Yesterday, I started having a problem in my 12.04 installation where my cursor was huge. I tried changing the cursor theme in dconf-editor, but that didn't fix it after a reboot, so I decided to just deal with it for now. Later on, I rebooted the machine again and since then, the cursor has not been appearing on the screen at all, though it does appear to be at the bottom right corner edge, invisible (right clicking brings up a menu there). All mouse buttons work on both my laptop's trackpad and an external mouse, just not actually moving either.
I recently installed the nvidia graphics drivers and the compiz settings manager. Could one of those have caused this?
Any help would be much appreciated!