[Bug 67243] [ILK]igt/kms_render/gpu-blit randomly causes system hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67243

--- Comment #15 from Imre Deak <imre.deak at gmail.com> ---
Created attachment 85064
  --> https://bugs.freedesktop.org/attachment.cgi?id=85064&action=edit
disable steps one-by-one

(In reply to comment #14)
> (In reply to comment #13)
> [...]
> I test with these two patches, It happens in the fourth cycle.
> output:
> [...]
> Beginning test gpu-blit with 1366x768 @ 40Hz / XRGB8888 on pipe A, encoder
> TMDS, connector eDP
> Test gpu-blit with 1366x768 @ 40Hz / XRGB8888 on pipe A, encoder TMDS,
> connector eDP: PASSED

Hm, unless the output is shortened somehow, the above one and your earlier
dmesg seems to suggest that the hang happens during kmstest_remove_fb(), but
we'd need to instrument the kernel to find the exact place.

Before that we could try to narrow down things by disabling each test step.
Could you try applying the attached disable patches and see with which ones the
gpu-blit test stops hanging (if at all :P)? First with patch 1, then patch 1+2,
then 1+2+3 etc.

Thanks.

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