Linux Mastering Development

Why isn’t my microphone being detected by Settings|Sound|Input on Debian 10?

I’m using Debian 10. When I go to Settings, Sound, Input, everything appears gray, as if there was no microphone. However, the microphone is detected by pavucontrol. Still, the microphone is not working (it was until yesterday, with exactly the same situation on both programs). It works with my smartphone, so it’s no physical problem. […]