   31.632402]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   31.633344]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   31.634262]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   31.635171]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   31.636066]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   31.637016]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   31.637940]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   31.638846]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   31.639753]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   31.640696]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   31.641626]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   31.642526]  [<ffffffffa03d873b>] drm_dp_destroy_port+0x7b/0x80 [drm_kms_helper]
>[   31.643469]  [<ffffffffa03d8759>] drm_dp_put_port+0x19/0x20 [drm_kms_helper]
>[   31.644388]  [<ffffffffa03d88e4>] drm_dp_destroy_mst_branch_device+0x74/0x140 [drm_kms_helper]
>[   31.645292]  [<ffffffffa03d89c9>] drm_dp_put_mst_branch_device+0x19/0x20 [drm_kms_helper]
>[   31.646196]  [<ffffffffa03d86b4>] drm_dp_port_teardown_pdt+0x34/0x40 [drm_kms_helper]
>[   31.647139]  [<ffffffffa03db0ce>] drm_dp_mst_handle_up_req+0x46e/0x500 [drm_kms_helper]
>[   31.648064]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   31.648973]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   31.649884]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   31.650832]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   31.651754]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   31.652655]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   31.653587]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   31.654518]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   31.655419]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   31.656318]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   31.657248]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   31.658181]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   31.659079]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   31.660007] ---[ end trace a7d523cbffac9b9a ]---
>[   31.660929] [drm:process_single_tx_qlock] sideband msg failed to send
>[   31.661831] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   31.662739] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:64:DP-7] probed modes :
>[   31.663693] [drm:drm_mode_debug_printmodeline] Modeline 85:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[   31.664673] [drm:drm_mode_debug_printmodeline] Modeline 75:"800x600" 60 40000 800 840 968 1056 600 601 605 628 0x40 0x5
>[   31.665633] [drm:drm_mode_debug_printmodeline] Modeline 47:"800x600" 56 36000 800 824 896 1024 600 601 603 625 0x40 0x5
>[   31.666616] [drm:drm_mode_debug_printmodeline] Modeline 51:"848x480" 60 33750 848 864 976 1088 480 486 494 517 0x40 0x5
>[   31.667607] [drm:drm_mode_debug_printmodeline] Modeline 45:"640x480" 60 25175 640 656 752 800 480 489 492 525 0x40 0xa
>[   31.668583] [drm:drm_setup_crtcs] 
>[   31.669545] [drm:drm_enable_connectors] connector 19 enabled? yes
>[   31.670529] [drm:drm_enable_connectors] connector 27 enabled? no
>[   31.671488] [drm:drm_enable_connectors] connector 31 enabled? no
>[   31.672371] [drm:drm_enable_connectors] connector 34 enabled? no
>[   31.673206] [drm:drm_enable_connectors] connector 38 enabled? no
>[   31.674023] [drm:drm_enable_connectors] connector 39 enabled? no
>[   31.674824] [drm:drm_enable_connectors] connector 50 enabled? no
>[   31.675577] [drm:drm_enable_connectors] connector 64 enabled? yes
>[   31.676315] [drm:intel_fb_initial_config] looking for cmdline mode on connector eDP-1
>[   31.677085] [drm:intel_fb_initial_config] looking for preferred mode on connector eDP-1
>[   31.677859] [drm:intel_fb_initial_config] connector eDP-1 on pipe A [CRTC:8]: 1920x1080
>[   31.678600] [drm:intel_fb_initial_config] connector DP-1 not enabled, skipping
>[   31.679331] [drm:intel_fb_initial_config] connector HDMI-A-1 not enabled, skipping
>[   31.680092] [drm:intel_fb_initial_config] connector DP-2 not enabled, skipping
>[   31.680852] [drm:intel_fb_initial_config] connector HDMI-A-2 not enabled, skipping
>[   31.681583] [drm:intel_fb_initial_config] connector DP-3 not enabled, skipping
>[   31.682307] [drm:intel_fb_initial_config] connector DP-6 not enabled, skipping
>[   31.683021] [drm:intel_fb_initial_config] looking for cmdline mode on connector DP-7
>[   31.683761] [drm:intel_fb_initial_config] looking for preferred mode on connector DP-7
>[   31.684501] [drm:intel_fb_initial_config] using first mode listed on connector DP-7
