I don't have any sound unless I use my usb soundcard. It says no devices listed. It used to work. I am not sure why it stopped. I might have connected a bluetooth headphones just before this happened but I don't know what caused it.

Pulsaudio is already installed. pulse audio volume control shows a stream but still no sound output devices are shown.

What happened? It was probably an update that did this.

I also have Ubuntu mate. The sound device is shown and works fine. what do I need to do?

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