Thanks for all the suggestions! Unfortunately they didn't work...

- DDU'd the AMD graphics drivers, installed the latest, no dice
- BIOS is latest already, so didn't touch it
- Rolled back...

Hi guys! I'm starting to pull my hear out... Up until today everything worked. My Hauppauge Wintv-Hvr-935 HD USB tuner was plugged into one of the rear USB slots, and the machine slept just fine....