Re: Installing Graphics Drivers Help
Unfortunately ATI no longer makes a driver to work with your graphics card. You are using the open source driver, which is the only one you can use.
If you need better 3d acceleration, you could buy a recent Nvidia graphics card (they stay supported for ages) or install Ubuntu 12.04 instead, which has an older version of the ATI driver that works with your graphics card.
DO NOT attempt to install any other graphics driver on Ubuntu.
I hope my advice helps. Please let me know whether it did!