[Bug 63921] [snb] GTT mapping fails after GPU hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=63921

--- Comment #27 from Nicolas Hillegeer <nicolashillegeer at gmail.com> ---
(In reply to comment #26)
> (In reply to comment #25)
> > (In reply to comment #23)
> > > I work on drm-intel-next[-queued] which is now post-3.10:
> > > http://cgit.freedesktop.org/~danvet/drm-intel
> > 
> > Alright. I guess I'll keep working on 3.9 then (unless you think it's
> > important I change) and just backport  your changes. So that if (when) this
> > is fixed I have a reasonably stable kernel on which I can run my video
> > player :). I'm currently testing with SNA, so hopefully if it crashes it
> > will do so in about 30 minutes.
> > 
> > I already manually backported the changes, compiled and am running. If it
> > crashes, I'll report, add the extra fix, recompile and test again.
> 
> Just to make sure, there are crashes with and without:
> 
> '[ 4366.361686] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed...
> GPU hung'
> 
> in dmesg?
> 
> Please always check the dmesg after crash and report if above line is
> present and if it is try to get error state (if we would be so lucky).

I mostly check dmesg and I can confirm that the line is always there. Right now
it just crashed again, I will upload the lines with 'drm' in them from dmesg so
you can see. I will also upload the newest Xorg.0.log.

@Chris: so it crashes as well with the first patch you gave me. I'll see if the
fifth check helps now.

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