Hi again, I've now tested this patch set with grub-coreboot and it booted fine (I tested with LUKS1+LVM2+ext4 on a ThinkPad X200). I'll probably try a bit more tests by generating some rootfs with GRUB on the MBR. However I don't have x86_64 UEFI computers at home, so if I also need to test on UEFI x86_64 it will take more time until I ask a friend who has a computer like that. I might be able to test on ARM too but this is also not straightforward so it might also take more time (probably more than x86). Denis.