Public bug reported:
There is a very high noise level whenever the audio driver doesn't get
used for a while (after 5-10 seconds). The problem goes away whenever
any sound plays, even a completely silent video. There is a solution
online that sets two values to prevent the audio driver going into power
save state, but the solution isn't permanent and isn't a real solution.
That 'hacky' solution uses the following two commands:
echo 0 | sudo tee /sys/module/snd_hda_intel/parameters/power_save_controller
echo 0 | sudo tee /sys/module/snd_hda_intel/parameters/power_save
Power save sounds like a good feature to have, but there should be an
option to disable it or something when the motherboard/audio card has
high noise levels when it enters power save...
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.8.0-48.54-generic 5.8.18
Uname: Linux 5.8.0-48-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu50.5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: thomas 2761 F.... pulseaudio
/dev/snd/pcmC1D0p: thomas 2761 F...m pulseaudio
/dev/snd/controlC0: thomas 2761 F.... pulseaudio
/dev/snd/timer: thomas 2761 f.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 9 14:34:09 2021
InstallationDate: Installed on 2021-02-09 (58 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Generic successful
Symptom_Card: Starship/Matisse HD Audio Controller - HD-Audio Generic
Symptom_Jack: Green Headphone Out, Front
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: High background noise, or volume is too low
Title: [To Be Filled By O.E.M., Realtek ALC892, Green Headphone Out, Front]
Background noise or low volume
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/18/2020
dmi.bios.release: 5.14
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P4.20
dmi.board.name: B450 Pro4
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.:bvrP4.20:bd06/18/2020:br5.14:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnB450Pro4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.sku: 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 groovy
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https://bugs.launchpad.net/bugs/1923196
Title:
Background noise when intel hd audio enters power save
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