LinuxTent

What you have to do if you install the vga driver but it does not work?
Its so simple you have to enable it . To do so, just follow the following,

System->Administration->Hardware Drivers

You might need to restart.

Have Fun

To Install graphics drivers on ubuntu.
You need to install the driver and the configuration tool. To do that, just type the following in a terminal window:
sudo apt-get install "drive-name" " configuration-tool"
You need to change “drive-name” and “configuration-tool” according to what you have.

If you don’t know the name of your graphics card, check it here:
lspci

In my case it was Nvidia so i changed “driver-name” to nvidia-glx and “configuration-tool” to vividia-setting.
For ATI cards , you can use xrog-driver-fglrx and fglrx-control

After installation, you need do some changes on the “xrog.conf” file .Use the following command to open the file:

sudo gedit /etc/x11/xrog.conf

restart your computer
have fun