Public bug reported:
Frequently, I suffer from pops when playing audio over HDMI to my home
cinema receiver. Stereo or 5.1 output doesn't matter, the pops happen
regardless. The pops can go from a small one every few seconds, to
constant loud pops. At times, all sound can also become muffled and have
an unpleasant static tone. It's horrible, worse than the worst popping.
Other times sound can be fine, sometimes for hours, but the pops always
come back. I'm not experiencing any pops when switching to line out,
although my testing here is limited.
The problem started months ago, either in 18.10 or 18.04, and my
impression is that it's even worse in 19.04. Certainly, the complete
staticy mangling of all sound that occasionally happens is new. When the
sound starts acting up, it can fixed sometimes partially, sometimes in
whole, by switching between outputs and output configurations, and then
switching back. It is also my impression that using multiple programs
that play sound at the same time will have a high risk of triggering,
and worsening, the problem.
I don't think it's my home cinema receiver, as it works as it should
with my several video game consoles. It was also flawless in Ubuntu 6
months ago. It's not my GPU or its drivers, as I have had the same
problem with both Nvidia and AMD.
ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
Uname: Linux 5.0.0-13-generic x86_64
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: mattias 13111 F.... pulseaudio
/dev/snd/controlC1: mattias 13111 F.... pulseaudio
/dev/snd/pcmC1D7p: mattias 13111 F...m pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Tue Apr 30 10:50:11 2019
InstallationDate: Installed on 2019-04-26 (3 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
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: [Z97X-UD3H, ATI R6xx HDMI, Digital Out, HDMI] Sound is distorted
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/25/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F4
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: Z97X-UD3H-CF
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrF4:bd04/25/2014:svnGigabyteTechnologyCo.,Ltd.:pnZ97X-UD3H:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ97X-UD3H-CF:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: Z97X-UD3H
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug disco
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https://bugs.launchpad.net/bugs/1827020
Title:
[Z97X-UD3H, ATI R6xx HDMI, Digital Out, HDMI] Sound quality over HDMI
very poor at times.
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