I have a workstation with NVIDIA GeForce GT 210 graphics card & Ubuntu 10.4, and am having rather annoying problems trying to get them working together. (On other machines and earlier Ubuntu versions I've been a pretty happy NVIDIA user though.)
First of all, simply using the NVIDIA driver automatically suggested by "Adminstration -> Hardware drivers" didn't work at all. Based on this answer, I tried with drivers straight from NVIDIA, and got it working for a while. But now (perhaps due to reboot, or
apt-get upgrade) I'm out of luck again.
There now seems to be a conflict with the Nouveau driver. I've tried removing it:
apt-get --purge remove xserver-xorg-video-nouveau(as suggested here) and reboot
I've also tried
modprobe -r nouveaubut it gives
FATAL: Module nouveau is in use.
But when trying to (re-)execute NVidia's installer (NVIDIA-Linux-x86_64-256.53.run) it keeps complaining about Nouveau. I'm starting to run out of ideas, so any help would be welcome!