I've messed up my ubuntu 13.04.
I've installed nvidia drivers with this commands (found on a STEAM guide):
apt-get install nvidia-experimental-310
apt-get install libgl1-mesa-glx:i386
But now unity does not load. After login I only get the wallpaper, nothing more.
I already purged this packages and tried to reinstall ubuntu-desktop but I still get the same problem.