amixer: Unable to find simple control 'Master' on Raspbian 12 lite when running from systemctl service

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                          On my Raspbian 12 Lite box I can run:

    amixer set Master 100%

to successfully change the master volume. But if I put it into a systemctl configuration in order to set volume at boot:

      [Unit]
      Description=Volume

      [Service]
      ExecStart=/usr/bin/amixer set Master 100%
      Restart=no
      User=fritz

      [Install]
      WantedBy=multi-user.target

it doesn't work, as journalctl gives:

    Mar 28 23:02:56 raspberrypi amixer: amixer: Unable to find simple control 'Master',0
    Mar 28 23:02:56 raspberrypi systemd: volume.service: Main process exited, code=exited, status=1/FAILURE
    Mar 28 23:02:56 raspberrypi systemd: volume.service: Failed with result 'exit-code'.

As you can see, I specified the same user that I tried from terminal. Adding Group=audio doesn't fix the problem.
                        

Asked by Fabrizio Giudici (141 rep)

Mar 28, 2024, 10:17 PM
Last activity: Mar 28, 2024, 10:28 PM

amixer: Unable to find simple control 'Master' on Raspbian 12 lite when running from systemctl service

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