Remember, when flashing the bios, you must also perform a CLRTC. Basically you have to reset the BIOS by pulling out the CMOS battery from the motherboard. I didn't do this at first, and whenever I'd shutdown, my computer would still be on, but not doing anything. Apparently this was an incompatible configuration issue in the BIOS. I also just tested this with sleeping after reseting the CMOS. It works!