Ubuntu – find ASROCK E350M1 Integrated AMD Radeon HD 6310 graphics driver

I just built a desktop computer using an ASRock E350M1 board, powered by an AMD Fusion E-350 APU (AMD Radeon HD 6310 GPU Model). I installed Ubuntu 10.04. Did all the updates. Almost everything works great: I can see movies (DVD), surf, etc., but I cannot play games –screen frames are very, very slow. I have not installed any hardware drivers. When I search (in Ubuntu) for the hardware drivers, none are found.

I found here, http://wiki.cchtml.com/index.php/Hardware that the graphics card is officially supported: PALM | Radeon HD 6250/6310

If this is of any help, this is what I entered on the terminal:

lspci -nn | grep VGA

00:01.0 VGA compatible controller [0300]: ATI Technologies Inc Device
[1002:9802]

^C
sudo apt-get install build-essential cdbs fakeroot dh-make debhelper debconf libstdc++6 dkms libqtgui4 wget execstack libelfg0 dh-modaliases   

[sudo] password for pat:
Reading package
lists…
Done Building dependency tree
Reading state
information…
Done debconf is already the newest version. libstdc++6
is already the newest version. libqtgui4 is already the newest
version. libqtgui4 set to manually installed. wget is already the
newest version. E: Couldn't find package dh-modaliases

I do not know what to do from here.

Questions:

• Where can I locate the drivers?
• How do I install the drivers?