I have a Plantronics USB headset plugged into a ThinkPad running Windows 7. Every once in a while - in particular after my computer awakes from Sleep Mode - my USB headset stops working. In fact, all audio on my computer stops working -- nothing comes out of the computer speakers even when I unplug, and even my standard 1/8" audio headset does not work. Still, when I plug in or pull out the USB headset, the computer recognizes it (the volume bar pops up onscreen).
I suspect the problem has something to do with my soundcard or driver (which is updated), but I'm not sure what the solution is.
How can I fix this problem so I can listen to music without restarting?