Using GDM here, too. Tried franceloc's modifiv=cation to the kdmrc, then switched login managers to kdm.
Still got lockups, regardless if using KDE or Gnome. Tried no display manager. Machine booted, got to a tty login prompt, logged in and did a "startx &". Had no "default" desktop set so XFCE booted. Tried to logout, ie, go back to the tty and got the lockup. David -- 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 [email protected] https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
