[HP Notebook, ATI R6xx HDMI, Digital Out, HDMI] Audio L/R balance problem

[Iacopo Sbalchiero]

Every time the PC turns on, the audio output from HDMI is not well balanced (the left speaker feels very weakened). In the audio settings, as I try to adjust the audio balance, it immediately starts working again as normal. It is not a hardware problem as with Windows 11 OS on the same machine the problem does not arise.

Using Ubuntu 21.04 with Gnome 3.38.5

alsa-base version: 1.0.25+dfsg-0ubuntu7

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: alsa-base 1.0.25+dfsg-0ubuntu7
ProcVersionSignature: Ubuntu 5.11.0-37.41-generic 5.11.22
Uname: Linux 5.11.0-37-generic x86_64
ApportVersion: 2.20.11-0ubuntu65.3
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: iacopo 1598 F.... pulseaudio
 /dev/snd/controlC0: iacopo 1598 F.... pulseaudio
 /dev/snd/pcmC0D3p: iacopo 1598 F...m pulseaudio
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Oct 14 09:35:04 2021
InstallationDate: Installed on 2021-09-16 (27 days ago)
InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Audio interno - HDA ATI HDMI
Symptom_Jack: Digital Out, HDMI
Symptom_PulseAudioLog:
 ott 14 09:26:37 iacopo-HP systemd[970]: pulseaudio.service: Succeeded.
 ott 14 09:26:47 iacopo-HP systemd[970]: pulseaudio.socket: Succeeded.
Symptom_Type: Volume slider, or mixer problems
Title: [HP Notebook, ATI R6xx HDMI, Digital Out, HDMI] volume slider problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/30/2018
dmi.bios.release: 15.33
dmi.bios.vendor: Insyde
dmi.bios.version: F.33
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 81FA
dmi.board.vendor: HP
dmi.board.version: 67.42
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.ec.firmware.release: 67.42
dmi.modalias: dmi:bvnInsyde:bvrF.33:bd07/30/2018:br15.33:efr67.42:svnHP:pnHPNotebook:pvrType1ProductConfigId:skuY6G74EA#ABZ:rvnHP:rn81FA:rvr67.42:cvnHP:ct10:cvrChassisVersion:
dmi.product.family: 103C_5335KV HP Notebook
dmi.product.name: HP Notebook
dmi.product.sku: Y6G74EA#ABZ
dmi.product.version: Type1ProductConfigId
dmi.sys.vendor: HP