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[Raymond <1487168@xxxxxxxxxxxxxxxxxx>]

if you compare the amixer output of real ad1980 and emulated ad1980

the emulated ad1980 did not implement Master Playback Volume


Card hw:2 'ICH6'/'Intel ICH6 with AD1980 at irq 23'
   Mixer name : 'Analog Devices AD1980'
   Components : 'AC97a:41445370'
   Controls : 40
   Simple ctrls : 29
 Simple mixer control 'Master',0
   Capabilities: pvolume pswitch penum
   Playback channels: Front Left - Front Right
   Limits: Playback 0 - 31
   Mono:
   Front Left: Playback 27 [87%] [-6.00dB] [on]
   Front Right: Playback 27 [87%] [-6.00dB] [on]
Simple mixer control 'Master Mono',0
   Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
   Playback channels: Mono
   Limits: Playback 0 - 31
   Mono: Playback 23 [74%] [-12.00dB] [on]


Card hw:0 'I82801AAICH'/'Intel 82801AA-ICH with AD1980 at irq 21'
  Mixer name	: 'Analog Devices AD1980'
  Components	: 'AC97a:41445370'
  Controls      : 46
  Simple ctrls  : 32
Simple mixer control 'Master Mono',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 63
  Mono:
  Front Left: Playback 0 [0%] [-94.50dB] [off]
  Front Right: Playback 0 [0%] [-94.50dB] [off]

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https://bugs.launchpad.net/bugs/1487168

Title:
  [Emulated AD1980 AC97 inside Virualbox 5.0, playback] volume slider
  problem

Status in alsa-driver package in Ubuntu:
  Incomplete

Bug description:
  Volume Slider is only controlling PCM channel and is not controlling
  Master. In effect, Master is restricting the audio level to the
  default of approximately 45 Percent. In order to raise the Master
  Volume Level, alsamixer is capable of changing Master. Without
  manually raising Master to Max Volume, Volume Slider can only control
  volume from 0-45% which is the default level of Master.

  Description:	Ubuntu Wily Werewolf (development branch)
  Release:	15.10

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: alsa-base 1.0.25+dfsg-0ubuntu5
  ProcVersionSignature: Ubuntu 4.1.0-3.3-generic 4.1.3
  Uname: Linux 4.1.0-3-generic x86_64
  ApportVersion: 2.18-0ubuntu7
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  gene       1330 F.... pulseaudio
                        gene       1922 F.... alsamixer
  CurrentDesktop: Unity
  Date: Thu Aug 20 13:00:57 2015
  InstallationDate: Installed on 2015-08-19 (1 days ago)
  InstallationMedia: Edubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150819)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_Card: Built-in Audio - Intel 82801AA-ICH
  Symptom_Type: Volume slider, or mixer problems
  Title: [ICH - Intel 82801AA-ICH, playback] volume slider problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/01/2006
  dmi.bios.vendor: innotek GmbH
  dmi.bios.version: VirtualBox
  dmi.board.name: VirtualBox
  dmi.board.vendor: Oracle Corporation
  dmi.board.version: 1.2
  dmi.chassis.type: 1
  dmi.chassis.vendor: Oracle Corporation
  dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
  dmi.product.name: VirtualBox
  dmi.product.version: 1.2
  dmi.sys.vendor: innotek GmbH

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