Created attachment 141201 [details]
Linux 4.18+ messages with drm.debug=0xe

Here is a verbose log. I believe it’s related to DP 1.2 and the MST Dell monitor.

[   15.113453] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 24ms in enc1_stream_encoder_dp_blank line:804
[   15.146724] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 3ms in optc1_disable_crtc line:513
[   23.953593] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 5ms in mpc1_assert_idle_mpcc line:103
[   24.003514] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 7ms in mpc1_assert_idle_mpcc line:103
[  100.425097] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 6ms in mpc1_assert_idle_mpcc line:103
[  100.441735] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 7ms in mpc1_assert_idle_mpcc line:103
[  104.509792] [drm:generic_reg_wait [amdgpu]] *ERROR* REG_WAIT timeout 10us * 3000 tries - enc1_stream_encoder_dp_blank line:804
[  104.509841] WARNING: CPU: 1 PID: 1550 at drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c:254 generic_reg_wait+0xe7/0x160 [amdgpu]
[  104.509895] RIP: 0010:generic_reg_wait+0xe7/0x160 [amdgpu]
[  104.517863] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 2ms in optc1_disable_crtc line:513
[  108.605859] [drm:generic_reg_wait [amdgpu]] *ERROR* REG_WAIT timeout 10us * 3000 tries - enc1_stream_encoder_dp_blank line:804
[  108.605909] WARNING: CPU: 2 PID: 1550 at drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c:254 generic_reg_wait+0xe7/0x160 [amdgpu]
[  108.605964] RIP: 0010:generic_reg_wait+0xe7/0x160 [amdgpu]
[  108.610990] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 1ms in optc1_disable_crtc line:513
[  110.529644] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 3ms in optc1_wait_for_state line:782
[  110.536052] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 2ms in optc1_wait_for_state line:782
[  115.561370] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 2ms in mpc1_assert_idle_mpcc line:103
[  115.578008] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 5ms in mpc1_assert_idle_mpcc line:103
[  115.686970] [drm:generic_reg_wait [amdgpu]] *ERROR* REG_WAIT timeout 10us * 3000 tries - enc1_stream_encoder_dp_blank line:804
[  115.687021] WARNING: CPU: 3 PID: 48 at drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c:254 generic_reg_wait+0xe7/0x160 [amdgpu]
[  115.687079] RIP: 0010:generic_reg_wait+0xe7/0x160 [amdgpu]
[  115.694125] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 2ms in optc1_disable_crtc line:513
[  115.737576] [drm:generic_reg_wait [amdgpu]] *ERROR* REG_WAIT timeout 10us * 3000 tries - enc1_stream_encoder_dp_blank line:804
[  115.737626] WARNING: CPU: 3 PID: 48 at drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c:254 generic_reg_wait+0xe7/0x160 [amdgpu]
[  115.737678] RIP: 0010:generic_reg_wait+0xe7/0x160 [amdgpu]
[  115.744042] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 1ms in optc1_disable_crtc line:513
[  116.250536] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 1ms in optc1_wait_for_state line:782
[  116.267508] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 5ms in mpc1_assert_idle_mpcc line:103
[  256.781411] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 5ms in mpc1_assert_idle_mpcc line:103
[  256.798049] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 7ms in mpc1_assert_idle_mpcc line:103
[  256.830971] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 3ms in optc1_disable_crtc line:513
[  256.864242] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 5ms in optc1_disable_crtc line:513
[  260.684885] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 2ms in optc1_wait_for_state line:782
[  260.701867] [drm:generic_reg_wait [amdgpu]] REG_WAIT taking a while: 6ms in mpc1_assert_idle_mpcc line:103

