5.1 Sound not working via HDMI and internal GPU

[John Doe]

Hello,

I've tried Ubuntu 22.04 and now 24.04. Unfortunately the 5.1 sound can be chosen, but does not work.

I've also used pavucontrol and tried other solutions to fix it. Issue remains the same. Even the test only gives an audio output for the two audio channels (left/right)

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: alsa-base 1.0.25+dfsg-0ubuntu7
ProcVersionSignature: Ubuntu 6.8.0-45.45-generic 6.8.12
Uname: Linux 6.8.0-45-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/seq: toni 5257 F.... pipewire
 /dev/snd/controlC0: toni 5262 F.... wireplumber
 /dev/snd/controlC1: toni 5262 F.... wireplumber
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
CurrentDmesg: Error: command ['pkexec', 'dmesg'] failed with exit code 126: Error executing command as another user: Request dismissed
Date: Tue Oct 1 08:03:50 2024
InstallationDate: Installed on 2024-09-29 (2 days ago)
InstallationMedia: Ubuntu 24.04.1 LTS "Noble Numbat" - Release amd64 (20240827.1)
MachineType: Gigabyte Technology Co., Ltd. X670E AORUS MASTER
PackageArchitecture: all
ProcEnviron:
 LANG=de_DE.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
SourcePackage: alsa-driver
Symptom: audio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/14/2024
dmi.bios.release: 5.35
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: F32
dmi.board.asset.tag: Default string
dmi.board.name: X670E AORUS MASTER
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrF32:bd08/14/2024:br5.35:svnGigabyteTechnologyCo.,Ltd.:pnX670EAORUSMASTER:pvr-CF:rvnGigabyteTechnologyCo.,Ltd.:rnX670EAORUSMASTER:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:
dmi.product.family: X670 MB
dmi.product.name: X670E AORUS MASTER
dmi.product.sku: Default string
dmi.product.version: -CF
dmi.sys.vendor: Gigabyte Technology Co., Ltd.