
In the majority of cases where hardware is at fault, folks plug in a jack with two central bands (headphones with microphone support) into a socket expecting only one central band (headphones only). If there is no clean contact, then the OS (via the audio subsystem) may either not recognise what you have inserted, or not recognise that you have inserted anything at all. If the socket on your computer is expecting one type of jack, and you plug in the other type of jack, then you may not end up with a 'clean' contact. Many headphones have inbuilt microphones and, as a result, the headphone jack has one more contact than those that do not have inbuilt microphones.


I'm running Ubuntu 20.04 on a custom built computer with a B450 Tomahawk motherboard. The issue that I'm having is that headphones plugged into the 3.5mm jack on the front of my desktop computer are not always detected.