I have (maybe?) the same issue

```
[   36.787663] [drm:generic_reg_wait [amdgpu]] *ERROR* REG_WAIT timeout 10us * 3000 tries - enc1_stream_encoder_dp_blank line:800
[   36.787785] WARNING: CPU: 2 PID: 825 at drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c:254 generic_reg_wait+0xe7/0x160 [amdgpu]
[   36.787787] Modules linked in: arc4 r8822be(C) joydev mousedev wmi_bmof hid_lenovo mac80211 snd_hda_codec_realtek edac_mce_amd snd_hda_codec_generic snd_hda_codec_hdmi kvm_amd uvcvideo ccp snd_hda_intel videobuf2_vmalloc videobuf2_memops kvm snd_hda_codec snd_usb_audio videobuf2_v4l2 snd_hda_core videobuf2_common snd_usbmidi_lib irqbypass psmouse cfg80211 snd_rawmidi snd_hwdep snd_seq_device tpm_crb videodev input_leds k10temp snd_pcm sp5100_tco thinkpad_acpi tpm_tis i2c_piix4 media tpm_tis_core ipmi_devintf nvram snd_timer tpm ucsi_acpi hid_generic r8169 ipmi_msghandler typec_ucsi snd mii rng_core rfkill typec soundcore led_class wmi battery ac evdev i2c_scmi mac_hid pcc_cpufreq acpi_cpufreq ip_tables x_tables btrfs libcrc32c crc32c_generic xor zstd_decompress zstd_compress xxhash raid6_pq algif_skcipher
[   36.787837]  af_alg usbhid hid dm_crypt dm_mod serio_raw atkbd libps2 crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel pcbc ahci libahci aesni_intel aes_x86_64 xhci_pci crypto_simd libata cryptd ehci_pci glue_helper xhci_hcd ehci_hcd scsi_mod usbcore usb_common i8042 serio amdgpu chash i2c_algo_bit gpu_sched drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm agpgart
[   36.787870] CPU: 2 PID: 825 Comm: Xorg Tainted: G         C        4.18.6-arch1-1-ARCH #1
[   36.787871] Hardware name: LENOVO 20MUS02400/20MUS02400, BIOS R0WET34W (1.02 ) 07/05/2018
[   36.787935] RIP: 0010:generic_reg_wait+0xe7/0x160 [amdgpu]
[   36.787936] Code: 44 24 58 8b 54 24 48 89 de 44 89 4c 24 08 48 8b 4c 24 50 48 c7 c7 18 0f 6f c0 e8 04 60 d8 ff 83 7d 20 01 44 8b 4c 24 08 74 02 <0f> 0b 48 83 c4 10 44 89 c8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 41 0f 
[   36.787973] RSP: 0018:ffffa2548a52f800 EFLAGS: 00010297
[   36.787976] RAX: 0000000000000000 RBX: 000000000000000a RCX: 0000000000000001
[   36.787977] RDX: 0000000000000000 RSI: ffffffffaec8051e RDI: 00000000ffffffff
[   36.787978] RBP: ffff8ce5a5ec8c00 R08: ffffffffae2ddf70 R09: 0000000000010200
[   36.787980] R10: 0000000000000004 R11: ffffffffaf404f2d R12: 0000000000000bb9
[   36.787981] R13: 00000000000058cc R14: 0000000000010000 R15: 0000000000000000
[   36.787983] FS:  00007f7cf85aee00(0000) GS:ffff8ce5af880000(0000) knlGS:0000000000000000
[   36.787984] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   36.787986] CR2: 00007f7ccf5d8600 CR3: 0000000816524000 CR4: 00000000003406e0
[   36.787987] Call Trace:
[   36.788059]  enc1_stream_encoder_dp_blank+0x12c/0x1a0 [amdgpu]
[   36.788126]  core_link_disable_stream+0x54/0x220 [amdgpu]
[   36.788195]  reset_hw_ctx_wrap+0x25c/0x2a0 [amdgpu]
[   36.788260]  dce110_apply_ctx_to_hw+0x52/0xa30 [amdgpu]
[   36.788327]  ? dcn10_verify_allow_pstate_change_high+0x1d/0x240 [amdgpu]
[   36.788389]  dc_commit_state+0x2d1/0x550 [amdgpu]
[   36.788451]  ? set_freesync_on_streams.part.6+0x4d/0x250 [amdgpu]
[   36.788511]  ? mod_freesync_set_user_enable+0x11f/0x150 [amdgpu]
[   36.788578]  amdgpu_dm_atomic_commit_tail+0x37c/0xd70 [amdgpu]
[   36.788585]  ? preempt_count_add+0x68/0xa0
[   36.788590]  ? _raw_spin_lock_irq+0x1a/0x40
[   36.788592]  ? _raw_spin_unlock_irq+0x1d/0x30
[   36.788595]  ? wait_for_common+0x113/0x190
[   36.788597]  ? _raw_spin_unlock_irq+0x1d/0x30
[   36.788599]  ? wait_for_common+0x113/0x190
[   36.788610]  commit_tail+0x3d/0x70 [drm_kms_helper]