>[   31.685203] [drm:intel_fb_initial_config] connector DP-7 on pipe C [CRTC:16]: 1024x768
>[   31.685904] [drm:drm_setup_crtcs] desired mode 1920x1080 set on crtc 8
>[   31.686635] [drm:drm_setup_crtcs] desired mode 1024x768 set on crtc 16
>[   31.687374] [drm:intel_crtc_set_config] [CRTC:8] [FB:41] #connectors=1 (x y) (0 0)
>[   31.688081] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:8], mode_changed=0, fb_changed=0
>[   31.688804] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[   31.689530] [drm:intel_modeset_stage_output_state] [CONNECTOR:64:DP-7] to [CRTC:16]
>[   31.690282] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 1, prepare: 1, disable: 0
>[   31.691045] [drm:connected_sink_compute_bpp] [CONNECTOR:19:eDP-1] checking for sink bpp constrains
>[   31.691780] [drm:connected_sink_compute_bpp] clamping display bpp (was 24) to EDID reported max of 18
>[   31.692518] [drm:intel_dp_compute_config] DP link computation with max lane count 2 max bw 0a pixel clock 141000KHz
>[   31.693280] [drm:intel_dp_compute_config] DP link bw 0a lane count 2 clock 270000 bpp 18
>[   31.694061] [drm:intel_dp_compute_config] DP link bw required 253800 available 432000
>[   31.694795] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 18, dithering: 1
>[   31.695529] [drm:intel_dump_pipe_config] [CRTC:8][modeset] config for pipe A
>[   31.696261] [drm:intel_dump_pipe_config] cpu_transcoder: D
>[   31.697011] [drm:intel_dump_pipe_config] pipe bpp: 18, dithering: 1
>[   31.697760] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[   31.698490] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 4928307, gmch_n: 8388608, link_m: 273794, link_n: 524288, tu: 64
>[   31.699227] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[   31.699993] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[   31.700753] [drm:intel_dump_pipe_config] requested mode:
>[   31.701475] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[   31.702224] [drm:intel_dump_pipe_config] adjusted mode:
>[   31.702971] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[   31.703771] [drm:intel_dump_crtc_timings] crtc timings: 141000 1920 1936 1952 2104 1080 1083 1097 1116, type: 0x48 flags: 0xa
>[   31.704589] [drm:intel_dump_pipe_config] port clock: 270000
>[   31.705368] [drm:intel_dump_pipe_config] pipe src size: 1920x1080
>[   31.706144] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[   31.706968] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[   31.707797] [drm:intel_dump_pipe_config] ips: 1
>[   31.708590] [drm:intel_dump_pipe_config] double wide: 0
>[   31.709384] [drm:intel_crtc_set_config] [CRTC:12] [NOFB]
>[   31.710207] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:12], mode_changed=0, fb_changed=0
>[   31.711054] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[   31.711873] [drm:intel_modeset_stage_output_state] [CONNECTOR:64:DP-7] to [CRTC:16]
>[   31.712688] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 0, prepare: 0, disable: 0
>[   31.713537] [drm:intel_crtc_set_config] [CRTC:16] [FB:41] #connectors=1 (x y) (0 0)
>[   31.714389] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:16], mode_changed=0, fb_changed=0
>[   31.715228] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[   31.716063] [drm:intel_modeset_stage_output_state] [CONNECTOR:64:DP-7] to [CRTC:16]
>[   31.716909] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 4, prepare: 4, disable: 0
>[   31.717763] [drm:connected_sink_compute_bpp] [CONNECTOR:64:DP-7] checking for sink bpp constrains
>[   31.718598] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 24, dithering: 0
>[   31.719440] [drm:intel_dump_pipe_config] [CRTC:16][modeset] config for pipe C
>[   31.720312] [drm:intel_dump_pipe_config] cpu_transcoder: C
>[   31.721169] [drm:intel_dump_pipe_config] pipe bpp: 24, dithering: 0
>[   31.721993] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[   31.722839] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 757304, gmch_n: 8388608, link_m: 126217, link_n: 1048576, tu: 6
>[   31.723730] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[   31.724633] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[   31.725509] [drm:intel_dump_pipe_config] requested mode:
>[   31.726388] [drm:drm_mode_debug_printmodeline] Modeline 0:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[   31.727329] [drm:intel_dump_pipe_config] adjusted mode:
>[   31.728278] [drm:drm_mode_debug_printmodeline] Modeline 0:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[   31.729218] [drm:intel_dump_crtc_timings] crtc timings: 65000 1024 1048 1184 1344 768 771 777 806, type: 0x40 flags: 0xa
