Disclaimer: Lithium batteries can be very dangerous, there is risk of fire or explosions if you don t use them in the right way . In case of fire, don' t use water to estinguish them. I successfully re-celled a t420/t430 70+ six cell battery. Few months ago I read this post explaining how to...

Hi charlotteplusplus SainitDxe has guid DE23ACEE-CF55-4FB6AA77-984AB53DE811, you can easily find it searching for hex pattern 24 56 42 ( => VBT ) with UEFITool.

Thank you, no idea if it'll work, but I think it worths a try. Opening VBIOS dat in a hex editor shows in 2089 a "VBT SNB-mobile" where in 2170 there is a "VBT SNB / IVB mobile ", so there is a real possibility that last VBIOS contains IVB instructions. About the coreboot, I've contacted the...