[   36.788620]  drm_atomic_helper_commit+0x103/0x110 [drm_kms_helper]
[   36.788628]  drm_atomic_helper_set_config+0x80/0x90 [drm_kms_helper]
[   36.788644]  __drm_mode_set_config_internal+0x67/0x120 [drm]
[   36.788659]  drm_mode_setcrtc+0x434/0x620 [drm]
[   36.788676]  ? drm_mode_getcrtc+0x180/0x180 [drm]
[   36.788688]  drm_ioctl_kernel+0xa7/0xf0 [drm]
[   36.788701]  drm_ioctl+0x30e/0x3c0 [drm]
[   36.788715]  ? drm_mode_getcrtc+0x180/0x180 [drm]
[   36.788757]  amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
[   36.788765]  do_vfs_ioctl+0xa4/0x620
[   36.788770]  ? syscall_slow_exit_work+0x19b/0x1b0
[   36.788773]  ksys_ioctl+0x60/0x90
[   36.788776]  __x64_sys_ioctl+0x16/0x20
[   36.788779]  do_syscall_64+0x5b/0x170
[   36.788782]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   36.788785] RIP: 0033:0x7f7cfbd9979b
[   36.788786] Code: 0f 1e fa 48 8b 05 c5 b6 0c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 95 b6 0c 00 f7 d8 64 89 01 48 
[   36.788823] RSP: 002b:00007fff774dcc58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   36.788826] RAX: ffffffffffffffda RBX: 00007fff774dcc90 RCX: 00007f7cfbd9979b
[   36.788059]  enc1_stream_encoder_dp_blank+0x12c/0x1a0 [amdgpu]
[   36.788126]  core_link_disable_stream+0x54/0x220 [amdgpu]
[   36.788195]  reset_hw_ctx_wrap+0x25c/0x2a0 [amdgpu]
[   36.788260]  dce110_apply_ctx_to_hw+0x52/0xa30 [amdgpu]
[   36.788327]  ? dcn10_verify_allow_pstate_change_high+0x1d/0x240 [amdgpu]
[   36.788389]  dc_commit_state+0x2d1/0x550 [amdgpu]
[   36.788451]  ? set_freesync_on_streams.part.6+0x4d/0x250 [amdgpu]
[   36.788511]  ? mod_freesync_set_user_enable+0x11f/0x150 [amdgpu]
[   36.788578]  amdgpu_dm_atomic_commit_tail+0x37c/0xd70 [amdgpu]
[   36.788585]  ? preempt_count_add+0x68/0xa0
[   36.788590]  ? _raw_spin_lock_irq+0x1a/0x40
[   36.788592]  ? _raw_spin_unlock_irq+0x1d/0x30
[   36.788595]  ? wait_for_common+0x113/0x190
[   36.788597]  ? _raw_spin_unlock_irq+0x1d/0x30
[   36.788599]  ? wait_for_common+0x113/0x190
[   36.788610]  commit_tail+0x3d/0x70 [drm_kms_helper]
[   36.788620]  drm_atomic_helper_commit+0x103/0x110 [drm_kms_helper]
[   36.788628]  drm_atomic_helper_set_config+0x80/0x90 [drm_kms_helper]
[   36.788644]  __drm_mode_set_config_internal+0x67/0x120 [drm]
[   36.788659]  drm_mode_setcrtc+0x434/0x620 [drm]
[   36.788676]  ? drm_mode_getcrtc+0x180/0x180 [drm]
[   36.788688]  drm_ioctl_kernel+0xa7/0xf0 [drm]
[   36.788701]  drm_ioctl+0x30e/0x3c0 [drm]
[   36.788715]  ? drm_mode_getcrtc+0x180/0x180 [drm]
[   36.788757]  amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
[   36.788765]  do_vfs_ioctl+0xa4/0x620
[   36.788770]  ? syscall_slow_exit_work+0x19b/0x1b0
[   36.788773]  ksys_ioctl+0x60/0x90
[   36.788776]  __x64_sys_ioctl+0x16/0x20
[   36.788779]  do_syscall_64+0x5b/0x170
[   36.788782]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   36.788785] RIP: 0033:0x7f7cfbd9979b
[   36.788786] Code: 0f 1e fa 48 8b 05 c5 b6 0c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 95 b6 0c 00 f7 d8 64 89 01 48 
[   36.788823] RSP: 002b:00007fff774dcc58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   36.788826] RAX: ffffffffffffffda RBX: 00007fff774dcc90 RCX: 00007f7cfbd9979b
[   36.788827] RDX: 00007fff774dcc90 RSI: 00000000c06864a2 RDI: 000000000000000b
[   36.788828] RBP: 00007fff774dcc90 R08: 0000000000000000 R09: 0000562e2a9f5920
[   36.788830] R10: 00007fff774dcd50 R11: 0000000000000246 R12: 00000000c06864a2
[   36.788831] R13: 000000000000000b R14: 0000000000000000 R15: 0000562e2a9f5920
[   36.788834] ---[ end trace 80a9e24b90661253 ]---
```

