You can try opening the terminal and pasting the following command into
it, then reboot your machine. You should have a new, silent microphone
called "Null Source".echo "load-module module-null-source" | sudo tee -a
I worked around the issue by adding this at the bottom of
/etc/pulse/default.pa (or a file in default.pa.d for distros which have
that folder): load-module module-null-source This creates a fake
microphone that will be used if the real one isn't pres...