I’m on Freya with all the latest updates. I’d like to use 5.1 surround sound output via HDMI, but the sound settings only offer me stereo output via HDMI. I tested Xubuntu 15.04 (Vivid), booted from a thumb drive, which gave me surround options via HDMI out of the box.
Is there any way to get whatever is needed from a ppa or other source? Or do I have to migrate that machine to Vivid?