Mate 20.04 cannot change the audio output

Support & Help Requests Raspberry Pi
#1

As written in official page, I tried to set the audio output to HDMI by
sudo amixer cset numid=3 2
however, terminal return the error as followings.
amixer: Cannot find the given element from control default

When booting the Mate 20.04, I must open System Settings/Sound for manual settings every time.

Does anyone know the solution this?
Thanks in Advance

#2

temp solution:
open system settings/sound
=> in hardware tab: put 1st built in audio off

to test:
reboot and do speaker-test to test if ok

1 Like
#3

Thank you for the response.
Yes, I always 1st audio off by manually then switch the device in output tab.
Trouble is that hardware tab and output tab's changes are not saved.

#4

on my site it's working
my hardware RPi4 4Gb
OS Linux Ubuntu Mate 5.4.0-1015-raspi 64 bit
updated + upgraded

normal situaties in soud settings:

  • Hardware tab:
    • Built-in Audio Stereo Output: 1 Output/ 1 Input Stereo Output (this is the headphone jack)
    • Built-in Audio Stereo Output: 1 Output/1 Input (this is the HDMI)
  • Output tab:
    • Builtin Audio Stereo Connector Headphones (this is the headphone jack)
    • Built Audio Stereo Connector Analog Output (this is the HDMI)

by default on startup sound goes to headphone jack. You can manual switch to HDMI if you select 2d Built-in Audio Stereo
and it works but after reboot sound is again redirected to headphone jack

The only temp solution i find was:
Hardware tab:
1st Built-in Audio => in Profile choice Off
2d is still there (= HDMI)

Result:
Output tab:

  • 1ste Buil-in Audio (headphone jack) is no more in the list
  • only Built-in Audio Stereo Connector Analog Output is still there

Result : only HDMI is active

To test:
Reboot
only HDMI is active and still working

Till now this was the only solution i find/working

#5

Thank you for the reply.
It's works!
I think the solution you found is the correct deal. (correct way for profile settings)

Thank you again for sharing useful information.

#6

good to see that it's working on your site to

#7

Sorry for being a newbie:

I need to change the Output Tab at each login in order to get HDMI to work.

I CANNOT change the Hardware Tab first entry to OFF, clicking in has no response (screendump2).

My login is already a member of audio in /etc/group

Please help

Screenshot at 2020-10-31 16-01-37
Screenshot at 2020-10-31 16-01-37522×520 44.7 KB

#8

When the first audio device is selected, can you click the Stereo Output next to where it says Profile and then select Off?

#9

Yes, that works.

Sorry for my ignorance in using the interface and thanks so much for your speedy and accurate reply.

#10

BTW, what is the linux command execute in the background when I do this in the interface

#11

Please check the youtube video below for solution explaining.


HDMI issue is started 5min 45s.
1 Like
#12

This video appears to answer the question. If you don't speak Chinese (ni hao) there are subtitles. If you don't like subtitles, here's a graphical explanation:

Audio_Configuration_in_Mate

You turn off the profile that goes to the headphones.