>[   31.730201] [drm:intel_dump_pipe_config] port clock: 540000
>[   31.731180] [drm:intel_dump_pipe_config] pipe src size: 1024x768
>[   31.732128] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[   31.733096] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[   31.734096] [drm:intel_dump_pipe_config] ips: 0
>[   31.735093] [drm:intel_dump_pipe_config] double wide: 0
>[   31.736061] [drm:drm_dp_mst_handle_up_req] Got CSN: pn: 2 ldps:0 ddps: 0 mcs: 0 ip: 0 pdt: 0
>[   31.737096] [drm:drm_fb_helper_hotplug_event] 
>[   31.738142] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:19:eDP-1]
>[   31.739138] [drm:intel_dp_detect] [CONNECTOR:19:eDP-1]
>[   31.740504] [drm:intel_dp_probe_oui] Sink OUI: 001cf8
>[   31.741830] [drm:intel_dp_probe_oui] Branch OUI: 000000
>[   31.742829] [drm:drm_edid_to_eld] ELD: no CEA Extension found
>[   31.743861] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:19:eDP-1] probed modes :
>[   31.744884] [drm:drm_mode_debug_printmodeline] Modeline 20:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[   31.745895] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:DP-1]
>[   31.746931] [drm:intel_dp_detect] [CONNECTOR:27:DP-1]
>[   31.747970] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:DP-1] disconnected
>[   31.748989] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:31:HDMI-A-1]
>[   31.750027] [drm:intel_hdmi_detect] [CONNECTOR:31:HDMI-A-1]
>[   31.763250] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[   31.764539] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:31:HDMI-A-1] disconnected
>[   31.765576] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:34:DP-2]
>[   31.766610] [drm:intel_dp_detect] [CONNECTOR:34:DP-2]
>[   31.767642] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:34:DP-2] disconnected
>[   31.768658] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:38:HDMI-A-2]
>[   31.769670] [drm:intel_hdmi_detect] [CONNECTOR:38:HDMI-A-2]
>[   31.770889] [drm:gmbus_xfer] GMBUS [i915 gmbus dpc] NAK for addr: 0050 r(1)
>[   31.771906] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpc
>[   31.772925] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:38:HDMI-A-2] disconnected
>[   31.773978] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:39:DP-3]
>[   31.775024] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:39:DP-3] disconnected
>[   31.776039] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:50:DP-6]
>[   31.777063] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:50:DP-6] disconnected
>[   31.778070] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:64:DP-7]
>[   31.780344] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[   31.781843] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[   34.745540] [drm:edp_panel_vdd_off_sync] Turning eDP port A VDD off
>[   34.746998] [drm:edp_panel_vdd_off_sync] PP_STATUS: 0x80000008 PP_CONTROL: 0xabcd0007
>[   35.775200] [drm:drm_dp_mst_wait_tx_reply] timedout msg send ffff8800c99d8800 2 0
>[   35.782615] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.789842] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.796980] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.804147] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.811289] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.818407] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.819801] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   35.820858] ------------[ cut here ]------------
>[   35.821740] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   35.822668] fail
>[   35.823583] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   35.826666] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   35.827671] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   35.828735] Workqueue: i915-dp i915_digport_work_func [i915]
>[   35.829765]  0000000000000009 ffff88030d0db5e8 ffffffff814d7f92 ffff88031e20e558
>[   35.830794]  ffff88030d0db638 ffff88030d0db628 ffffffff8104e671 ffff88030d0db630
>[   35.831845]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   35.832889] Call Trace:
