Is this a regression? I.e., did it work previously on Lucid and only occurred after a recent update? If so, about when did you first notice it?
Also, try seeing if it works if KMS is disabled - see https://wiki.ubuntu.com/X/KernelModeSetting ** Package changed: xserver-xorg-video-ati (Ubuntu) => linux (Ubuntu) ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- Using xrandr with dual monitor causes garbled image https://bugs.launchpad.net/bugs/570123 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