Comment 25 for bug 827393

als4000 does not provide dB info

you need to fix the alsa-driver before it can be used by PA

This mean that PA server does not really check the existence of dB info in those volume controls

Simple mixer control 'Master',0
  Capabilities: pvolume penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 0 [0%]
  Front Right: Playback 0 [0%]
Simple mixer control 'Master Mono',0
  Capabilities: pswitch pswitch-joined cenum
  Items: 'L chan only' 'R chan only' 'L ch/2 + R ch/2'
  Item0: 'L chan only'