I had this same problem but with the nvidia driver and removing xserver- xgl fixed the problem.
-- [fglrx] fglrx+xgl doesn't support xrandr https://bugs.launchpad.net/bugs/164125 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