I just built a HTPC using an APU A4 5300 on a MSI FM@-A55M-E33 motherboard. I installed 12.10 and connected it through my TV. Video is fine but there is no sound. I checked the sound settings and there is no option for HDMI. I am using the recommended x-org driver. I tried fglrx and did a reboot but lost my desktop. I purged the fglrx driver and did a reboot and my desktop was restored. How can I get sound over HDMI?