Hi Josef, Could you please help to verify the shim package from this project which will set explicit target option to grub2-install to avoid the error of wrong target being detected and used. (due to missing /sys/firmware/efi) ... https://build.opensuse.org/package/show/home:michael-chang:branches:devel:openSUSE:Factory/shim Still .. I am not certain if other error will happen, for eg, during efibootmgr reading and writing efi boot variables, as it seems the operation depended on /sys/firmware/efi to work as well ...