I have the same issue: freezing on an IBM Thinkpad X31 with a ATI Radeon card using the radeon driver. It appears to happen when I use an external monitor.
Alos noticed something that might be of interest. My fileserver has been dead for the last couple of days and I didn't get a single freeze. Then I brought it back up and the damn computer froze immediately. Could this be related to NFS mounted filesystems????? -- [dapper] xrandr freezes the system (radeon, MergedFB) https://launchpad.net/bugs/47775 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
