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[bitinerant <788317@xxxxxxxxxxxxxxxxxx>]

I have this maybe twice a month since 11.04--black screen with active
mouse pointer.  After typing my password, mouse pointer changes as I
move it to different parts of the screen.  Banshee keyboard shortcuts
work to start/stop music.

I eventually discovered that I could recover without a reboot via ctrl-
alt-F1, log in, type "killall -9 compiz", ctrl-alt-F7, and wait several
seconds.

This is a dual-screen Dell desktop and I never connect or disconnect
screens.

$ lspci |grep -i graph
00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03)

These two pages describe what seems to be the same issue:
  * https://answers.launchpad.net/ubuntu/+source/gnome-screensaver/+question/156524
  * http://askubuntu.com/questions/43502/black-screen-except-for-mouse-cursor-on-thinkpad-edge-15

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which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/788317

Title:
  Xorg freeze, blank screen, mouse moves, VT works

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