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[Frode Svendsen <775060@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 740126 ***
    https://bugs.launchpad.net/bugs/740126

I have the exact same problem, using an Ati HD3650 graphics card on a HP
EliteBook. As #740126 seems to be related to Intel only I can't see that
this is a duplicate.

In my case, this will happen very randomly and in Ubuntu Classic only, I
have so far not experienced the bug in Unity. The screen will freeze,
normally as I am working on something (no discernable pattern) and I'm
left with a mousepointer which is context-sensitive even though I'm
unable to interract with the OS. Shifting to a different display/console
(Ctrl-Alt-F#) while using external dual-screens will result in black
screens. Changing back I have a graphical glitch covering a square
around where the mouse-pointer is at the moment that does not move
arount with the mouse-pointer. While on my laptop-screen only I can
change to a different terminal and restart gdm, that will usually "fix"
the problem and I can start a new session.

I'm using the comercial Catalyst 11.5 drivers, older drivers seemed
veeeery slow for some reason, resulting in stuttering and tears..

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https://bugs.launchpad.net/bugs/775060

Title:
  Random GUI "freezes" in Natty (can only move the cursor)

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