I recently set up an old Dell Latitude C510 laptop using Xubuntu 10.10 for a friend of mine.
Everything was working fine for about a week or so. Now the built-in touchpad seems to be all screwed up. You can minimally use it to move the mouse, but the mouse pointer always ends up dropping down to the bottom of the screen. It is almost impossible to control the mouse to get anything done. The mouse pointer seems to have a mind of its own.
I tried plugging in both a serial mouse & a USB mouse and this continues to happen. This seem to me to point to a software or driver issue. But I don' t understand why it was fine for a full week and now it royally messed up?