[Mesa-dev] Sandy Bridge heisenbug

[Ian Pilcher]

On 04/01/2011 02:09 AM, Dave Airlie wrote:
> 
> try the latest mesa in koji,
> 
> I' ve pushed some reverts in,
> 
> https://bugs.freedesktop.org/show_bug.cgi?id=35853
> 
> is upstream bug.
> 

That appears to have made things worse.

With mesa-dri-drivers-7.11-0.3.20110330.0.fc15.x86_64 I get:

Apr  1 11:38:18 ian kernel: [   77.890422] [drm:i915_hangcheck_elapsed]
*ERROR* Hangcheck timer elapsed... GPU hung
Apr  1 11:38:18 ian kernel: [   77.892175] [drm:i915_do_wait_request]
*ERROR* i915_do_wait_request returns -11 (awaiting 4284 at 4281, next 4285)
Apr  1 11:38:25 ian kernel: [   84.254124] [drm:i915_hangcheck_elapsed]
*ERROR* Hangcheck timer elapsed... GPU hung
Apr  1 11:38:25 ian kernel: [   84.254161] [drm:i915_do_wait_request]
*ERROR* i915_do_wait_request returns -11 (awaiting 4529 at 4525, next 4530)
Apr  1 11:38:31 ian kernel: [   90.585892] [drm:i915_hangcheck_elapsed]
*ERROR* Hangcheck timer elapsed... GPU hung
Apr  1 11:38:31 ian kernel: [   90.585925] [drm:i915_do_wait_request]
*ERROR* i915_do_wait_request returns -11 (awaiting 4664 at 4661, next 4666)

And then KWin disables desktop effects.

With mesa-dri-drivers-7.11-0.5.20110401.0.fc15.x86_64 I get fewer error
messages:

Apr  1 11:33:52 ian kernel: [  272.178080] [drm:i915_hangcheck_elapsed]
*ERROR* Hangcheck timer elapsed... GPU hung
Apr  1 11:33:52 ian kernel: [  272.179796] [drm:i915_do_wait_request]
*ERROR* i915_do_wait_request returns -11 (awaiting 10986 at 10979, next
11027)
Apr  1 11:33:59 ian kernel: [  278.725439] [drm:i915_hangcheck_elapsed]
*ERROR* Hangcheck timer elapsed... GPU hung
Apr  1 11:33:59 ian kernel: [  278.725481] [drm:i915_do_wait_request]
*ERROR* i915_do_wait_request returns -11 (awaiting 11895 at 11862, next
11896)

But KWin never recovers.  I can see gkrellm chugging along, but I'm
unable do actually do anything in X.

(Note, however, that the system is still OK.  I can ssh in, downgrade
the mesa packages, restart X, and be up and running.)

Looks like I will be bisecting ...

-- 
========================================================================
Ian Pilcher                                         arequipeno at gmail.com
"If you're going to shift my paradigm ... at least buy me dinner first."
========================================================================