Comment 67 for bug 1487168

My interpretation of this update is that I believe you are trying to
suggest that I apply this patch to correct a scaling problem with HDA,
Is that what you are trying to communicate?

Also, I understand that this code is or maybe broken but why are we working
on Intel HDA when the default ICH AC97 seems to have the problem. I would
rather work on getting the defaulted Driver correct.

On Sat, Sep 5, 2015 at 10:07 AM, Raymond <email address hidden> wrote:

>
> https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda/patch_sigmatel.c?id=7c7767ebe2fa847c91a0dd5551ca422aba359473
>
>
> ALSA: hda - Halve too large volume scales for STAC/IDT codecs
> STAC/IDT codecs have often too large volume scales such as -96dB,
> and exposing this as is results in too large scale in percentage
> representation.
>
> This patch adds the check of the volume scale and halves the
> volume range if it's too large automatically.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1487168
>
> Title:
> [Emulated AD1980 AC97 inside Virualbox 5.0, playback] volume slider
> problem
>
> Status in Virtualbox:
> New
> Status in alsa-driver package in Ubuntu:
> Incomplete
> 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
>
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>