I've installed Ubuntu 21.04. I've followed a few AskUbuntu guides to no avail. My monitor is connected with an HDMI via an AMD RX 580 (Ellesmere) video card.
I do not have any proprietary drivers installed. As it so happens, official amdgpu-install drivers or amdgpu-pro drivers aren't supported in 21.04. In Ubuntu Software as well I see no drivers for my video card.
lspci Displays two audio devices:
- Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590]
- Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) HD Audio Controller
In Settings > Sound > Output Device, there's only S/PDIF - Family 17h.
pulseaudio -k and rebooting.
I've installed Pulse Audio Volume Control (
pavucontrol). Pulse Audio > Configuration > Ellesmere HDMI Audio > Profile displays a list of 18 digital stereo and digital surround HDMI outputs. ALL of these profits have (unplugged) (unavailable) in the end, and none of them are able to bring out any audio.
Below is my
alsamixer screenshot which I don't understand - is something muted here? I cannot change the values of the "00" either by + or by the up arrow.