I have the same problem (also upgraded from 10.04 to 10.10 (both x86_64). gdm opens but fails to login because it restarts the X server.
As a workaround, I disabled gdm by editing etc/init/gdm.conf. At the console, I can login and start the X server with startx. -- gdm broken after update to 10.10 - instant session end - signal 15 - after login https://bugs.launchpad.net/bugs/663135 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