but for me it occurs during boot. It shows total of for times

```
   $ dmesg | grep -e 'enc1_stream_encoder_dp_blank.*amdgpu'
[   36.788059]  enc1_stream_encoder_dp_blank+0x12c/0x1a0 [amdgpu]
[   37.468369]  enc1_stream_encoder_dp_blank+0x12c/0x1a0 [amdgpu]
[   49.951953]  enc1_stream_encoder_dp_blank+0x12c/0x1a0 [amdgpu]
[   51.122911]  enc1_stream_encoder_dp_blank+0x12c/0x1a0 [amdgpu]
```

```
Linux wsshowmax 4.18.6-arch1-1-ARCH #1 SMP PREEMPT Wed Sep 5 11:54:09 UTC 2018 x86_64 GNU/Linux
```

```
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15d0
	Subsystem: Advanced Micro Devices, Inc. [AMD] Device 15d0
	Flags: fast devsel

00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Device 15d1
	Subsystem: Advanced Micro Devices, Inc. [AMD] Device 15d1
	Flags: fast devsel, IRQ 255
	Capabilities: [40] Secure device <?>
	Capabilities: [64] MSI: Enable- Count=1/4 Maskable- 64bit+
	Capabilities: [74] HyperTransport: MSI Mapping Enable+ Fixed+

00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe Dummy Host Bridge
	Flags: fast devsel

00:01.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 15d3 (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 25
	Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
	I/O behind bridge: 00004000-00004fff [size=4K]
	Memory behind bridge: c0a00000-c0afffff [size=1M]
	Prefetchable memory behind bridge: None
	Capabilities: [50] Power Management version 3
	Capabilities: [58] Express Root Port (Slot+), MSI 00
	Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [c0] Subsystem: Lenovo Device 5122
	Capabilities: [c8] HyperTransport: MSI Mapping Enable+ Fixed+
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Capabilities: [150] Advanced Error Reporting
	Capabilities: [270] Secondary PCI Express <?>
	Capabilities: [2a0] Access Control Services
	Capabilities: [370] L1 PM Substates
	Kernel driver in use: pcieport

00:01.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 15d3 (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 26
	Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
	I/O behind bridge: None
	Memory behind bridge: c0900000-c09fffff [size=1M]
	Prefetchable memory behind bridge: None
	Capabilities: [50] Power Management version 3
	Capabilities: [58] Express Root Port (Slot+), MSI 00
	Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [c0] Subsystem: Lenovo Device 5122
	Capabilities: [c8] HyperTransport: MSI Mapping Enable+ Fixed+
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Capabilities: [150] Advanced Error Reporting
	Capabilities: [270] Secondary PCI Express <?>
	Capabilities: [2a0] Access Control Services
	Capabilities: [370] L1 PM Substates
	Kernel driver in use: pcieport

00:01.4 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 15d3 (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 27
	Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
	I/O behind bridge: 00003000-00003fff [size=4K]
	Memory behind bridge: c0800000-c08fffff [size=1M]
	Prefetchable memory behind bridge: None
	Capabilities: [50] Power Management version 3
	Capabilities: [58] Express Root Port (Slot+), MSI 00
	Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [c0] Subsystem: Lenovo Device 5122
	Capabilities: [c8] HyperTransport: MSI Mapping Enable+ Fixed+
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Capabilities: [150] Advanced Error Reporting
	Capabilities: [270] Secondary PCI Express <?>
	Capabilities: [2a0] Access Control Services
	Capabilities: [370] L1 PM Substates
	Kernel driver in use: pcieport

00:01.6 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 15d3 (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 28
	Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
