Install the latest non-free Nvidia drivers on Ubuntu 12.04 LTS.

The Ubuntu-X Swat Team PPA is for stable upstream releases of X.org components. This PPA has been around since 2006.

Step 1 - Add the Ubuntu-X Swat Team stable PPA to your sources.list.
       
        Open a terminal and type:

sudo apt-add-repository ppa:ubuntu-x-swat/x-update

Step 2 - Get the latest list of software from each repo in your sources.list, including the PPA you just added.

        Type this in the terminal:

sudo apt-get update

Step 3 -  Install the latest non-free Nvidia diver.

        Type this in the terminal:

sudo apt-get install nvidia-current

Step 4 - Restart X or reboot PC.




Step 5 - Check Nvidia driver version  number.

        Type this in the terminal:

cat /proc/driver/nvidia/version