[22V280-L.BY31P1, Realtek ALC256, Speaker, Internal] No sound at all

[Alberto Jorge Mesquita da Costa]

Som desaparece e não consigo escutar audios de youtube ou outros

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.13.0-51.58~20.04.1-generic 5.13.19
Uname: Linux 5.13.0-51-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: alberto 1041 F.... pulseaudio
 /dev/snd/pcmC0D0c: alberto 1041 F...m pulseaudio
 /dev/snd/pcmC0D0p: alberto 1041 F...m pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sat Jun 18 22:28:20 2022
InstallationDate: Installed on 2022-03-22 (89 days ago)
InstallationMedia: Ubuntu 20.04.4 LTS "Focal Fossa" - Release amd64 (20220223)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed
Symptom_Card: Áudio interno - HDA Intel PCH
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: alberto 1041 F.... pulseaudio
 /dev/snd/pcmC0D0c: alberto 1041 F...m pulseaudio
 /dev/snd/pcmC0D0p: alberto 1041 F...m pulseaudio
Symptom_Jack: Speaker, Internal
Symptom_Type: No sound at all
Title: [22V280-L.BY31P1, Realtek ALC256, Speaker, Internal] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/01/2018
dmi.bios.release: 0.1
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: 22VC0251 X64
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 22V280
dmi.board.vendor: LG Electronics
dmi.board.version: FAB1
dmi.chassis.asset.tag: Asset Tag
dmi.chassis.type: 13
dmi.chassis.vendor: LG Electronics
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr22VC0251X64:bd08/01/2018:br0.1:svnLGElectronics:pn22V280-L.BY31P1:pvr0.1:rvnLGElectronics:rn22V280:rvrFAB1:cvnLGElectronics:ct13:cvr0.1:sku:
dmi.product.family: V Series
dmi.product.name: 22V280-L.BY31P1
dmi.product.version: 0.1
dmi.sys.vendor: LG Electronics