>[   35.833891]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   35.834896]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   35.835933]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   35.836957]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   35.837947]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   35.838968]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   35.839952]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   35.840918]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   35.841930]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   35.842915]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   35.843873]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   35.844828]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   35.845831]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   35.846816]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   35.847769]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   35.848762]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   35.849723]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   35.850680]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   35.851636]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   35.852649]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   35.853631]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   35.854586]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   35.855573]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   35.856530]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   35.857472]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   35.858431]  [<ffffffffa03daed1>] drm_dp_mst_handle_up_req+0x271/0x500 [drm_kms_helper]
>[   35.859390]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   35.860329]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   35.861261]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   35.862233]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   35.863178]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   35.864088]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   35.865004]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   35.865938]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   35.866867]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   35.867754]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   35.868665]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   35.869580]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   35.870468]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   35.871365] ---[ end trace a7d523cbffac9b9b ]---
>[   35.872295] [drm:process_single_tx_qlock] sideband msg failed to send
>[   35.873240] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   35.879861] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.886982] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.894218] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.901320] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.908378] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.915443] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.916753] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   35.917859] ------------[ cut here ]------------
>[   35.918841] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   35.919780] fail
>[   35.920697] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   35.923853] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   35.924877] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   35.925920] Workqueue: i915-dp i915_digport_work_func [i915]
>[   35.926898]  0000000000000009 ffff88030d0db5e8 ffffffff814d7f92 ffff88031e20e558
>[   35.927831]  ffff88030d0db638 ffff88030d0db628 ffffffff8104e671 ffff88030d0db630
>[   35.928783]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   35.929728] Call Trace:
>[   35.930622]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   35.931518]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   35.932448]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   35.933373]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   35.934271]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   35.935199]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   35.936128]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   35.937045]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   35.937957]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   35.938907]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   35.939832]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   35.940731]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   35.941628]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   35.942568]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   35.943482]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   35.944383]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   35.945320]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   35.946248]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   35.947149]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   35.948066]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   35.949022]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   35.949963]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   35.950887]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   35.951837]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   35.952780]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   35.953692]  [<ffffffffa03daed1>] drm_dp_mst_handle_up_req+0x271/0x500 [drm_kms_helper]
