touch-packages team mailing list archive

[Raymond <1252733@xxxxxxxxxxxxxxxxxx>]

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda/patch_realtek.c?id=73bdd597823e2231dc882577dbbaf8df92fe1775

the patch is for dell notebook, it may not work if you are using Asus
notebook

it  depend on how the notebook vendor and codec vendor implement the
combo jack


e.g. 92HD91 datasheet mention that Mic  jack is not supported on the combo jack

2.22.Combo Jack Detection 4 conductor (combo) jacks are becoming
popular. In the most common implementation the 4 conductor plug has the
same mechanical dimensions as a 3 conductor 3.5mm plug but the sleeve
portion has been split into two segments:S1 and S2. When a 4-conductor
plug (headset) is inserted into the jack T (Tip) = Left headphone audio,
R (Ring) = Right headphone audio, S1 (First half of sleeve) = microphone
input, and S2 (Second half of sleeve) = return (GND). When a 3-conductor
plug (headphones) is inserted into the jack; T=Left audio, R=Right
audio, S1=GND, S2=GND. By monitoring the S1 connection to see if it is
shorted to ground, we can distinguish between headsets and headphones.
Please note that analog microphone plugs (3-conductor-Lmic/Rmic/GND) and
optical SPDIF plugs can not be supported using this implementation.

-- 
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/1252733

Title:
  [XPS 12-9Q33, Realtek ALC668, Black Headphone Out, Left] Background
  noise or low volume

Status in “alsa-driver” package in Ubuntu:
  Incomplete

Bug description:
  When listening to sound on my laptop through headphones, there's a
  constant background hiss (which disappears only when all sound has
  been stopped for a few seconds. power saving I guess).

  I also need to turn the volume *way* down to 10% for the sound volume
  to be reasonable (it's way too loud otherwise).

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6
  Uname: Linux 3.11.0-13-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  martijn    2130 F.... pulseaudio
   /dev/snd/pcmC1D0p:   martijn    2130 F...m pulseaudio
   /dev/snd/controlC0:  martijn    2130 F.... pulseaudio
  Date: Tue Nov 19 14:26:46 2013
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2013-11-13 (6 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful
  Symptom_Card: Intern geluid - HDA Intel PCH
  Symptom_Jack: Black Headphone Out, Left
  Symptom_PulsePlaybackTest: PulseAudio playback test successful
  Symptom_Type: High background noise, or volume is too low
  Title: [XPS 12-9Q33, Realtek ALC668, Black Headphone Out, Left] Background noise or low volume
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/24/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A03
  dmi.board.name: XPS 12-9Q33
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A03
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA03:bd09/24/2013:svnDellInc.:pnXPS12-9Q33:pvrA03:rvnDellInc.:rnXPS12-9Q33:rvrA03:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: XPS 12-9Q33
  dmi.product.version: A03
  dmi.sys.vendor: Dell Inc.

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