Microphone is not working on my desktop. What I have tried to:

  1. Reinstalled alsa-base pavucontrol pulseaudio. This changed nothing

sudo apt removeauto --purge alsa-base pavucontrol pulseaudio

sudo reboot

sudo apt install alsa-base pavucontrol pulseaudio

  1. Removed pavucontrol and pulse audio. And then micro started working, but no sound control and started to appear error Error loading QML file: file:///home/noah/.local/share/plasma/plasmoids/org.kde.plasma.audiodeviceswitcher/contents/ui/main.qml:29:1: module "org.kde.plasma.private.volume" is not installed

  2. Installed pavucontrol and pulseaudio, rebooted and then sound control came back, error disappeared, but micro stopped working again

  • I have an external microphone that stopped working with Ubuntu 20.04 but worked fine before. I'm sure it's a bug. Please mention me if you found a corresponding bug issue. ;) May 19 '20 at 5:59
  • @alexanderadam, have you tried my solution bellow? May 19 '20 at 16:25
  • Yes I did. This wasn't my problem though. In my case the microphone isn't always recognized since 20.04. May 20 '20 at 6:59
  • In my case I solved the problem with this answer. Jul 13 '20 at 12:43

Ok, so this is what fixed this issue for me

  1. Run command pavucontrol or just open pavu volume control in apps
  2. Go to 'Input Devices'
  3. Scroll down to 'Built-in Audio Analog Stereo'
  4. Click on lock icon
  5. Set 'Front Right' slider to zero
  6. Adjust 'Front Left' so you get clean sound

I think that you may try to go with 'Front Left' to zero instead, based on you mic.

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