” Mono Volume Register (Index 06h) Reg No.Name D15D14D13D12D11D10D9D8D7D6D5*D4D3D2D1D0 Default 06h Mono Volume MVM X X X X X X X X X MV5 MV4 MV3 MV2 MV1 MV0 8000h
*Refer to Table II for examples. This register controls the Mono output volume and mute bit. The volume register contains five bits, generating 32 volume levels with 31 steps of 1.5 dB each. Because AC ’97 defines 6-bit volume registers, to maintain compatibility, whenever the D5 bit is set to “1,” their respective lower five volume bits are automatically set to “1” by the codec logic. On readback, all lower five bits will read “1s” whenever this bit is set to “1.” All registers not shown and bits containing an X are assumed to be reserved. MV[5:0] Mono Volume Control. The least significant bit represents 1.5 dB. This register controls the output from 0 dB to a maximum attenuation of 46.5 dB. MVM Mono Volume Mute. When this bit is set to “1,” the channel is muted. ** Changed in: virtualbox (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Desktop 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: Invalid Status in virtualbox package in Ubuntu: Confirmed 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/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp