HOWTO : CUDA on Ubuntu Desktop 12.04 LTS

When install Ubuntu Desktop 12.04 LTS, select "nomodeset" by pressing F6 on the purple screen with boot up menu. The boot up menu can be reached by pressing "Enter" or "Spacebar" when seeing a keybroad and a human figure on the bottom of the screen during the boot up.

After the installation, the nvidia display driver is installed automatically.

Step 1 :

sudo add-apt-repository ppa:ginggs/backports
sudo apt-get update
sudo apt-get install nvidia-cuda-toolkit