Raspbian: "amixer: Unable to find simple control 'Master',0"

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Raspbian: "amixer: Unable to find simple control 'Master',0"

Postby peter_b » Sat Feb 23, 2019 3:11 am

[PROBLEM]
On Raspbian Stretch, I'm trying to adjust the volume on the shell/commandline, using "amixer", but get the error message:
amixer: Unable to find simple control 'Master',0


[SOLUTION]
Thanks to post on github by user R00t8ug:

okie, for raspberry pi user douban.py inside find "Master" > "PCM" fix the bug.


Works. :D

Properly returns:
Code: Select all
Simple mixer control 'PCM',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback -10239 - 400
  Mono: Playback -2790 [70%] [-27.90dB] [on]
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