Installing proprietary graphics drivers on Ubuntu is not an easy task because if you miss even a single step that single mistake could render all your effort worthless. But there is tool to automate this and its called "Envy". There are two version of envy available.
- Envy Legacy - Envy legacy can be used to install ati & nvidia proprietary drivers on Ubuntu versions gutsy or lower.
- EnvyNG - Allows you to install both ati and nvidia dirvers only on Ubuntu hardy.
With envy legacy you have to take care of little things when upgrading to newer distributions. But with EnvyNG this maintenance is no longer needed. Every thing is automatically taken care when you upgrade your distribution