Public bug reported:

Speakers dont work, although headphones do work. Using Ubuntu 20.04.1 LTS
Release:        20.04
Package version 3.38.1


Meanwhile, the whole sound system is fine under Ubuntu 20.04 Live Usb.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.8.0-41.46~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-41-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  car        1528 F.... pulseaudio
                      car        3528 F.... alsamixer
 /dev/snd/pcmC0D0p:   car        1528 F...m pulseaudio
 /dev/snd/controlC1:  car        1528 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Jan 29 18:14:35 2021
InstallationDate: Installed on 2021-01-27 (2 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:PCH failed
Symptom_Card: Audio Interno - HDA Intel PCH
Symptom_Jack: Speaker, Internal
Symptom_Type: Only some of outputs are working
Title: [ROG Strix G512LW_G512LW, Realtek ALC294, Speaker, Internal] Playback 
problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/13/2020
dmi.bios.release: 5.17
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: G512LW.310
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: G512LW
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.ec.firmware.release: 3.8
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrG512LW.310:bd07/13/2020:br5.17:efr3.8:svnASUSTeKCOMPUTERINC.:pnROGStrixG512LW_G512LW:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnG512LW:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: ROG Strix
dmi.product.name: ROG Strix G512LW_G512LW
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal

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https://bugs.launchpad.net/bugs/1913780

Title:
  [ROG Strix G512LW_G512LW, Realtek ALC294, Speaker, Internal] Playback
  problem

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