	I/O behind bridge: 00002000-00002fff [size=4K]
	Memory behind bridge: c0700000-c07fffff [size=1M]
	Prefetchable memory behind bridge: None
	Capabilities: [50] Power Management version 3
	Capabilities: [58] Express Root Port (Slot+), MSI 00
	Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [c0] Subsystem: Lenovo Device 5122
	Capabilities: [c8] HyperTransport: MSI Mapping Enable+ Fixed+
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Capabilities: [150] Advanced Error Reporting
	Capabilities: [270] Secondary PCI Express <?>
	Capabilities: [2a0] Access Control Services
	Capabilities: [370] L1 PM Substates
	Kernel driver in use: pcieport

00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe Dummy Host Bridge
	Flags: fast devsel

00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 15db (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 29
	Bus: primary=00, secondary=05, subordinate=05, sec-latency=0
	I/O behind bridge: 00001000-00001fff [size=4K]
	Memory behind bridge: c0300000-c06fffff [size=4M]
	Prefetchable memory behind bridge: 00000000b0000000-00000000c01fffff [size=258M]
	Capabilities: [50] Power Management version 3
	Capabilities: [58] Express Root Port (Slot-), MSI 00
	Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [c0] Subsystem: Advanced Micro Devices, Inc. [AMD] Device 0000
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Capabilities: [270] Secondary PCI Express <?>
	Kernel driver in use: pcieport

00:08.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 15dc (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 30
	Bus: primary=00, secondary=06, subordinate=06, sec-latency=0
	I/O behind bridge: None
	Memory behind bridge: c0200000-c02fffff [size=1M]
	Prefetchable memory behind bridge: None
	Capabilities: [50] Power Management version 3
	Capabilities: [58] Express Root Port (Slot-), MSI 00
	Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [c0] Subsystem: Advanced Micro Devices, Inc. [AMD] Device 0000
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Capabilities: [270] Secondary PCI Express <?>
	Kernel driver in use: pcieport

00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 61)
	Subsystem: Lenovo FCH SMBus Controller
	Flags: 66MHz, medium devsel
	Kernel driver in use: piix4_smbus
	Kernel modules: i2c_piix4, sp5100_tco

00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 51)
	Subsystem: Lenovo FCH LPC Bridge
	Flags: bus master, 66MHz, medium devsel, latency 0

00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15e8
	Flags: fast devsel

00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15e9
	Flags: fast devsel

00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15ea
	Flags: fast devsel

00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15eb
	Flags: fast devsel
	Kernel driver in use: k10temp
	Kernel modules: k10temp

00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15ec
	Flags: fast devsel

00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15ed
	Flags: fast devsel

00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15ee
	Flags: fast devsel

00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 15ef
	Flags: fast devsel

01:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8822BE 802.11a/b/g/n/ac WiFi adapter
	Subsystem: Lenovo RTL8822BE 802.11a/b/g/n/ac WiFi adapter
	Flags: bus master, fast devsel, latency 0, IRQ 79
	I/O ports at 4000 [size=256]
	Memory at c0a00000 (64-bit, non-prefetchable) [size=64K]
	Capabilities: [40] Power Management version 3
	Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [70] Express Endpoint, MSI 00
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [148] Device Serial Number 00-e0-4c-ff-fe-b8-22-01
