The issue reproduced again, some time after I have unplugged the
notebook from the docking station, then connected, and finally
disconnected the D-SUB vga connector. I should have the newest bios
installed:
$ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
L77 Ver. 01.33
07/20/2015
The relevant dmesg messages:
Notebook got disconnected from the docking station:
[21032.211507] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
alignment
[21032.224120] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
alignment
[21032.226734] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
alignment
[21032.226997] acpi PNP0501:00: Still not present
[21032.227373] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
alignment
Then, after some time and after DSUB connect and disconnect:
[22058.949238] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR*
uncleared pch fifo underrun on pch transcoder A
[22058.949264] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH
transcoder A FIFO underrun
[22058.964980] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
uncleared fifo underrun on pipe B
[22058.964997] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun
[24580.055198] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to enable
link training
[24580.060997] [drm:intel_dp_complete_link_train [i915]] *ERROR* failed to
start channel equalization
** Changed in: xorg (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/1509355
Title:
xorg crashes because of intel gpu driver
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