I can confirm this behaviour on my laptop (Asus V6J) running Edgy Eft with latest updates.
Best way to unlock the pointer I've found so far is to find the place it got stuck and click right mouse button there. -- Random synaptics mouse input lockups https://launchpad.net/bugs/62626 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs