I'm using ubunutu 15.10 with the nvidia blob driver and when plugging in the external monitor using unity, unity quits and I am greeted with the login screen. [ 14.272749] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 14.272816] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 14.272862] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 14.272906] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 14.272951] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 14.273110] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 14.273252] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 14.273298] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 14.379592] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready [ 14.425157] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 14.614149] IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready [ 14.639431] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 14.639638] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 14.639835] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 14.640004] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 17.953797] Bluetooth: RFCOMM TTY layer initialized [ 17.953804] Bluetooth: RFCOMM socket layer initialized [ 17.953807] Bluetooth: RFCOMM ver 1.11 [ 17.982058] e1000e: enp0s25 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None [ 17.982149] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s25: link becomes ready [ 40.845621] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A [ 40.845662] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun [ 40.847192] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe B [ 40.847232] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun [ 40.995011] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 41.034905] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 41.035010] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 41.035096] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 41.035171] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 41.035234] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 41.035403] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 41.035559] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 41.035617] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 41.099075] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95) [ 42.633352] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A [ 42.633368] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun [ 42.641986] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe B [ 42.641999] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun [ 44.506683] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A [ 44.506699] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun [ 44.516557] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe B [ 44.516574] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun [ 59.152180] show_signal_msg: 39 callbacks suppressed [ 59.152185] compiz[2643]: segfault at 7f1ecdcea5c0 ip 00007f1ecbcc81cb sp 00007ffcbebb82a0 error 4 in libc-2.21.so[7f1ecbc49000+1c0000] [ 60.694512] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A [ 60.694527] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun [ 60.705547] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe B [ 60.705560] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun [ 62.500059] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A [ 62.500072] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun [ 62.511028] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe B [ 62.511037] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
From #intel-gfx: < ickle> so Xorg.0.log, lightdm logs, xsession-errors anything that has the actual crash
Created attachment 119986 [details] Xorg [ 53.828] (--) NVIDIA(GPU-0): DFP-0: disconnected [ 53.828] (--) NVIDIA(GPU-0): DFP-0: Internal TMDS [ 53.828] (--) NVIDIA(GPU-0): DFP-0: 165.0 MHz maximum pixel clock [ 53.828] (--) NVIDIA(GPU-0): [ 53.829] (--) NVIDIA(GPU-0): DFP-1: disconnected [ 53.829] (--) NVIDIA(GPU-0): DFP-1: Internal DisplayPort [ 53.829] (--) NVIDIA(GPU-0): DFP-1: 960.0 MHz maximum pixel clock [ 53.829] (--) NVIDIA(GPU-0): [ 53.836] (II) XKB: reuse xkmfile /var/lib/xkb/server-B20D7FC79C7F597315E3E501AEF10E0D866E8E92.xkm [ 55.165] (EE) [ 55.165] (EE) Backtrace: [ 55.165] (EE) 0: /usr/bin/X (xorg_backtrace+0x4e) [0x55ac7781e62e] [ 55.165] (EE) 1: /usr/bin/X (0x55ac7766a000+0x1b8999) [0x55ac77822999] [ 55.165] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f5fc14bf000+0x352f0) [0x7f5fc14f42f0] [ 55.166] (EE) 3: /usr/bin/X (DamageRegister+0x11) [0x55ac777a53a1] [ 55.166] (EE) 4: /usr/bin/X (0x55ac7766a000+0xd9ac8) [0x55ac77743ac8] [ 55.166] (EE) 5: /usr/bin/X (BlockHandler+0x8a) [0x55ac776c6cca] [ 55.166] (EE) 6: /usr/bin/X (WaitForSomething+0x163) [0x55ac7781b393] [ 55.166] (EE) 7: /usr/bin/X (0x55ac7766a000+0x57fa1) [0x55ac776c1fa1] [ 55.166] (EE) 8: /usr/bin/X (0x55ac7766a000+0x5c34b) [0x55ac776c634b] [ 55.166] (EE) 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f5fc14dfa40] [ 55.166] (EE) 10: /usr/bin/X (_start+0x29) [0x55ac776b06c9] [ 55.166] (EE) [ 55.166] (EE) Segmentation fault at address 0x10 [ 55.166] (EE) Fatal server error: [ 55.166] (EE) Caught signal 11 (Segmentation fault). Server aborting [ 55.166] (EE) [ 55.166] (EE) Please consult the The X.Org Foundation support at http://wiki.x.org for help. [ 55.166] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information. [ 55.166] (EE) [ 55.188] (EE) Server terminated with error (1). Closing log file.
Bug #76921 [1] contains the “same” backtrace. [1] https://bugs.freedesktop.org/76921
In #intel-gfx@irc.freenode the user ickle responded, that the crash is unrelated to the Intel drivers and suspects the modesetting driver or the proprietary NVIDIA driver. Regarding the Linux i915 errors, a separate bug report should be submitted.
The crash is between -modesetting and -nvidia. Presuming -modesetting/core for next step in analysis.
Ok, having nothing plugged in, then populating the DisplayPort the external monitor turned on. Then plugging in the VGA cable and switching to the VGA input it didn’t crash. Chris, thank you for updating this report!
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