Command line volume control amixer has problems with muting

Bug #1078233 reported by Honza Javorek
14
This bug affects 3 people
Affects Status Importance Assigned to Milestone
alsa-utils (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

If I turn the volume too low, I cannot take it back. It stays muted and my "volume up" command does nothing.

$ amixer set Master playback 2dB-
Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
  Playback channels: Mono
  Limits: Playback 0 - 64
  Mono: Playback 4 [6%] [-45.00dB] [on]
$ amixer set Master playback 2dB-
Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
  Playback channels: Mono
  Limits: Playback 0 - 64
  Mono: Playback 1 [2%] [-47.25dB] [on]
$ amixer set Master playback 2dB-
Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
  Playback channels: Mono
  Limits: Playback 0 - 64
  Mono: Playback 0 [0%] [-99999.99dB] [on]

And now it is broken. Following does nothing:

$ amixer set Master playback 2dB+
Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
  Playback channels: Mono
  Limits: Playback 0 - 64
  Mono: Playback 0 [0%] [-99999.99dB] [on]

What is expected to happen: The volume raises.
What it does instead: Nothing I could notice.

The value -99999.99dB looks suspicious.

Version of alsa-utils: 1.0.25-1ubuntu5
Ubuntu version: Ubuntu 12.04.1 LTS
Release: 12.04

Note: It comes from this my question on Ubuntu Ask - http://askubuntu.com/q/216588/34304

Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in alsa-utils (Ubuntu):
status: New → Confirmed
Revision history for this message
Clemens Ladisch (clemens-ladisch) wrote :
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