(In reply to Leslie Satenstein from comment #25) > is the problem osprober to grub or grub itself? No, the os-prober was based on my own Leap update project with new patches to btrfs issues. Much likely there's regression in it because /dev/sde6 is btrfs (sigh) .. I'll build a patch based on released Leap project and please help to verify again. Thanks a lot.