>[   35.954606]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   35.955566]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   35.956499]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   35.957406]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   35.958304]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   35.959230]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   35.960153]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   35.961043]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   35.961958]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   35.962867]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   35.963751]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   35.964637]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   35.965553]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   35.966477] ---[ end trace a7d523cbffac9b9c ]---
>[   35.967368] [drm:process_single_tx_qlock] sideband msg failed to send
>[   35.968267] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   35.974904] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.982034] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.989158] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   35.996241] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   36.003295] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   36.010344] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   36.011666] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   36.012787] ------------[ cut here ]------------
>[   36.013695] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   36.014613] fail
>[   36.015561] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   36.018738] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   36.019789] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   36.020791] Workqueue: i915-dp i915_digport_work_func [i915]
>[   36.021777]  0000000000000009 ffff88030d0db5e8 ffffffff814d7f92 ffff88031e20e558
>[   36.022739]  ffff88030d0db638 ffff88030d0db628 ffffffff8104e671 ffff88030d0db630
>[   36.023659]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   36.024572] Call Trace:
>[   36.025498]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   36.026426]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   36.027325]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   36.028219]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   36.029157]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   36.030075]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   36.030974]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   36.031927]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   36.032857]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   36.033764]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   36.034668]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   36.035595]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   36.036524]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   36.037423]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   36.038317]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   36.039259]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   36.040176]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   36.041085]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   36.042027]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   36.042963]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   36.043878]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   36.044799]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   36.045764]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   36.046697]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   36.047621]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   36.048573]  [<ffffffffa03daed1>] drm_dp_mst_handle_up_req+0x271/0x500 [drm_kms_helper]
