The latest driver (6629) appears to be broken. I had the same problems with the same card. If you try the older (6111) driver, it will probably work fine; it did for me.
nvnews.net has had quite a lot of complaints about this driver under its Linux support section, and it seems it's not just the 4000 card either.
Nvidia GeForce MX 4000 problems!!
in Linux Hardware
Posted
The latest driver (6629) appears to be broken. I had the same problems with the same card. If you try the older (6111) driver, it will probably work fine; it did for me.
nvnews.net has had quite a lot of complaints about this driver under its Linux support section, and it seems it's not just the 4000 card either.
Adrian (using Mandrake 9.1)