This bug report provides detailed information about an audio issue on
Ubuntu 16.04, including system specifications and relevant diagnostic
data. The inclusion of video and forum posts for further context is
commendable, making it easier for others to understand and assist in
resolving the problem. Also read it
:https://kqsolicitors.com/immigration-attorney/healthcare-
visa/invitation-letter-for-visa-uk/

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https://bugs.launchpad.net/bugs/1577599

Title:
  [CM1855, Realtek ALC892, Green Line Out, Rear] Sound is distorted /
  Audio Notification unstable (Popping in/out)

Status in alsa-driver package in Ubuntu:
  Confirmed

Bug description:
  For a better explanation, here is a video I've made.
  https://youtu.be/8q092XpLT-Y

  For further diagnostics, here is a ubuntu forum post I've made.
  http://ubuntuforums.org/showthread.php?t=2322708

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu5
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC2D0c:   deviantxs   1672 F...m pulseaudio
   /dev/snd/controlC2:  deviantxs   1672 F.... pulseaudio
   /dev/snd/controlC0:  deviantxs   1672 F.... pulseaudio
   /dev/snd/controlC1:  deviantxs   1672 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon May  2 16:35:54 2016
  InstallationDate: Installed on 2016-04-30 (2 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 
(20160420.1)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:SB failed
  Symptom_Card: Built-in Audio - HDA ATI SB
  Symptom_Jack: Green Line Out, Rear
  Symptom_Type: Digital clip or distortion, or "overdriven" sound
  Title: [CM1855, Realtek ALC892, Green Line Out, Rear] Sound is distorted
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/20/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1501
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: CM1855
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1501:bd08/20/2013:svnASUSTeKCOMPUTERINC.:pnCM1855:pvrTobefilledbyO.E.M.:rvnASUSTeKCOMPUTERINC.:rnCM1855:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: CM1855
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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