** Tags added: xenial

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1340076

Title:
  HDMI audio is severely distorted.

Status in alsa-driver package in Ubuntu:
  Confirmed

Bug description:
  I have recently installed Ubuntu onto a newly built computer with an
  ASRock H87 Performance Motherboard. I am using a TV monitor for a
  screen, connected with HDMI. The visuals work fine but the audio is
  severely distorted and echoes.

  When testing the sound in the hardware settings, it sounds like
  "FRONTFRONTFRONTFRONT" with static or overdrive getting more and more
  prominent as the sound goes on. I have changed the Alsamixer levels
  but found no change. The built-in sound card also shows up when i look
  for it as per the Sound Troubleshooting page.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-30.55-generic 3.13.11.2
  Uname: Linux 3.13.0-30-generic x86_64
  NonfreeKernelModules: snd_hda_codec_generic snd_hda_controller fglrx
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  luke       2371 F.... pulseaudio
   /dev/snd/controlC1:  luke       2371 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu Jul 10 17:52:52 2014
  InstallationDate: Installed on 2014-07-09 (1 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Generic failed
  Symptom_Card: HD-Audio Generic - HD-Audio Generic
  Symptom_Jack: Digital Out, HDMI
  Symptom_Type: Digital clip or distortion, or "overdriven" sound
  Title: [To Be Filled By O.E.M., ATI R6xx HDMI, Digital Out, HDMI] Sound is 
distorted
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/06/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P2.10
  dmi.board.name: H87 Performance
  dmi.board.vendor: ASRock
  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.:bvrP2.10:bd05/06/2014:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnH87Performance:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.

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