I yesterday updated my Gigabyte X58A-UD3R (rev. 2.0) from BIOS version FE1 to FH. The settings were reset in the process.
My OS is Windows 7 64 Bit and now the standby stopped working. The PC still goes in standby. When waking up, I see the login screen but after entering my credentials the PC hangs and reboots after some time.