[VivoBook_ASUSLaptop X509JA_X509JA, Realtek ALC256, Mic, Internal] Underruns, dropouts or crackling sound

[Kaleab Asfaw Azezew]

The crackling sound happens both with the builtin mic and headset mic. And it doesn't happen when I boot to windows.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.4.0-122.138-generic 5.4.192
Uname: Linux 5.4.0-122-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: blankk 1760 F.... pulseaudio
 /dev/snd/pcmC0D0c: blankk 1760 F...m pulseaudio
 /dev/snd/pcmC0D0p: blankk 1760 F...m pulseaudio
 /dev/snd/timer: blankk 1760 f.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Jul 31 16:41:55 2022
InstallationDate: Installed on 2022-02-06 (175 days ago)
InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:PCH successful
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Mic, Internal
Symptom_PulseAudioLog:
 Jul 31 16:20:16 blankk-Lenovo-V15-IWL dbus-daemon[1078]: [system] Activating via systemd: service name='org.freedesktop.RealtimeKit1' unit='rtkit-daemon.service' requested by ':1.30' (uid=125 pid=1309 comm="/usr/bin/pulseaudio --daemonize=no --log-target=jo" label="unconfined")
 Jul 31 16:20:29 blankk-Lenovo-V15-IWL systemd[1303]: pulseaudio.service: Succeeded.
 Jul 31 16:20:39 blankk-Lenovo-V15-IWL systemd[1303]: pulseaudio.socket: Succeeded.
Symptom_PulseAudioRecordingTest: PulseAudio recording test through plughw:PCH successful
Symptom_Type: Underruns, dropouts, or "crackling" sound
Title: [VivoBook_ASUSLaptop X509JA_X509JA, Realtek ALC256, Mic, Internal] Underruns, dropouts or crackling sound
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/11/2021
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: X509JA.308
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: X509JA
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.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX509JA.308:bd06/11/2021:svnASUSTeKCOMPUTERINC.:pnVivoBook_ASUSLaptopX509JA_X509JA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX509JA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: VivoBook
dmi.product.name: VivoBook_ASUSLaptop X509JA_X509JA
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
mtime.conffile..etc.modprobe.d.alsa-base.conf: 2022-04-08T12:21:11.032664