I'm having a similar issue, except that it will play the sound through my HDMI cable to my TV, and when I plug in my headset it still plays through TV. Do I also need to disable the driver and then re-enable when I want the sound back through there?
I also left my headset plugged in, left for a few hours, and the sound was all coming through the head set, but when I unplugged, I couldn't get it back through my TV...haha. Any suggestions?
Also, my computer seems to think I never have a mic plugged in either.