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[David Perkinson <601530@xxxxxxxxxxxxxxxxxx>]

I seem to be having the same problem on a Lenovo X200 tablet.  I get the
error after using a projector (setting it up with xrandr) then putting
the computer to sleep.  It freezes when I try to wake it up, forcing me
to reboot.  The problem started after upgrading from 10.04 to 10.10.

>> uname -av

Linux xyzzy 2.6.35-25-generic #44-Ubuntu SMP Fri Jan 21 17:40:44 UTC
2011 x86_64 GNU/Linux


>From kern.log:

Feb  7 10:17:55 xyzzy kernel: [32788.390039] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
Feb  7 10:17:55 xyzzy kernel: [32788.390055] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiti
ng 70 at 53)
Feb  7 10:17:56 xyzzy kernel: [32789.170035] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
Feb  7 10:17:56 xyzzy kernel: [32789.170585] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiti
ng 74 at 53)

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https://bugs.launchpad.net/bugs/601530

Title:
  [965gm] drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns
  -5 (awaiting 150858 at 150857)