General :: USB Audio Detected But Doesn't Work

you have an onboard soundcard that you have or may not have disabled in the BIOS, and you intend to use headphones with a USB sound card with headphone and microphone jacks (or no mic jack, it doesn't matter), but you notice that the headphones are detected. Alsamixer provides an interface to control the volume, etc etc, but still the headphones do not work..In my case, the module snd_hda_intel was being loaded for my onboard soundcard that I had disabled in the BIOS before booting the computer for the first time, and even though I tried to "activate" the USB headset in alsamixer, I still couldn't get the headset to work.

Solution as a trial: Open a terminal, and look to the code section for what you need to type.A big missing key to my puzzle is how to simply restart and/or reload a module so that it isn't necessary to unplug and plug back in the USB device. Can't I just re-discover the USB devices? (or other such hardware, such as a PCI card, or otherwise inaccessible component?)