the original reporters issue sounds like a duplicate of https://launchpad.net/distros/ubuntu/+source/xserver-xorg-video- ati/+bug/38181 ?
-- system freeze when screensaver is trying to start https://launchpad.net/bugs/45290 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
