I started experiencing this today after applying the latest xserver updates for Karmic (1:7.4+3ubuntu10). If you cancel out of the low graphic mode dialog quickly enough, kdm will restart and run normally.
The problem results in the following messages in the kdm.log file: Fatal server error: Server is already active for display 0 If this server is no longer running, remove /tmp/.X0-lock and start again. Please consult the The X.Org Foundation support at http://wiki.x.org for help. ddxSigGiveUp: Closing log Warning: Failsafe mode was already attempted within 30 seconds. Warning: Falling back to gdm to report the issue. -- Karmic + KDM + NVidia = Can't boot (low graphic mode) https://bugs.launchpad.net/bugs/485651 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs