You are right, it worked for me, because I have a separate /boot partition. After changing the uuid of /boot, the machine does not boot.
But IMO it's a problem of grub, using this sort of code in grub.cfg: if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root 31147a1b-b3d3-1234-93ee-93854ac2505d else search --no-floppy --fs-uuid --set=root 31147a1b-b3d3-1234-93ee-93854ac2505d fi If if would not use uuids here, it may work. -- regards Thomas
