https://bugs.freedesktop.org/show_bug.cgi?id=65730
--- Comment #2 from Jason jasontheparamedic@hotmail.com --- Indeed I had already tried that in my /etc/default/grub file. I edited both lines and rebooted... GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.audio=1" GRUB_CMDLINE_LINUX="radeon.audio=1"
Sound does not work.