[Bug 100989] [BAT][BSW] igt at kms_pipe_crc_basic@suspend-read-crc-pipe-b hung in CI

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100989

--- Comment #1 from krisman at collabora.co.uk ---
(In reply to Martin Peres from comment #0)
> On CI_DRM_2600, the machine fi-bsw-n3050 hung on
> igt at kms_pipe_crc_basic@suspend-read-crc-pipe-b.
> 
> This may be related to the thousands of "[drm:intel_dp_aux_ch [i915]]
> dp_aux_ch timeout status 0x71450064" found in the logs.
> 
> Full logs:
> https://intel-gfx-ci.01.org/CI/CI_DRM_2600/fi-bsw-n3050/
> igt at kms_pipe_crc_basic@suspend-read-crc-pipe-b.html

The hpd task is completing ok as far as I understand.  we can try the patch
that I mentioned in Bug 100215 to see if it helps[1] but I don't think it will
fix it.  Did the system hard hanged or just the IGT task? Also did it get back
from the suspend?  I think I saw some hangs while reading CRC that I couldn't
reproduce anymore on SNB or SKLs (not sure), I'll give it another try.

Thanks, 

[1] https://patchwork.freedesktop.org/patch/151486/

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