Audio Device not recognized. Problem with sound.

[Víctor]

Hi,

after the last Ubuntu updates, I have lost the sound of my screen speakers (yes the monitor has got integrated a speakers), this sound is provided from the GPU via HDMI: [System Product Name, Nvidia GPU 82 HDMI/DP, Digital Out, HDMI]

Sometimes when I reboot the PC, it works and detect the Nvidia GPU 82 HDMI/DP and I can hear the sound of the screen speakers. But a lot of times when I switch on the PC the selected sound card is Digital S/PDIF Family 17h and I can't hear nothing when it happens.

If I try to change the sound card, I can't, it doesn't appear in the sound settings options. If I use Pulse Audio, It doesn't appear in it too.

Please, fix this bug, It is very annoying to turn on the PC and not hear anything.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.8.0-59.66~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-59-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC2: pitx 1733 F.... pulseaudio
 /dev/snd/controlC1: pitx 1733 F.... pulseaudio
 /dev/snd/controlC0: pitx 1733 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed Aug 18 18:46:27 2021
InstallationDate: Installed on 2021-01-14 (215 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:NVidia failed
Symptom_Card: GP102 HDMI Audio Controller - HDA NVidia
Symptom_Jack: Digital Out, HDMI
Symptom_Type: Only some of outputs are working
Title: [System Product Name, Nvidia GPU 82 HDMI/DP, Digital Out, HDMI] Playback problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/04/2020
dmi.bios.release: 5.17
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3001
dmi.board.asset.tag: Default string
dmi.board.name: PRIME X570-PRO
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3001:bd12/04/2020:br5.17:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMEX570-PRO:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

[Víctor (pitx89)]

Extra info attached.

[Víctor (pitx89)]

After last Ubuntu Updates,I can watch now the HDMI/DisplayPort2, but when you go to Ubuntu Settings in Sound options (watch the screenshot attached in this comment), you can watch the HDMI/DisplayPort 2 and the config Salida Digital Estereo (Stereo Digital Output).

If you change the config Stereo to HDMI 7.1 (I only have a stereo Speakers not 7.1 speakers), the config setting disappear in the Ubuntu Settings Menu and you can't select it again and you can't change it (check the screenshot).

If you try to select HDMI/DisplayPort 2 it doesn't work because the 7.1 sound was selected and I have got a stereo speakers.

To fix it I have opened pulse audio (check the other Screenshot attached) and in the top setting, GP102 HDMI Audio set the setting "Stereo Digital Output (HDMI2)".

After that the sound was recovered.

I don't know if the correct detection of the sound cards when switching on the PC was fixed or not. You will check if this part is fixed now with the last Ubuntu Updates.

Thank you.

[Víctor (pitx89)]

Attached another screenshot.

[Víctor (pitx89)]

Attached another screenshot.

[Hui Wang (hui.wang)]

The issue of #3 is a known issue in the pulesaudio.

About the hdmi audio can't be detected, maybe it is the graphic driver's issue, do you install the nvidia-drivers after upgrading?

[Víctor (pitx89)]

Yes, the upgrade updated the Nvidia Driver too.