	Capabilities: [158] Latency Tolerance Reporting
	Capabilities: [160] L1 PM Substates
	Kernel driver in use: r8822be
	Kernel modules: r8822be

02:00.0 Non-Volatile memory controller: Lenovo Device 0006 (prog-if 02 [NVM Express])
	Subsystem: Lenovo Device 1006
	Flags: bus master, fast devsel, latency 0, IRQ 31, NUMA node 0
	Memory at c0900000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [40] Power Management version 3
	Capabilities: [70] Express Endpoint, MSI 00
	Capabilities: [b0] MSI-X: Enable+ Count=19 Masked-
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [148] Device Serial Number 00-00-00-00-00-00-00-00
	Capabilities: [158] Power Budgeting <?>
	Capabilities: [168] Alternative Routing-ID Interpretation (ARI)
	Capabilities: [178] Secondary PCI Express <?>
	Capabilities: [2b8] Latency Tolerance Reporting
	Capabilities: [2c0] L1 PM Substates
	Kernel driver in use: nvme

03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0e)
	Subsystem: Lenovo RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
	Flags: bus master, fast devsel, latency 0, IRQ 71
	I/O ports at 3400 [size=256]
	Memory at c0814000 (64-bit, non-prefetchable) [size=4K]
	Memory at c0800000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [40] Power Management version 3
	Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
	Capabilities: [70] Express Endpoint, MSI 01
	Capabilities: [b0] MSI-X: Enable+ Count=4 Masked-
	Capabilities: [d0] Vital Product Data
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Virtual Channel
	Capabilities: [160] Device Serial Number 01-00-00-00-68-4c-e0-00
	Capabilities: [170] Latency Tolerance Reporting
	Capabilities: [178] L1 PM Substates
	Kernel driver in use: r8169
	Kernel modules: r8169

03:00.1 Serial controller: Realtek Semiconductor Co., Ltd. Device 816a (rev 0e) (prog-if 02 [16550])
	Subsystem: Lenovo Device 5122
	Flags: fast devsel, IRQ 31
	I/O ports at 3200 [size=256]
	Memory at c0815000 (64-bit, non-prefetchable) [size=4K]
	Memory at c0804000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [40] Power Management version 3
	Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
	Capabilities: [70] Express Endpoint, MSI 01
	Capabilities: [b0] MSI-X: Enable- Count=4 Masked-
	Capabilities: [d0] Vital Product Data
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [160] Device Serial Number 00-00-00-00-00-00-00-00
	Capabilities: [170] Latency Tolerance Reporting
	Capabilities: [178] L1 PM Substates

03:00.2 Serial controller: Realtek Semiconductor Co., Ltd. Device 816b (rev 0e) (prog-if 02 [16550])
	Subsystem: Lenovo Device 5122
	Flags: fast devsel, IRQ 31
	I/O ports at 3100 [size=256]
	Memory at c0816000 (64-bit, non-prefetchable) [size=4K]
	Memory at c0808000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [40] Power Management version 3
	Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
	Capabilities: [70] Express Endpoint, MSI 01
	Capabilities: [b0] MSI-X: Enable- Count=4 Masked-
	Capabilities: [d0] Vital Product Data
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [160] Device Serial Number 00-00-00-00-00-00-00-00
	Capabilities: [170] Latency Tolerance Reporting
	Capabilities: [178] L1 PM Substates

03:00.3 IPMI Interface: Realtek Semiconductor Co., Ltd. Device 816c (rev 0e) (prog-if 01 [KCS])
	Subsystem: Lenovo Device 5122
	Flags: fast devsel, IRQ 11
	I/O ports at 3000 [size=256]
	Memory at c0817000 (64-bit, non-prefetchable) [size=4K]
	Memory at c080c000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [40] Power Management version 3
	Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
	Capabilities: [70] Express Endpoint, MSI 01
	Capabilities: [b0] MSI-X: Enable- Count=4 Masked-
