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[Raymond <1445596@xxxxxxxxxxxxxxxxxx>]

you have to follow up with the alsa developer as he require event trace
log

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https://bugs.launchpad.net/bugs/1445596

Title:
  lenovo t410 [2537BF9, Conexant CX20585, Speaker, Internal] fails after
  a while

Status in alsa-driver package in Ubuntu:
  Incomplete

Bug description:
  after a suspend the sound works for a while and then stops again

  Sound used to work with Ubuntu 12.04, but after an update it showed
  the same symptoms.

  So I tried the latest Ubuntu version but still same problem.

  Headphones always woirk

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.19.0-14.14-generic 3.19.3
  Uname: Linux 3.19.0-14-generic x86_64
  ApportVersion: 2.17.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D0p:   bruno      1215 F...m pulseaudio
   /dev/snd/controlC0:  bruno      1215 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Apr 17 19:51:41 2015
  InstallationDate: Installed on 2015-03-29 (19 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_Card: Built-in Audio - HDA Intel MID
  Symptom_Jack: Speaker, Internal
  Symptom_Type: Sound works for a while, then breaks
  Title: [2537BF9, Conexant CX20585, Speaker, Internal] fails after a while
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/14/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6IET85WW (1.45 )
  dmi.board.name: 2537BF9
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: 2537R8M1NHK
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr6IET85WW(1.45):bd02/14/2013:svnLENOVO:pn2537BF9:pvrThinkPadT410:rvnLENOVO:rn2537BF9:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2537BF9
  dmi.product.version: ThinkPad T410
  dmi.sys.vendor: LENOVO

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