What part is failing? Do you see the grub bootloader or is it failing before that? If you do systemd (which is what I'm using), then you might look at systemd

What part is failing? Do you see the grub bootloader or is it failing before that? If you do systemd (which is what I'm using), then you might look at systemd.boot for UEFI. That's currently what I'm using. I ask, because one issue I ran into was messing up the kernel config. Pulling the livecd config in and using that as the base config worked for me.