Nvidia drivers for Ubuntu 11.10 Oneiric

You can update your drivers with x-swat ppa and to install Nvidia card latest drivers use this ppa.

To install/Update Nvidia card drivers open Terminal (Press Alt+F2 and type: gnome-terminal) and copy the following commands in the terminal:

sudo apt-add-repository ppa:ubuntu-x-swat/x-updates
sudo apt-get update
sudo apt-get install nvidia-current

When installation complete restart your PC. Now to check the installation is successful Press Window/Super key and type: nvidia x server settings and open it.

That's it Enjoy.

http://www.noobslab.com/2011/09/nvidia-drivers-for-ubuntu-1110-oneiric.html