	Capabilities: [d0] Vital Product Data
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [160] Device Serial Number 00-00-00-00-00-00-00-00
	Capabilities: [170] Latency Tolerance Reporting
	Capabilities: [178] L1 PM Substates
	Kernel modules: ipmi_si

03:00.4 USB controller: Realtek Semiconductor Co., Ltd. Device 816d (rev 0e) (prog-if 20 [EHCI])
	Subsystem: Lenovo Device 5122
	Flags: bus master, fast devsel, latency 0, IRQ 51
	Memory at c0818000 (32-bit, non-prefetchable) [size=4K]
	Memory at c0810000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [40] Power Management version 3
	Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
	Capabilities: [70] Express Endpoint, MSI 01
	Capabilities: [b0] MSI-X: Enable- Count=4 Masked-
	Capabilities: [d0] Vital Product Data
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [160] Device Serial Number 00-00-00-00-00-00-00-00
	Capabilities: [170] Latency Tolerance Reporting
	Capabilities: [178] L1 PM Substates
	Kernel driver in use: ehci-pci
	Kernel modules: ehci_pci

04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)
	Subsystem: Lenovo RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
	Flags: bus master, fast devsel, latency 0, IRQ 73
	I/O ports at 2000 [size=256]
	Memory at c0704000 (64-bit, non-prefetchable) [size=4K]
	Memory at c0700000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [40] Power Management version 3
	Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
	Capabilities: [70] Express Endpoint, MSI 01
	Capabilities: [b0] MSI-X: Enable+ Count=4 Masked-
	Capabilities: [d0] Vital Product Data
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Virtual Channel
	Capabilities: [160] Device Serial Number 01-00-00-00-68-4c-e0-00
	Capabilities: [170] Latency Tolerance Reporting
	Capabilities: [178] L1 PM Substates
	Kernel driver in use: r8169
	Kernel modules: r8169

05:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series] (rev d0) (prog-if 00 [VGA controller])
	Subsystem: Lenovo Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series]
	Flags: bus master, fast devsel, latency 0, IRQ 50
	Memory at b0000000 (64-bit, prefetchable) [size=256M]
	Memory at c0000000 (64-bit, prefetchable) [size=2M]
	I/O ports at 1000 [size=256]
	Memory at c0600000 (32-bit, non-prefetchable) [size=512K]
	[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
	Capabilities: [48] Vendor Specific Information: Len=08 <?>
	Capabilities: [50] Power Management version 3
	Capabilities: [64] Express Legacy Endpoint, MSI 00
	Capabilities: [a0] MSI: Enable+ Count=1/4 Maskable- 64bit+
	Capabilities: [c0] MSI-X: Enable- Count=3 Masked-
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Capabilities: [200] Resizable BAR <?>
	Capabilities: [270] Secondary PCI Express <?>
	Capabilities: [2b0] Address Translation Service (ATS)
	Capabilities: [2c0] Page Request Interface (PRI)
	Capabilities: [2d0] Process Address Space ID (PASID)
	Capabilities: [320] Latency Tolerance Reporting
	Kernel driver in use: amdgpu
	Kernel modules: amdgpu

05:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Device 15de
	Subsystem: Lenovo Device 5122
	Flags: bus master, fast devsel, latency 0, IRQ 76
	Memory at c0688000 (32-bit, non-prefetchable) [size=16K]
	Capabilities: [48] Vendor Specific Information: Len=08 <?>
	Capabilities: [50] Power Management version 3
	Capabilities: [64] Express Legacy Endpoint, MSI 00
	Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel

05:00.2 Encryption controller: Advanced Micro Devices, Inc. [AMD] Device 15df
	Subsystem: Lenovo Device 5122
	Flags: fast devsel, IRQ 11
	Memory at c0500000 (32-bit, non-prefetchable) [size=1M]
	Memory at c068c000 (32-bit, non-prefetchable) [size=8K]
