Re: "Hangcheck timer elapsed... GPU hung" in 3.8.0-rc2
From: Daniel Vetter
Date: Sun Jan 06 2013 - 13:04:50 EST
On Thu, Jan 03, 2013 at 06:11:23PM -0500, J. Bruce Fields wrote:
> On Thu, Jan 03, 2013 at 04:16:24PM -0500, Josh Boyer wrote:
> > On Thu, Jan 3, 2013 at 3:46 PM, J. Bruce Fields <bfields@xxxxxxxxxxxx> wrote:
> > > I got a crash after a few minutes of running 3.8.0-rc2, was able to
> > > switch to a vt and look at dmesg:
> > >
> > > [ 490.962545] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
> > > [ 490.963019] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state
> > > [ 492.961446] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
> > > [ 492.965613] [drm:i915_reset] *ERROR* GPU hanging too fast, declaring wedged!
> > > [ 492.965621] [drm:i915_reset] *ERROR* Failed to reset chip.
> > >
> > > Previously I was on 3.6.10-2.fc17.x86_64, which didn't have any such
> > > problem.
> > I'm not questioning that you haven't seen that error in F17, but we have
> > had quite a few bug reports with similar error messages for a while now.
> > Apparently there are lots of ways GPUs can get hung, so they might be
> > different from what you're seeing. Just wanted to point out that it
> > might not be a new 3.8 change that caused it.
> OK, sure. It reproduced very quickly after the upgrade, so I assumed it
> was a regression.
> I'm running 3.7.0 now which hasn't shown any problem.
> I'll try a newer kernel again to see if it's really that easy for me to
If you hit this again (even better if you have a way to reproduce) please
grab the i915_error_state file from debugfs and file a bug on
bugs.freedesktop.org against DRM - DRI (Intel). We do know of a few recent
issues introduced around 3.7 kernels, preliminary patches are floating
around. The error state should be good enough to decide whether you're
hitting the same issues.
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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