Sorry! I should make it clear for how to test. Please use these commands to install os-prober test package and update grub2 menu. zypper in http://download.opensuse.org/repositories/home:/michael-chang:/Leap:/42.1:/Update/standard/x86_64/os-prober-1.61-18.1.x86_64.rp grub2-mkconfig -o /boot/grub2/grub.cfg