[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 #11 from Martin Peres <martin.peres at free.fr> ---
(In reply to krisman from comment #10)
> (In reply to Petri Latvala from comment #9)
> > The test is doing some suboptimal things. It first does the suspend/resume
> > cycle, and then checks if the tested pipe has valid connectors, so it will
> > suspend anyway even when it will skip.
> 
> For the record, I submitted a patch to address the issue with the test
> suspending before skipping.  Petri already reviewed and pushed to igt.
> 
> 31f71d62d5ff ("igt/kms_pipe_crc_basic: Skip test before system suspend")

Thanks for this! Reducing the noise and the execution time is a Yay from me :)

> 
> > In the case of CI_DRM_2699, there were about 3 successful suspend/resumes
> > before suspend-read-crc-pipe-b came along where the DUT never recovered from
> > the suspend. The point being here that it's the suspend/resume that jams,
> > not this particular subtest.
> 
> Agreed.  The issue is more related to the recovery of the suspend than the
> read_crc itself.  Just need to mention, though, that bsw-n3050 has
> connectors attached, as well as VGA, meaning that it's not a case where my
> patch will make igt skip.

Right, I will still close the bug as the issue is somewhere else than our
driver...


> 
> We are also discussing on the list a way to reduce the overhead provoked by
> the thousands of dp_aux_ch timeout messages below:
> 
> [drm:intel_dp_aux_ch [i915]] dp_aux_ch timeout status 0x71450064

Right, any success on that?

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