[HDA-Intel - HDA Intel PCH, playback] No sound at all

[bhanu]

Internal microphone not working in ubuntu 20.Please help me solve this.please inform me if you need any further info to fix this issue.thanks in advance

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.15.0-69.76~20.04.1-generic 5.15.87
Uname: Linux 5.15.0-69-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.25
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: isolated 1624 F.... pulseaudio
 /dev/snd/pcmC0D0p: isolated 1624 F...m pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Tue Jul 18 13:09:18 2023
InstallationDate: Installed on 2021-02-21 (876 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: isolated 1624 F.... pulseaudio
Symptom_Type: No sound at all
Title: [HDA-Intel - HDA Intel PCH, playback] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/09/2020
dmi.bios.release: 1.33
dmi.bios.vendor: LENOVO
dmi.bios.version: CJCN33WW
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.ec.firmware.release: 1.33
dmi.modalias: dmi:bvnLENOVO:bvrCJCN33WW:bd12/09/2020:br1.33:efr1.33:svnLENOVO:pn20RV:pvrLenovoThinkBook14-IML:rvnLENOVO:rnLNVNB161216:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvr:skuLENOVO_MT_20RV_BU_idea_FM_LenovoThinkBook14-IML:
dmi.product.family: Lenovo ThinkBook 14-IML
dmi.product.name: 20RV
dmi.product.sku: LENOVO_MT_20RV_BU_idea_FM_Lenovo ThinkBook 14-IML
dmi.product.version: Lenovo ThinkBook 14-IML
dmi.sys.vendor: LENOVO
mtime.conffile..etc.modprobe.d.alsa-base.conf: 2023-07-18T12:45:45.793136