I've installed some new drivers and restarted, and much to my amusement when I log in my screen goes black, then white, and it never draws properly. I switched to the command line using Ctrl + Alt + F1 but I'm not sure how to disable compiz and enable metacity as the default window manager. Using metacity --replace doesn't work since the command line appears to be a separate login instance altogether... Any tips?
EDIT:
I've done this for now:
http://www.ubuntugeek.com/how-to-install-classic-gnome-desktop-in-ubuntu-12-04-precise.html