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 Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs