I find a method to solve the problem change the option in /etc/gdm/gdm.conf to AlwaysRestartServer=true
and all will work fine.(at least in last 3 day. 7+ times log out) ps: My video card is mobility 9700 I use fglrx 8.25.18 with ubuntu dapper RC. -- Lockup problems with both the free xorg ATI driver and the proprietary fglrx driver, using various ATI cards https://launchpad.net/bugs/30447 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
