[USB-Audio - USB PnP Audio Device, playback] Underruns, dropouts or crackling sound

[Dávid Kiss]

Additional information:
lsb_release -rd
Description: Ubuntu 20.04.2 LTS
Release: 20.04

apt-cache policy pulseaudio
pulseaudio:
  Installed: 1:13.99.1-1ubuntu3.11
  Candidate: 1:13.99.1-1ubuntu3.11
  Version table:
 *** 1:13.99.1-1ubuntu3.11 500
        500 http://hu.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:13.99.1-1ubuntu3.8 500
        500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages
     1:13.99.1-1ubuntu3 500
        500 http://hu.archive.ubuntu.com/ubuntu focal/main amd64 Packages

apt-cache policy libasound2
\libasound2:
  Installed: 1.2.2-2.1ubuntu2.4
  Candidate: 1.2.2-2.1ubuntu2.4
  Version table:
 *** 1.2.2-2.1ubuntu2.4 500
        500 http://hu.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1.2.2-2.1 500
        500 http://hu.archive.ubuntu.com/ubuntu focal/main amd64 Packages

It's either caused by ALSA or pulse. I've tried multiple "solutions", but nothing worked so far.
I'd really like if audio worked normally, as this is making me hard to do video meetings on my Ubuntu rig, which I use for development.

When the issue occurred first, I was using STOCK settings. Only thing that I've added to pulse conf was an auto-select for the correct devices:
```
set-default-sink 0
set-default-source 2
```

I did try the following to no avail:
`load-module module-udev-detect tsched=0`
`load-module module-echo-cancel source_name=noechosource sink_name=noechosink`

`pulseaudio -k` seems to fix the sound for a few minutes.

As I've read, many Ryzen owners have similar issues. I'm more than willing to try out different package versions, settings - you name it.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.8.0-53.60~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-53-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon Jul 12 10:50:06 2021
InstallationDate: Installed on 2021-05-01 (72 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:Device failed
Symptom_Card: Loopback - Loopback
Symptom_PulseAudioLog:
 júl 12 08:30:15 lordy-desktop dbus-daemon[904]: [system] Activating via systemd: service name='org.freedesktop.RealtimeKit1' unit='rtkit-daemon.service' requested by ':1.30' (uid=1000 pid=1128 comm="/usr/bin/pulseaudio --daemonize=no --log-target=jo" label="unconfined")
 júl 12 09:54:36 lordy-desktop sudo[9796]: lordy : TTY=pts/0 ; PWD=/home/lordy ; USER=root ; COMMAND=/usr/bin/systemctl --user restart pulseaudio.service
Symptom_Type: Underruns, dropouts, or "crackling" sound
Title: [USB-Audio - USB PnP Audio Device, playback] Underruns, dropouts or crackling sound
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/13/2020
dmi.bios.release: 5.17
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.20
dmi.board.name: B550 Phantom Gaming 4
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.20:bd08/13/2020:br5.17:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnB550PhantomGaming4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.