That looks like a box of trouble for a HTPC build because of audio & video decode/driver problems..

To get the HDA HDMI audio:
You might get lucky with kernel 3.5 & the open source Radeon driver (using by default)
http://wiki.x.org/wiki/RadeonFeature...Radeon_Drivers

I believe your fusion E-350 CPU is a N.Island r600g.

Just recently it had even looked like AMD had dropped linux support.