>[   36.049507]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   36.050425]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   36.051340]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   36.052288]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   36.053208]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   36.054105]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   36.054997]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   36.055925]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   36.056810]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   36.057691]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   36.058605]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   36.059523]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   36.060410]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   36.061304] ---[ end trace a7d523cbffac9b9d ]---
>[   36.062225] [drm:process_single_tx_qlock] sideband msg failed to send
>[   36.063159] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   36.069765] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   36.076881] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   36.083986] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   36.091060] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   36.098097] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   36.104973] [drm:drm_dp_dpcd_access] too many retries, giving up
>[   36.106317] [drm:drm_dp_send_sideband_msg] failed to dpcd write 12 -5
>[   36.107383] ------------[ cut here ]------------
>[   36.108294] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_dp_mst_topology.c:1262 process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]()
>[   36.109242] fail
>[   36.110193] Modules linked in: snd_hda_codec_hdmi iTCO_wdt x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_generic coretemp i915 lpc_ich microcode psmouse ehci_pci mfd_core ehci_hcd thermal cfbfillrect cfbimgblt i2c_algo_bit cfbcopyarea snd_hda_intel snd_hda_controller drm_kms_helper drm snd_hda_codec thinkpad_acpi i2c_core snd_hwdep nvram snd_pcm intel_gtt xhci_pci led_class agpgart battery ac snd_timer xhci_hcd snd video rtc_cmos usbcore soundcore evdev processor usb_common thermal_sys hwmon
>[   36.113369] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G        W      3.18.0-00343-gfc7bddc-dirty #12
>[   36.114394] Hardware name: LENOVO 20ARS36E00/20ARS36E00, BIOS GJET78WW (2.28 ) 07/29/2014
>[   36.115438] Workqueue: i915-dp i915_digport_work_func [i915]
>[   36.116413]  0000000000000009 ffff88030d0db5e8 ffffffff814d7f92 ffff88031e20e558
>[   36.117345]  ffff88030d0db638 ffff88030d0db628 ffffffff8104e671 ffff88030d0db630
>[   36.118265]  ffff88030c07b8c0 0000000000001000 ffff88030c07b8c0 000000000000000c
>[   36.119209] Call Trace:
>[   36.120135]  [<ffffffff814d7f92>] dump_stack+0x46/0x58
>[   36.121031]  [<ffffffff8104e671>] warn_slowpath_common+0x81/0xa0
>[   36.121958]  [<ffffffff8104e6d6>] warn_slowpath_fmt+0x46/0x50
>[   36.122882]  [<ffffffffa03d7a0e>] process_single_tx_qlock+0x5ee/0x650 [drm_kms_helper]
>[   36.123780]  [<ffffffffa03d7be9>] ? drm_dp_queue_down_tx+0x29/0x80 [drm_kms_helper]
>[   36.124678]  [<ffffffff810975f5>] ? mark_held_locks+0x75/0xa0
>[   36.125618]  [<ffffffffa03d7ab2>] process_single_down_tx_qlock+0x42/0x150 [drm_kms_helper]
>[   36.126553]  [<ffffffffa03d7c2a>] drm_dp_queue_down_tx+0x6a/0x80 [drm_kms_helper]
>[   36.127465]  [<ffffffffa03d9d06>] drm_dp_mst_i2c_xfer+0x146/0x240 [drm_kms_helper]
>[   36.128414]  [<ffffffff81099222>] ? __lock_acquire+0x4d2/0x21d0
>[   36.129337]  [<ffffffff81090150>] ? print_cpu+0x960/0xd30
>[   36.130233]  [<ffffffffa02d31dd>] __i2c_transfer+0x6d/0x210 [i2c_core]
>[   36.131131]  [<ffffffffa02d5a67>] i2c_transfer+0x57/0xc0 [i2c_core]
>[   36.132072]  [<ffffffffa03803a9>] drm_do_probe_ddc_edid+0xc9/0x140 [drm]
>[   36.132987]  [<ffffffff814dc79e>] ? __mutex_unlock_slowpath+0xae/0x190
>[   36.133887]  [<ffffffffa0380479>] drm_get_edid+0x29/0x50 [drm]
>[   36.134783]  [<ffffffffa03d89fe>] drm_dp_mst_get_edid+0x2e/0x50 [drm_kms_helper]
>[   36.135733]  [<ffffffffa0539b59>] intel_dp_mst_get_modes+0x29/0x50 [i915]
>[   36.136655]  [<ffffffffa03d594c>] drm_helper_probe_single_connector_modes_merge_bits+0xec/0x480 [drm_kms_helper]
>[   36.137571]  [<ffffffffa03d5cf3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
>[   36.138527]  [<ffffffffa03df650>] drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
>[   36.139465]  [<ffffffffa03e0390>] drm_fb_helper_hotplug_event+0x60/0xe0 [drm_kms_helper]
>[   36.140389]  [<ffffffffa05290ce>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
>[   36.141300]  [<ffffffffa03d55db>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
>[   36.142271]  [<ffffffffa0539ad5>] intel_dp_mst_hotplug+0x15/0x20 [i915]
>[   36.143204]  [<ffffffffa03daed1>] drm_dp_mst_handle_up_req+0x271/0x500 [drm_kms_helper]
