Public bug reported:
On upgrading from Ubuntu 18LTS to 20.04LTS I find that if I stop
playing sound 5 seconds after stopping any correctly playing sounds
(video / music / radio / system ) a loud hum starts in both speakers.
This is volume independent. Before the speakers would just turn off
automatically and go into standby mode.
expected action........... stop playing a sound and speakers go
silent
current action .......... stop playing a sound and 5 seconds later
speakers go from silent to a loud volume independent hum
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: adrian 2706 F.... pulseaudio
/dev/snd/pcmC0D0p: adrian 2706 F...m pulseaudio
/dev/snd/controlC1: adrian 2706 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed Apr 29 10:13:38 2020
InstallationDate: Installed on 2018-05-20 (709 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful
Symptom_Card: Sound Core3D [Sound Blaster Recon3D / Z-Series] (SB1570 SB Audigy
Fx) - HDA Creative
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: None of the above
Title: [HDA-Intel - HDA Intel PCH, playback] Playback problem
UpgradeStatus: Upgraded to focal on 2020-04-24 (5 days ago)
dmi.bios.date: 11/07/2017
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F23
dmi.board.asset.tag: Default string
dmi.board.name: H110M-S2H-CF
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: 7438200-003
dmi.chassis.type: 3
dmi.chassis.vendor: NOVATECH LTD
dmi.chassis.version: V1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrF23:bd11/07/2017:svnNOVATECHLTD:pnMBB-71004:pvrV1.0:rvnGigabyteTechnologyCo.,Ltd.:rnH110M-S2H-CF:rvrx.x:cvnNOVATECHLTD:ct3:cvrV1.0:
dmi.product.family: AMI PLATFORM
dmi.product.name: MBB-71004
dmi.product.sku: MBB-71004
dmi.product.version: V1.0
dmi.sys.vendor: NOVATECH LTD
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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https://bugs.launchpad.net/bugs/1875828
Title:
[HDA-Intel - HDA Intel PCH, playback] Hum problem
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