[HP EliteBook 8730w, Analog Devices AD1984A, Grey Headphone Out, Front] fails after a while

[Antonio Mihovilovic]

When playing videos or audio in Totem sound is stuttering or repeting itself like a broken vinyl record. This happens even if Totem is minimized.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
Uname: Linux 3.13.0-30-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: anmihovil 1850 F.... pulseaudio
 /dev/snd/pcmC0D0p: anmihovil 1850 F...m pulseaudio
CurrentDesktop: Unity
Date: Fri Jun 27 23:02:49 2014
InstallationDate: Installed on 2014-06-10 (17 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Built-in Audio - HDA Intel
Symptom_Jack: Grey Headphone Out, Front
Symptom_Type: Sound works for a while, then breaks
Title: [HP EliteBook 8730w, Analog Devices AD1984A, Grey Headphone Out, Front] fails after a while
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/26/2008
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68PAD Ver. F.08
dmi.board.name: 30EC
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 91.1E
dmi.chassis.asset.tag: CNU90358BB
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68PADVer.F.08:bd09/26/2008:svnHewlett-Packard:pnHPEliteBook8730w:pvrF.08:rvnHewlett-Packard:rn30EC:rvrKBCVersion91.1E:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 8730w
dmi.product.version: F.08
dmi.sys.vendor: Hewlett-Packard

[Raymond (superquad-vortex2)]

it seem that the driver does not follow the usage of dac_0 and dad_1 in ad1984a datasheet ,
dac_0 is used by headphone and dac_1 is used by portD

analog mixer select signal from dac_0 node 0x03

this mean pulseaudio can only mute speaker playback switch but cannot turn off speaker playback volume

Node 0x20 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
  Control: name="Internal Mic Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=1, ofs=0
  Control: name="Internal Mic Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=1, ofs=0
  Control: name="Front Mic Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=0, ofs=0
  Control: name="Front Mic Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=0, ofs=0
  Control: name="Line Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=4, ofs=0
  Control: name="Line Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=4, ofs=0
  Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
  Amp-In vals: [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x17 0x17] [0x80 0x80]
  Connection: 7
     0x14 0x15 0x16 0x1a 0x25 0x03 0x04

[Launchpad Janitor (janitor)]

[Expired for alsa-driver (Ubuntu) because there has been no activity for 60 days.]