I am running Ubuntu 18.04.4 on a Lenovo Thinkpad T400. I have been using the microphone in the past without problems with applications such as Google Hangouts, Skype, ... - Recently, I tried to have a call and noticed that the microphone stopped working. Speakers are fine. I cannot tell how long the microphone misfunctions or if it stopped working with a software update or such.
What I tried
I checked System Settings / Sound / Input - there is nothing muted and the input level does not recognize any sound.
I checked
alsamixer
but could not find anything unusual. Here a screenshot where the internal microphone is selected (last column, red).I checked
puvacontrol
. Nothing suspicious there.I tried
sudo alsa force-reload
and the rebooting. No success.I tried reinstalling
alsa-base
andpulseaudio
:sudo apt-get remove alsa-base pulseaudio sudo apt-get install alsa-base pulseaudio sudo alsa force-reload
Rebooting after. Microphone is still not working.
When I plug in an external microphone then the input level in System Settings / Sound / Input does successfully recognize the sound.
I let the pulse configuration to be created freshly:
mv ~/.config/pulse/ ~/.config/pulse.BAK
Rebooting after. Microphone is still not working.
Question
What can I do to fix the microphone?
Please let me know if I can provide any information such as alsa-info
to diagnose the issue.