I'm running the same mb and gpu (HD 3200). By default, everything works - but I have no hardware video acceleration - the CPU is struggling to keep up when I view HD video (720p usually - haven't tried throwing 1080 at it yet).
So I tried doing the built-in ubuntu method of installing restricted drivers (fglrx). This resulted in the 3cm border around my image, as well as much of the bottom and right of my desktop out of view. I tried running a fix posted by one of the AMD users, but it failed saying I needed to run "aticontrol --initial" first. When I run that, I get the following message:
This is my xorg.conf file which is generated when the fglrx driver is activated using the 'restricted drivers' control panel:
Found fglrx primary device section
Unable to find any supported Screen sections
I'm running video thru the DVI connection, but that just goes to HDMI on the other end. Eventually I'll go HDMI on both ends. Right now I am trying to get VLC to play a video and use the GPU instead of the CPU.
Identifier "Default Screen"
Identifier "Default Device"
Also, I tried playing a video while running fglrx to see if this was a worthy goal. The video was flickering so bad it was unwatchable. Moving the player window left the video behind and it took a while to catch up. This does not look good. However, I'm wondering if one of these fixes for the border issue will also resolve the flicker?