Just an update on the behavior of this bug.

About a week ago, there was an update installed by Update Manager that
resolved (for me) the issue of Unity crashing.  The problem with the
screen resolution spontaneously changing was still present, but at least
it was usable.

Yesterday, Update Manager installed a new set of updates, and the
regression is back.  It's gone back to nearly unusable.

I'm going to have to break down and reinstall 11.10 and hope that the
video issues with 12.04 get resolved pretty soon.

While running Firefox makes the breakage happen extremely quickly, I
have seen in the last day the breakage happen even with nothing but
Thunderbird running.  In this scenario, the Unit decoration and launcher
bar went away, AND all menus became empty.  The menu would still create
a box, but the box was empty.

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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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