(In reply to Arvin Schnell from comment #3) > https://bugzilla.suse.com/show_bug.cgi?id=887888#c37 shows that the extra > /boot partition was needed. No, the opposite: this comment is from me and documents, what for grub2 needs to be changed that it works without extra /boot partition. And snwint fixed it afterwards in perl-Bootloader.