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[noisymime <601530@xxxxxxxxxxxxxxxxxx>]

I'm seeing the same thing on Maverick () with GM45. Previously Lucid had
been fine.

When it occurs the mouse cursor remains responsive, but everything else is locked up. Switching to a VT shows the following repeating:
[drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung

Xorg log shows:

[ 11405.592] (EE) intel(0): Failed to submit batch buffer, expect rendering corruption or even a frozen display: Input/output error.
[ 11405.916] (EE) intel(0): Failed to submit batch buffer, expect rendering corruption or even a frozen display: Input/output error.
[ 11406.888] (EE) intel(0): Failed to submit batch buffer, expect rendering corruption or even a frozen display: Input/output error.
[ 11408.209] (EE) intel(0): Failed to submit batch buffer, expect rendering corruption or even a frozen display: Input/output error.
[ 11408.905] (EE) intel(0): Failed to submit batch buffer, expect rendering corruption or even a frozen display: Input/output error.
[ 11409.334] (WW) intel(0): get vblank counter failed: Invalid argument
[ 11409.338] (WW) intel(0): get vblank counter failed: Invalid argument
[ 11409.338] (WW) intel(0): first get vblank counter failed: Invalid argument
[ 11409.642] (EE) intel(0): Failed to submit batch buffer, expect rendering corruption or even a frozen display: Input/output error.

These same 3 lines repeat indefinitely, in no particular order.

-- 
[965gm] drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiting 150858 at 150857)
https://bugs.launchpad.net/bugs/601530
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