Public bug reported:
Hello,
my computer is connected to my TV screen with HDMI.
I'm using HDMI displayport audio out in pulseaudio.
I hear crackling and echoing.
If I use this workaround:
echo '# add support for intel audio
options snd-hda-intel vid=8086 pid=8ca0 snoop=0' >>
/etc/modprobe.d/alsa-base.conf
it works but after several minutes I have an important delay between
video and audio.
Thank you for your help.
LGDN.
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.16.0-31.41-generic 3.16.7-ckt5
Uname: Linux 3.16.0-31-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.7-0ubuntu8.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: magneto 1830 F.... pulseaudio
/dev/snd/pcmC1D3p: magneto 1830 F...m pulseaudio
/dev/snd/controlC1: magneto 1830 F.... pulseaudio
/dev/snd/controlC0: magneto 1830 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon Mar 9 12:30:14 2015
InstallationDate: Installed on 2014-06-19 (263 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: Underruns, dropouts, or "crackling" sound
Title: [All Series, ATI R6xx HDMI, Digital Out, HDMI] Underruns, dropouts or
crackling sound
UpgradeStatus: Upgraded to utopic on 2015-03-09 (0 days ago)
dmi.bios.date: 12/13/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1707
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: GRYPHON Z87
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1707:bd12/13/2013:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnGRYPHONZ87:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: All Series
dmi.product.version: System Version
dmi.sys.vendor: ASUS
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug utopic
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https://bugs.launchpad.net/bugs/1429809
Title:
ATI HDMI audio: echoing and crackling sound
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