The other day, I ran an update on my Maverick box that wiped out my video settings. Nvidia released a nice new driver for GeForce 6000+ but I’m using a GeForce 5 series card so I think the upgrade probably replaced my video settings with the nice new ones.
There are a lot of unresolved forum posts about this … if you’re using an older video card, you just need to uninstall the new Nvidia drivers and re-install the legacy drivers:
apt-get remove --purge nvidia-current apt-get install nvidia-173