I have updated to the patched version of GDM and it fixes the error, but it introduces a new one.
In testing the patch, I noticed that every other time Gnome is restarted, it will hang. The screen turns black and the cursor appears to be loading, but Gnome does not start. After pressing Ctrl-Alt- Backspace again, Gnome will load properly. -- gdm / X server does not restart after Ctrl + Alt + Backspace https://launchpad.net/bugs/34859 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs