I'm running Crunchbang++ (Debian stretch with pulseaudio).
When I plug in my headset, the laptop's mic works but not the one of the headset -- that would be OK. But when I unplug it, I can see in "Sound preferences" the "connector" switching from "Microphone" to "Internal microphone" which is recording constant noise only. But even when I switch back manually to "Microphone" nothing gets recorded (silence).
So right now, I can not do a call on my laptop without the headset on, which is bad when I want to have everybody in the room to be able to listen.
I'd like to use the internal mic without the headset, using the headset's mic when it's plugged is not even that important.
I found lots of posts everywhere on how to keep the internal mic on when plugging in in the headset. But my situation is almost the inverse.
What could cause this strange behavior? ... and how could I fix it?