Hello, I'm having tthis trouble. I have a Behringer U-CONTROL UCA202 USB Sound Card, and when I used to reboot my laptop HP dv6721la with the usb card connected, it was always my default card. Today I realized that it's not working, I mean the card It's working but it doesn't matter if it is connected to my laptop the default system sound is by the nvidia internal card and not by the usb card.
How can i fix this???