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[Bug 1417789] Re: [W740SU, VIA VT1802, Mic, Internal] mostly no sound at al

 

try record stereo instead of mono using audacity and check whether left
and right channel out of phase,

try mute one channel using alsa mixer or hda analyzer

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https://bugs.launchpad.net/bugs/1417789

Title:
  [W740SU, VIA VT1802, Mic, Internal] mostly no sound at al

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  Mostly I get no sound at all when using the internal mic.
  Using sound setting recording level slider I am able to get some (noisy sound).
  With alsamixer I can get (also noisy) recordings by lowering "Internal Mic Boost"

  I have applied (and removed) 
    oem-audio-hda-daily-dkms_0.201502011331~ubuntu14.10.1_all.deb
    options snd-hda-intel position_fix=1
    options snd-hda-intel position_fix=2

  to no avail

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.16.0-29.39-generic 3.16.7-ckt2
  Uname: Linux 3.16.0-29-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC1D0c:   kaa        2423 F...m pulseaudio
   /dev/snd/controlC1:  kaa        2423 F.... pulseaudio
   /dev/snd/controlC0:  kaa        2423 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Feb  3 23:05:33 2015
  InstallationDate: Installed on 2014-02-25 (342 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_Card: Built-in Audio - HDA Intel PCH
  Symptom_Jack: Mic, Internal
  Symptom_Type: Sound works for a while, then breaks
  Title: [W740SU, VIA VT1802, Mic, Internal] fails after a while
  UpgradeStatus: Upgraded to utopic on 2014-12-05 (60 days ago)
  dmi.bios.date: 10/02/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 4.6.5
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: W740SU
  dmi.board.vendor: Notebook
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: Notebook
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd10/02/2013:svnNotebook:pnW740SU:pvrNotApplicable:rvnNotebook:rnW740SU:rvrNotApplicable:cvnNotebook:ct9:cvrN/A:
  dmi.product.name: W740SU
  dmi.product.version: Not Applicable
  dmi.sys.vendor: Notebook
  mtime.conffile..etc.modprobe.d.alsa.base.conf: 2015-02-03T22:20:52.949815

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