[Bug 59834] [ILK]I-G-T/kms_flip subtest: 'wf_vblank-vs-modeset' fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=59834

--- Comment #6 from shui yangwei <yangweix.shui at intel.com> ---
(In reply to comment #5)
> (In reply to comment #4)
> > (In reply to comment #3)
> > > (In reply to comment #2)
> > > > One way I can reproduce this on current nightly 100% on IVB if the console
> > > > is blanked when I start the test:
> > > > 
> > > > # echo 1 > /sys/class/graphics/fb0/blank
> > > > # kms_flip --run-subtest wf_vblank-vs-modeset
> > > > 
> > > > Could you yanbing try this too?
> > > 
> > > Could you also try the patch attached to bug #60002?
> > 
> > I apply this patch on -nightly top, then loop running this case 20 times,
> > all passed, I double checked ILK and IVB platform, Both worked well. But I
> > don't know whether it's enough to judge this bug is fixed, because I see
> > yanbing describe that this issue is not stable reproduced.
> 
> Yes, you are right mine is a separate test case, I can only guess that the
> root cause is the same.
> 
> The next step would be to do Yanbing's original sequence with the patch
> applied..

I just according to yanbing's original sequence, and can't reproduce this bug,
I  have reproduced on -fixes latest kernel, and is easy to come up this issue.
So I think probably this patch really worked, you can apply the patch ,and if
our nightly can't catch the error for a period, then we can close this bug.

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