Public bug reported:

Technical information:
Description:    Ubuntu 20.04.3 LTS
Release:        20.04


Recently I bought a "Jieli Technology USB PHY 2.0" which is a cheap webcam with 
an integrated microphone. The webcam behaves just fine, where the microphone 
outputs noise.

Looking at dmesg, the log is spammed with:
[ 3657.927446] xhci_hcd 0000:00:14.0: WARN: buffer overrun event for slot 4 ep 
4 on endpoint

I've applied [this 
patch](https://mailman.alsa-project.org/pipermail/alsa-devel/2020-December/178361.html)
 manually on linux-source-5.4.0.tar.bz2 to see if the microphone works after 
that.
Unfortunately the microphone wasn't detected by pulseaudio and I've tried 
tuning values with guvcview, but to no avail.

I'm about to test another patch for this issue.
https://www.spinics.net/lists/alsa-devel/msg132769.html

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.11.0-43-generic 5.11.0-43.47~20.04.2
ProcVersionSignature: Ubuntu 5.11.0-43.47~20.04.2-generic 5.11.22
Uname: Linux 5.11.0-43-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: GNOME
Date: Sat Dec 18 14:58:51 2021
InstallationDate: Installed on 2020-08-07 (498 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: linux-signed-hwe-5.11
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux-signed-hwe-5.11 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal

** Attachment added: "version.log"
   
https://bugs.launchpad.net/bugs/1955304/+attachment/5548514/+files/version.log

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https://bugs.launchpad.net/bugs/1955304

Title:
  Webcam integrated microphone produces noise

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