When I use my computer my mouse locks up for a split second whenever I press a new key.

So if I press F5 the mouse will not be able to move for about 1ms. This hasn't been an issue until I tried playing Savage. I could move around but my mouse would freeze up for a second.

This happens on any key press. My computer specs are

HP Elitebook 8530w
NVidia Quadro FX 770m
Ubuntu 9.10(64bit)

The issue is nerve racking as all searches only bring up freezing on standby. I've got no issues otherwise.