[Bug 101623] [IGT][BDW] kms_frontbuffer_tracking at fbc-*draw* has inconsistent results

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101623

--- Comment #10 from Marta Löfstedt <marta.lofstedt at intel.com> ---
If I run the kms_frontbuffer_tracking tests from the current IGT on a 4.2
vanilla kernel (4.2 was release around the time when igt at 64590c7b7 was merged)
all tests fail.

If I run igt at 64590c7b7 on 4.2 kernel some of the pinpointed test consistently
fail others consistently pass.

If I run igt at 64590c7b7 on 4.13-rc3 kernel all kms_frontbuffer_tracking tests
fail.

So, in a we do indeed have a regression here. However, it seems that both the
tests and the kernel have diverged so much during 2 years that it will not make
sense to do a bisect.

Instead I will need to do some timing experiments to see what is actually going
on.

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