I have a similar behaviour... it's intermittent, but sometimes when KDM ought to restart, the machine locks up instead.
Since X is restarting (X *is* restarting, right?), I really think it's fglrx. If there is a way for me to prove it, though, I'd be pleased to do so. I just don't know how to debug video drivers. -- kubuntu dapper, logoff failure. https://launchpad.net/bugs/50767 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
