Linux Mint 20.1 - no sound over HDMI

[MartinT]

Hello,

Linux Mint 20.1
Kernel 5.4.0-81

Sound is not played via HDMI cable. My gpu is Radeon.
I tried it on windows on the same machine and it is working.
So it is not a hardware issue.

When I open pulse audio I see all HDMI profiles are marked as unplugged/unavailable.

No Idea how to fix this issue.

Thank you for any help

[bc_cable]

Same issue, also with a Radeon HDMI output.

The Audio worked before I upgraded from Mint 20 to 20.1
Although with 20 I needed to configure/activate the driver it every time I rebooted using a command (pactl set-card-profile 0 output:hdmi-stereo) or the PulseAudio tool.

If anyone has details on how to correct this issue it would be appreciated, otherwise I may have to rebuild back to version 20 until a patch/fix is available.

[MartinT]

this command doesn't have any effect for me

[Hatori]

Hi Martin,

I'm not claiming this as a fix but I have linux Mint 20 and a Dell laptop with an external HDMI port. When i plug in a HDMI cable, mint detects that and offers me the option to set which monitor output i'd like. If i set an output that includes the HDMI port i also see there is no HDMI audio output in the audio mixer, so i perform the following terminal command:

"pulseaudio -k" (not including the quotes)

then open the audio mixer which has now restarted. Navigate to the output selection and I then see that the HDMI2 output is now active and available for selection, even at the same time as my laptop analogue audio output (which is defeatable). I have to do this every time i switch between that external HDMI video output and the main laptop screen. If i dont output the video, i cant send the audio out to that HDMI output. I must enable the HDMI video out for this to work, or else i can never get HDMI audio out, regardless of killing pulseaudio.

Try this and see if it works for you?

--edited for typo

[MartinT]

thank you for reply.

I tried it. But unfortunately no effect.
Everything is still unplugged

[frank84]

Hello MartinT,

Since you mentioned that you are also running Windows on the same machine, [if you haven't tried this already]:

You might want to try turning off "Fast Startup" in Windows, followed by a relatively long shutdown (and you may also need to restart the computer a second time) to possibly get sound over HDMI working in LM.

You can find a lot of good tips like this regarding troubleshooting sound issues on this web page which is linked from MrEen's LM Forum profile page.

Good luck getting your sound going!

[MartinT]

Hello,

thanks for hint. But I have windows 7, not 10, and I didn't find there any fast startup possibility.

best regards