i'm currently running gusty gibbon on my dell with the newest nividia restricted drivers. Lately my mouse will freeze in position. Either a few seconds after log in or a few hours. the keyboard still works fine and I can shortcut through linux. Also when I load a new program the mouse cursor changes to the "working" but i am still unable to move it. I've tired restarting Xorg (ctrl + alt + backspace) but that just stops at my wallpaper and nothing else.

thanks in advance