https://bugs.freedesktop.org/show_bug.cgi?id=67550
--- Comment #6 from Christian König deathsimple@vodafone.de --- (In reply to comment #5)
Another workaround would be HDMI multichannel audio for radeon :) Does AMD have any plans to implement that?
Oh yes we are working on that and IIRC actually have most of the stuff on the video driver side done, but the alsa side is still missing.
Going to ask on our team call today what the status of that is.