I did a fresh install of Ubuntu 13.04 (Raring ringtail), and expected to reproduce the same multimedia setup as with Windows: I send the sound via HDMI to my AV amplifier.
However, neither the open source drivers provided by Ubuntu nor the proprietary ones downloaded on amd.com enable me to select a surround output. Only stereo is available with the HDMI ouput in the sound configuration.
Did anyone find a trick?
Thanks in advance.