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] -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1487168/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
