Public bug reported:
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.
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug trusty
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https://bugs.launchpad.net/bugs/1340076
Title:
HDMI audio is severely distorted.
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