On up to date Lucid as of 2010-03-09, this is still a problem with no xorg.conf file (X defaults to XAA).
$ cat /proc/version_signature Ubuntu 2.6.32-16.24-generic -- [XAA] garbled screen with compiz but no KMS on ATI Radeon Mobility 7500 https://bugs.launchpad.net/bugs/513956 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp