Hooked up a second screen to the second connector of my nVidia card, set it up with
nvidia-settings and it started showing my background correctly.
The X display works correctly (i.e.
DISPLAY=:0.1 gedit works) and the cursor goes from one screen to the other but I can't grab windows to the second screen and windows on the edge doesn't appear half on one screen and half on the other.
The second monitor doesn't show in the monitor Ubuntu settings dialog.
I used to use the cube Compiz effect, but I am not interested in it anymore.
Tried rebooting. Any help appreciated, thanks very much.