	Capabilities: [48] Vendor Specific Information: Len=08 <?>
	Capabilities: [50] Power Management version 3
	Capabilities: [64] Express Endpoint, MSI 00
	Capabilities: [a0] MSI: Enable- Count=1/2 Maskable- 64bit+
	Capabilities: [c0] MSI-X: Enable- Count=2 Masked-
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>

05:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15e0 (prog-if 30 [XHCI])
	Subsystem: Lenovo Device 5122
	Flags: bus master, fast devsel, latency 0, IRQ 52
	Memory at c0300000 (64-bit, non-prefetchable) [size=1M]
	Capabilities: [48] Vendor Specific Information: Len=08 <?>
	Capabilities: [50] Power Management version 3
	Capabilities: [64] Express Endpoint, MSI 00
	Capabilities: [a0] MSI: Enable- Count=1/8 Maskable- 64bit+
	Capabilities: [c0] MSI-X: Enable+ Count=8 Masked-
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Kernel driver in use: xhci_hcd
	Kernel modules: xhci_pci

05:00.4 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15e1 (prog-if 30 [XHCI])
	Subsystem: Lenovo Device 5122
	Flags: bus master, fast devsel, latency 0, IRQ 49
	Memory at c0400000 (64-bit, non-prefetchable) [size=1M]
	Capabilities: [48] Vendor Specific Information: Len=08 <?>
	Capabilities: [50] Power Management version 3
	Capabilities: [64] Express Endpoint, MSI 00
	Capabilities: [a0] MSI: Enable- Count=1/8 Maskable- 64bit+
	Capabilities: [c0] MSI-X: Enable+ Count=8 Masked-
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Kernel driver in use: xhci_hcd
	Kernel modules: xhci_pci

05:00.6 Audio device: Advanced Micro Devices, Inc. [AMD] Device 15e3
	Subsystem: Lenovo Device 5122
	Flags: bus master, fast devsel, latency 0, IRQ 77
	Memory at c0680000 (32-bit, non-prefetchable) [size=32K]
	Capabilities: [48] Vendor Specific Information: Len=08 <?>
	Capabilities: [50] Power Management version 3
	Capabilities: [64] Express Endpoint, MSI 00
	Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel

06:00.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] (rev 61) (prog-if 01 [AHCI 1.0])
	Subsystem: Lenovo FCH SATA Controller [AHCI mode]
	Flags: bus master, fast devsel, latency 0, IRQ 54
	Memory at c0200000 (32-bit, non-prefetchable) [size=2K]
	Capabilities: [48] Vendor Specific Information: Len=08 <?>
	Capabilities: [50] Power Management version 3
	Capabilities: [64] Express Endpoint, MSI 00
	Capabilities: [a0] MSI: Enable+ Count=1/2 Maskable- 64bit+
	Capabilities: [d0] SATA HBA v1.0
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Capabilities: [270] Secondary PCI Express <?>
	Kernel driver in use: ahci
	Kernel modules: ahci


```

If more information is needed, I would be happy to provide :)

Hi Paul, can you please explain what you did by "when switching the inputs of the monitor (two systems are connected)"?

(In reply to Jerry Zuo from comment #3)
> Hi Paul, can you please explain what you did by "when switching the inputs
> of the monitor (two systems are connected)"?

The monitor has several inputs. Over the OSD (on-screen display) you can tell the monitor what input signal it should display (or the monitor auto-senses it itself). Hopefully, that makes sense.

Thank you. You connect both HDMI and DP to UP3214 with DP1.2 enabled, switch back and forth, and the warning is showing up. When the warning is observed, a delay is also observed. Am I right?

I got it. Thanks.

Can you clarify the problem you're observing?

Do all the displays go blank after switching inputs?

(In reply to Nicholas Kazlauskas from comment #7)
> Can you clarify the problem you're observing?
> 
> Do all the displays go blank after switching inputs?

There is exactly one monitor/display.

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