I installed Ubuntu 12.10 on my old laptop. I downloaded new nVidia drivers that released yesterday (my Vcard is 7000M) and installed it as described here . After rebooting, I see for 1 second login promt and then black screen with cursor, but I can't type anything. I removed nvidia drivers in safemode, but problem doesn't solved. What to do?
Try this, it worked for me (problem with lightdm)
ctrl+alt+f1. Login and do a restart lightdm
then i could log in to desktop and do : gedit /etc/rc.local
before the "exit 0" line insert this line: service restart lightdm
It worked for me, and i hope it'll work for you