Linux pbo-laptop 3.10.0-031000rc5-generic #201306082135 SMP Sun Jun 9
01:36:22 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

A 5 second hang just occurred, everything unresponsive for 5 seconds,
and then resumed to normal behaviour. Better than locking completely up
but still annoying.

dmesg:
[12670.344064] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU 
hung

Attached is my i915_error_state. Running Ubuntu 13.04 with Bumblebee,
nvidia deactivated through Bumblebee.

** Attachment added: "i915_error_state"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1140716/+attachment/3701419/+files/i915_error_state

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https://bugs.launchpad.net/bugs/1140716

Title:
  [regression] 3.5.0-26-generic and  3.2.0-39-generic GPU hangs on
  Sandybridge

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