Graphic card driver - Acer 3630

[Jackbob]

I got this error trying to start a game:

================================================== ===================================
Usually the cause of this error is that there are no Free Software drivers for your graphics card, please contact your graphics card manufacturer and kindly ask them to provide Free Software support for your card.
================================================== ===================================

I've a laptop acer 3630, i've searched anywhere in the web, but i can't find any solution to install the correct driver.
Any help would be appreciated