>[   36.144120]  [<ffffffffa03db1b3>] drm_dp_mst_hpd_irq+0x53/0x9f0 [drm_kms_helper]
>[   36.145079]  [<ffffffffa0537a75>] intel_dp_check_mst_status+0xb5/0x250 [i915]
>[   36.146013]  [<ffffffffa0538819>] intel_dp_hpd_pulse+0x199/0x2a0 [i915]
>[   36.146920]  [<ffffffffa04e21af>] i915_digport_work_func+0x8f/0x110 [i915]
>[   36.147818]  [<ffffffff81065fc2>] process_one_work+0x1b2/0x490
>[   36.148744]  [<ffffffff81065f51>] ? process_one_work+0x141/0x490
>[   36.149667]  [<ffffffff81066b1b>] worker_thread+0x6b/0x4a0
>[   36.150557]  [<ffffffff81066ab0>] ? init_pwq+0xf0/0xf0
>[   36.151442]  [<ffffffff8106bba6>] kthread+0xf6/0x110
>[   36.152350]  [<ffffffff814de560>] ? _raw_spin_unlock_irq+0x30/0x40
>[   36.153266]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   36.154153]  [<ffffffff814defec>] ret_from_fork+0x7c/0xb0
>[   36.155069]  [<ffffffff8106bab0>] ? kthread_create_on_node+0x220/0x220
>[   36.155991] ---[ end trace a7d523cbffac9b9e ]---
>[   36.156881] [drm:process_single_tx_qlock] sideband msg failed to send
>[   36.157780] [drm:process_single_down_tx_qlock] failed to send msg in q -5
>[   36.158732] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:64:DP-7] probed modes :
>[   36.159669] [drm:drm_mode_debug_printmodeline] Modeline 85:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[   36.160598] [drm:drm_mode_debug_printmodeline] Modeline 75:"800x600" 60 40000 800 840 968 1056 600 601 605 628 0x40 0x5
>[   36.161527] [drm:drm_mode_debug_printmodeline] Modeline 47:"800x600" 56 36000 800 824 896 1024 600 601 603 625 0x40 0x5
>[   36.162480] [drm:drm_mode_debug_printmodeline] Modeline 51:"848x480" 60 33750 848 864 976 1088 480 486 494 517 0x40 0x5
>[   36.163434] [drm:drm_mode_debug_printmodeline] Modeline 45:"640x480" 60 25175 640 656 752 800 480 489 492 525 0x40 0xa
>[   36.164373] [drm:drm_setup_crtcs] 
>[   36.165336] [drm:drm_enable_connectors] connector 19 enabled? yes
>[   36.166318] [drm:drm_enable_connectors] connector 27 enabled? no
>[   36.167266] [drm:drm_enable_connectors] connector 31 enabled? no
>[   36.168216] [drm:drm_enable_connectors] connector 34 enabled? no
>[   36.169183] [drm:drm_enable_connectors] connector 38 enabled? no
>[   36.170143] [drm:drm_enable_connectors] connector 39 enabled? no
>[   36.171047] [drm:drm_enable_connectors] connector 50 enabled? no
>[   36.171955] [drm:drm_enable_connectors] connector 64 enabled? yes
>[   36.172820] [drm:intel_fb_initial_config] looking for cmdline mode on connector eDP-1
>[   36.173625] [drm:intel_fb_initial_config] looking for preferred mode on connector eDP-1
>[   36.174390] [drm:intel_fb_initial_config] connector eDP-1 on pipe A [CRTC:8]: 1920x1080
>[   36.175176] [drm:intel_fb_initial_config] connector DP-1 not enabled, skipping
>[   36.175951] [drm:intel_fb_initial_config] connector HDMI-A-1 not enabled, skipping
>[   36.176685] [drm:intel_fb_initial_config] connector DP-2 not enabled, skipping
>[   36.177413] [drm:intel_fb_initial_config] connector HDMI-A-2 not enabled, skipping
>[   36.178138] [drm:intel_fb_initial_config] connector DP-3 not enabled, skipping
>[   36.178889] [drm:intel_fb_initial_config] connector DP-6 not enabled, skipping
>[   36.179631] [drm:intel_fb_initial_config] looking for cmdline mode on connector DP-7
>[   36.180339] [drm:intel_fb_initial_config] looking for preferred mode on connector DP-7
>[   36.181046] [drm:intel_fb_initial_config] using first mode listed on connector DP-7
>[   36.181787] [drm:intel_fb_initial_config] connector DP-7 on pipe C [CRTC:16]: 1024x768
>[   36.182529] [drm:drm_setup_crtcs] desired mode 1920x1080 set on crtc 8
>[   36.183239] [drm:drm_setup_crtcs] desired mode 1024x768 set on crtc 16
>[   36.183950] [drm:intel_crtc_set_config] [CRTC:8] [FB:41] #connectors=1 (x y) (0 0)
>[   36.184657] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:8], mode_changed=0, fb_changed=0
>[   36.185406] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[   36.186161] [drm:intel_modeset_stage_output_state] [CONNECTOR:64:DP-7] to [CRTC:16]
>[   36.186875] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 1, prepare: 1, disable: 0
>[   36.187602] [drm:connected_sink_compute_bpp] [CONNECTOR:19:eDP-1] checking for sink bpp constrains
>[   36.188363] [drm:connected_sink_compute_bpp] clamping display bpp (was 24) to EDID reported max of 18
>[   36.189131] [drm:intel_dp_compute_config] DP link computation with max lane count 2 max bw 0a pixel clock 141000KHz
>[   36.189881] [drm:intel_dp_compute_config] DP link bw 0a lane count 2 clock 270000 bpp 18
>[   36.190629] [drm:intel_dp_compute_config] DP link bw required 253800 available 432000
