We've seen this happen with some other Gigabyte boards with ISA mod recently as well (not being able to enter setup). I think it's worth trying an oem mod. I can make one later tonight. (Still at work but will be going home shortly.) If you'd like to help Tommy improve the ISA module you can upload an ACPI scope report for him to check out. If he gets a few of these he may be able to find what needs to be changed to make it compatible with the new BIOS.