Mouse pointer (touchpad) getting stuck often in 12.04 [closed]
I had a similar problem, I can still scroll and click, but the cursor is stuck in one place on the screen. Dropping down to a lower run level (CTRL+ALT+F2) and back (CTRL+ALT+F7) seems given me control of my mouse again.
Thank you for reporting this as a bug.
This has been reported as a bug. https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/991707