Forwarding this bug from Ubuntu reporter TommyBoy:
Screen flickers/shimmers for half a second from side to side when using notifications, certain compiz effects, using wine, and general desktop usage. The screen connection also resets or goes black sometimes.
See this video: http://launchpadlibrarian.net/42260836/flicker.avi
This can be reproduced using compiz. Please enable the water effect and put in onto a rain delay of 500 (shift+F9). In about 10 seconds you should see the screen dancing around and flickering. Hard to describe. Can't make screen cast as I also have an xorg slowdown issue.
Compiz is just a method to get this bug to show up again and again. This is also happening when I am using notifications launching wine and other general use of the desktop.
Also I am hearing a clicking sound from the screen and sometimes getting the message that the screen source disappeared and just reconnected also the screen is going blank sometimes.
DistroRelease: Ubuntu 10.04
Package: xorg 1:7.5+3ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-17.26-generic 188.8.131.52+drm33.1
Uname: Linux 2.6.32-17-generic i686
Date: Sun Mar 28 10:30:00 2010
DkmsStatus: Error: [Errno 2] No such file or directory
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta i386 (20100318)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-17-generic root=UUID=84de763d-0e1f-4c77-b91a-e32343dae65e ro quiet splash
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 6.00 PG
glxinfo: Error: [Errno 2] No such file or directory
system: codename: lucid