[Pkg-alsa-devel] Bug#918792: /usr/bin/amixer: amixer cannot set pulseaudiio volume

[Michal Suchanek]

Package: alsa-utils
Version: 1.1.3-1
Severity: normal
File: /usr/bin/amixer

Hello,

the amixer documentation is spotty at best so I cannot tell if this is
supposed to work or how. Anyway, using amixer on hardware card works, on
pulseaudio it fails without any explanation whatsoever. Alsamixer works
on either:

~ $ amixer
Simple mixer control 'Master',0
  Capabilities: pvolume pswitch pswitch-joined
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 65536
  Mono:
  Front Left: Playback 0 [0%] [on]
  Front Right: Playback 0 [0%] [on]
Simple mixer control 'Capture',0
  Capabilities: cvolume cswitch cswitch-joined
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 65536
  Front Left: Capture 65536 [100%] [on]
  Front Right: Capture 65536 [100%] [on]
~ $ amixer -c 0 sset Master playback 1dB-
Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 39
  Mono: Playback 25 [64%] [-21.00dB] [on]
~ $ amixer -c 0 sset Master playback 1dB+
Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 39
  Mono: Playback 26 [67%] [-19.50dB] [on]
~ $ amixer sset Master playback 1dB-
amixer: Invalid command!


-- System Information:
Debian Release: 9.6
  APT prefers stable
  APT policy: (900, 'stable'), (505, 'oldstable'), (500, 'oldoldstable'), (500, 'testing'), (171, 'unstable'), (151, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386, armhf

Kernel: Linux 4.19.0-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages alsa-utils depends on:
ii  dialog            1.3-20160828-2
ii  kmod              23-2
ii  libasound2        1.1.3-5
ii  libc6             2.28-2
ii  libfftw3-single3  3.3.5-3
ii  libncursesw5      6.0+20161126-1+deb9u2
ii  libsamplerate0    0.1.8-8+b2
ii  libtinfo5         6.0+20161126-1+deb9u2
ii  lsb-base          9.20161125
ii  whiptail          0.52.19-1+b1

alsa-utils recommends no packages.

alsa-utils suggests no packages.

-- no debconf information