I recently upgraded to Ubuntu 21.10 and the audio pipes through only the monitor. I have tried playing around in pavucontrol and this is what I see
Here is the output from the terminal
$ cat /proc/asound/cards
0 [PCH ]: HDA-Intel - HDA Intel PCH
HDA Intel PCH at 0xa3510000 irq 142
1 [C920 ]: USB-Audio - HD Pro Webcam C920
HD Pro Webcam C920 at usb-0000:00:14.0-6, high speed
2 [NVidia ]: HDA-Intel - HDA NVidia
HDA NVidia at 0xa3080000 irq 17
3 [Device ]: USB-Audio - USB PnP Audio Device
USB PnP Audio Device at usb-0000:00:14.0-9, full speed
Any suggestions how to set the audio to come from line out. Even when I manually select Line Out from the system settings, audio only comes via the monitor.