>[   36.191375] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 18, dithering: 1
>[   36.192151] [drm:intel_dump_pipe_config] [CRTC:8][modeset] config for pipe A
>[   36.192933] [drm:intel_dump_pipe_config] cpu_transcoder: D
>[   36.193665] [drm:intel_dump_pipe_config] pipe bpp: 18, dithering: 1
>[   36.194397] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[   36.195167] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 4928307, gmch_n: 8388608, link_m: 273794, link_n: 524288, tu: 64
>[   36.195946] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[   36.196688] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[   36.197421] [drm:intel_dump_pipe_config] requested mode:
>[   36.198145] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[   36.198923] [drm:intel_dump_pipe_config] adjusted mode:
>[   36.199703] [drm:drm_mode_debug_printmodeline] Modeline 0:"1920x1080" 60 141000 1920 1936 1952 2104 1080 1083 1097 1116 0x48 0xa
>[   36.200474] [drm:intel_dump_crtc_timings] crtc timings: 141000 1920 1936 1952 2104 1080 1083 1097 1116, type: 0x48 flags: 0xa
>[   36.201259] [drm:intel_dump_pipe_config] port clock: 270000
>[   36.202068] [drm:intel_dump_pipe_config] pipe src size: 1920x1080
>[   36.202876] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[   36.203673] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[   36.204472] [drm:intel_dump_pipe_config] ips: 1
>[   36.205297] [drm:intel_dump_pipe_config] double wide: 0
>[   36.206124] [drm:intel_crtc_set_config] [CRTC:12] [NOFB]
>[   36.206918] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:12], mode_changed=0, fb_changed=0
>[   36.207735] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[   36.208587] [drm:intel_modeset_stage_output_state] [CONNECTOR:64:DP-7] to [CRTC:16]
>[   36.209434] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 0, prepare: 0, disable: 0
>[   36.210257] [drm:intel_crtc_set_config] [CRTC:16] [FB:41] #connectors=1 (x y) (0 0)
>[   36.211080] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:16], mode_changed=0, fb_changed=0
>[   36.211953] [drm:intel_modeset_stage_output_state] [CONNECTOR:19:eDP-1] to [CRTC:8]
>[   36.212818] [drm:intel_modeset_stage_output_state] [CONNECTOR:64:DP-7] to [CRTC:16]
>[   36.213638] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 4, prepare: 4, disable: 0
>[   36.214462] [drm:connected_sink_compute_bpp] [CONNECTOR:64:DP-7] checking for sink bpp constrains
>[   36.215328] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 24, dithering: 0
>[   36.216201] [drm:intel_dump_pipe_config] [CRTC:16][modeset] config for pipe C
>[   36.217044] [drm:intel_dump_pipe_config] cpu_transcoder: C
>[   36.217870] [drm:intel_dump_pipe_config] pipe bpp: 24, dithering: 0
>[   36.218724] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[   36.219603] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 757304, gmch_n: 8388608, link_m: 126217, link_n: 1048576, tu: 6
>[   36.220466] [drm:intel_dump_pipe_config] dp: 1, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
>[   36.221340] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
>[   36.222246] [drm:intel_dump_pipe_config] requested mode:
>[   36.223158] [drm:drm_mode_debug_printmodeline] Modeline 0:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[   36.224072] [drm:intel_dump_pipe_config] adjusted mode:
>[   36.225022] [drm:drm_mode_debug_printmodeline] Modeline 0:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
>[   36.225994] [drm:intel_dump_crtc_timings] crtc timings: 65000 1024 1048 1184 1344 768 771 777 806, type: 0x40 flags: 0xa
>[   36.226948] [drm:intel_dump_pipe_config] port clock: 540000
>[   36.227897] [drm:intel_dump_pipe_config] pipe src size: 1024x768
>[   36.228875] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[   36.229875] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[   36.230847] [drm:intel_dump_pipe_config] ips: 0
>[   36.231842] [drm:intel_dump_pipe_config] double wide: 0
>[   36.233549] [drm:intel_dp_check_mst_status] got esi2 01 10 00
>[   36.233768] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00400000, dig 0x10101110
>[   36.233770] [drm:intel_hpd_irq_handler] digital hpd port C - short
>[   36.236571] [drm:intel_dp_check_mst_status] got esi 01 10 00
>[   36.237908] [drm:drm_dp_mst_handle_down_rep] Got MST reply with no msg ffff8800c8dfa2a0 0 1 0d 22
>[   36.239650] [drm:intel_dp_check_mst_status] got esi2 01 00 00
>[   36.240654] [drm:intel_dp_check_mst_status] got esi 01 00 00
>[   36.241690] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
>[   36.243202] [drm:intel_dp_check_mst_status] got esi 01 00 00

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