[Bug 73383] [IVB/HSW ppgtt bisected] When run nightly piglit testing causes X no responsive

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73383

--- Comment #29 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
I'll just add my latest observations here even though this bug is already
closed.

I wanted to re-test this bug again, but I was unable to reproduce it. The
reason turned out to be my Mesa tree which I'd moved forward since the last
time I tested this bug.

Mesa HEAD as here
 commit 80c1b9349c861cc023c4f25c329a3c0ed4695b9e
 Author: Kenneth Graunke <kenneth at whitecape.org>
 Date:   Tue Feb 25 12:21:41 2014 -0800

    i965: Convert VUE map generation checks to if rather than switch.

when I was unable to reproduce the bug.

So I rolled Mesa back to
 commit 8c4a9f631d7438aeaf56785401891d0773792123
 Author: Kenneth Graunke <kenneth at whitecape.org>
 Date:   Mon Nov 11 18:30:32 2013 -0800

    i965: Emit 3DSTATE_VF on Broadwell too.

and then I was able to reproduce it again using GpuTest.

But the good news is that it looks like Chris has managed to fix the issue with
this patch:
http://lists.freedesktop.org/archives/intel-gfx/2014-March/041576.html

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