Comment 34 for bug 1166765

Thanks!

A couple of the things above were required to get mine working. This is what did it (run from the terminal along side of the broken desktop):

Ctrl>Alt>F1
# Login
export DISPLAY=:0
cd /usr/lib/xorg/modules/extensions/
sudo mv libglx.so libglx.so.xorg
sudo cp libglx.so.340.32 libglx.so
gsettings reset org.compiz.core:/org/compiz/profiles/unity/plugins/core/ active-plugins
sudo reboot