Public bug reported:

Binary package hint: xorg

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.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xorg 1:7.5+3ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-17.26-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-17-generic i686
Architecture: i386
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
ProcEnviron:
 LANG=en_GB.utf8
 SHELL=/bin/bash
SourcePackage: xorg
dmi.bios.date: 01/09/2007
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 6.00 PG
dmi.board.name: NF-MCP61
dmi.chassis.type: 3
dmi.modalias: 
dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd01/09/2007:svn:pn:pvr:rvn:rnNF-MCP61:rvr:cvn:ct3:cvr:
glxinfo: Error: [Errno 2] No such file or directory
system:
 distro:             Ubuntu
 codename:           lucid
 architecture:       i686
 kernel:             2.6.32-17-generic

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 lucid

-- 
screen flickers/shimmers for half a second from side to side ATI Radeon 2600 HD 
https://bugs.launchpad.net/bugs/550141
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