Comment 2 for bug 758214

I've got a similar trouble in a particular case:
- wait until the monitor is going to sleep
- move the mouse before gnome-screensaver lock the session
- wait that the monitor display an image
=> See that the image is the same that before the monitor went to sleep. The cursor move but it is a "selection" cursor, whatever the part of the screen it is over
- go to first console, log in
- kill -9 `pidof compiz`
- go to X console
- see the screen (unity and windows) being redrawn
=> The desktop can be use normally

I'm running natty on an Intel graphic card.