[Bug 58899] [HSW] GPU hung when start X on ubuntu 12.04

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=58899

--- Comment #10 from Ouping Zhang <ouping.zhang at intel.com> ---
We can find a good commit.
Kernel: (drm-intel-nightly)cdb96764a45f87e4614df1b16d68b2ccb9806f57 good
Kernel: (drm-intel-nightly)071f0a705c081ed6b1d61b6fa8be969a5b15ddf8 bad
But now the good commit"cdb96764a45f87e4614df1b16d68b2ccb9806f57" can't find in
the branch drm-intel-nightly any more.
With the latest kernel, the issue still can be reproduced. But if adding
"drm.debug=0xe" in kernel command line, this issue can't be reproduced.

(In reply to comment #9)
> Was it the same symptomatic incoherency? With the regression suggestion, is
> it then bisectable? The symptom suggested a missing w/a or sync-flush, the
> regression tag suggests potentially otherwise.

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