[Bug 946899] Re: [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung

[Alessio]

Ubuntu 12.04.2LTS on Intel i3-2120 with integrated hd2000 gpu

I never had this problem before, but after yesterday kernel update
(3.5.0-26-generic) after few minutes dmesg start to show this error
messages

[  175.345408] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
[  175.345412] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state
[  175.348230] [drm] Enabling RC6 states: RC6 off, RC6p off, RC6pp off
[  200.244562] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
[  200.244844] [drm] Enabling RC6 states: RC6 off, RC6p off, RC6pp off

after about an hour Xorg hangs I can only move the mouse pointer


I attached /sys/kernel/debug/dri/0/i915_error_state

** Attachment added: "/sys/kernel/debug/dri/0/i915_error_state"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/946899/+attachment/3585652/+files/i915_error_state

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https://bugs.launchpad.net/bugs/946899

Title:
  [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU
  hung

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