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[MD4 <bruno.mueller@xxxxxxxxx>]

Hi

I have the same problem but I am using a Lenovo T410, it is using also
the CX20585 chip

For me it fails with Ubuntu 15.04

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https://bugs.launchpad.net/bugs/1414440

Title:
  [SATELLITE L750, Conexant CX20585, Speaker, Internal] speaker fails
  after a while; headphone jack still working

Status in alsa-driver package in Ubuntu:
  Confirmed

Bug description:
  Sound works fine after restart, but then suddenly the speakers go
  silent. The headphone jack is still giving out sound, though. The
  problem never occurred before, I first noticed it only after a recent
  Linux kernel upgrade, so I suspect it may be related.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-44.73-generic 3.13.11-ckt12
  Uname: Linux 3.13.0-44-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  josip      6622 F.... pulseaudio
   /dev/snd/controlC0:  josip      6622 F.... pulseaudio
   /dev/snd/pcmC0D0p:   josip      6622 F...m pulseaudio
  CurrentDesktop: Unity
  Date: Sun Jan 25 14:46:36 2015
  InstallationDate: Installed on 2014-09-27 (119 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_Card: Built-in Audio - HDA Intel PCH
  Symptom_Jack: Speaker, Internal
  Symptom_Type: Sound works for a while, then breaks
  Title: [SATELLITE L750, Conexant CX20585, Speaker, Internal] fails after a while
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/24/2011
  dmi.bios.vendor: INSYDE
  dmi.bios.version: 2.40
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Base Board Product Name
  dmi.board.vendor: Intel Corp.
  dmi.board.version: Base Board Version
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: OEM Chassis Manufacturer
  dmi.chassis.version: OEM Chassis Version
  dmi.modalias: dmi:bvnINSYDE:bvr2.40:bd08/24/2011:svnTOSHIBA:pnSATELLITEL750:pvrPSK30E-040006Y4:rvnIntelCorp.:rnBaseBoardProductName:rvrBaseBoardVersion:cvnOEMChassisManufacturer:ct10:cvrOEMChassisVersion:
  dmi.product.name: SATELLITE L750
  dmi.product.version: PSK30E-040006Y4
  dmi.sys.vendor: TOSHIBA

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