Adding "radeon.audio=1" to grub config does enable the open source Radeon video video card HDMI audio driver. Mysteriously, this does distort my 1280X720 and other resolutions somewhat, though--taskbar and some icons prove barely visible now. (I'm thinking that adjusting the TV directly improves that.)
I had a great deal of difficulty in getting my search query accurate in the correct manner finally to get to these posts.
Kubuntu 13.10 AMD64 Visiontek Radeon 5450, BIOS dual-core-enabled Sargas AM3.
Adding "radeon.audio=1" to grub config does enable the open source Radeon video video card HDMI audio driver. Mysteriously, this does distort my 1280X720 and other resolutions somewhat, though--taskbar and some icons prove barely visible now. (I'm thinking that adjusting the TV directly improves that.)
I had a great deal of difficulty in getting my search query accurate in the correct manner finally to get to these posts.