12-28-2019, 05:11 AM
After doing some research, I discovered that it is possible to unlock the Advanced menu on other Lenovo BIOS by setting an efivar. I downloaded the BIOS ISO for the X1 Carbon 6th Gen from Lenovo's Website and ran it through UEFITool and IFR Extractor and found that a hidden Advanced menu exists (results attached). However, I do not know how I can access this hidden menu. I could directly edit the settings since the offsets are all in the IFR dump, but some of the settings like Voltage Offset go from 0 to 1000 and I do not know what units those settings are in (I would guess mV, but I don't want to break anything). How would I search for a hidden key combo or an efivar to unlock this menu?