I installed ubuntu on 11.10 and the first thing I did was install gdm. It survived the upgrade to precise but on the upgrade to quantal, it just shows the background and the mouse, then it sticks there, forever. I purged gdm and then reinstalled it, but no avail. Please help!
Edit: I just CANNOT reinstall my system
I tried running gnome-shell --gdm-mode on another display, and the output said something about a typeerror in /usr/share/gnome-shell/js/ui/main.js:74 (at the _sessionUpdate)