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Subjecti915_hangcheck_hung problem with 3.8-rc2+ (Linus's latest tree)
Hi all,

I've hit this 3 times today on Linus's latest 3.8-rc2+ tree:

[11868.414648] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
[11868.414655] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state
[11870.408342] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
[11870.408412] [drm:i915_reset] *ERROR* GPU hanging too fast, declaring wedged!
[11870.408414] [drm:i915_reset] *ERROR* Failed to reset chip.
[11883.083225] gnome-shell[19396]: segfault at 218 ip 00007feef5f32333 sp 00007ffffc1dc930 error 4 in[7feef5ecb000+d0000]

When it happens, gnome-shell dies a horrible death and it requires a
reboot in order to get xorg working properly again (probably because
gnome-shell is hosed.)

The machine does still work to do other things from a text console (I'm
writing this on the machine after the last time this happened.)

It seems to happen when doing a "stressful" thing on the machine (i.e.
multiple kernel builds at the same time).

I also seem to be able to hit this on 3.7.1, but not as regularly, and
not at all on 3.6.y.

Any hints or ideas of what to try out?


greg k-h

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