grub2 follies

 blast --fs-uuid)  
   
 /etc/defaults/grub uncommented the line:  
   
 GRUB_DISABLE_LINUX_UUID=true  
   
 /usr/share/grub/grub-mkconfig_lib :  
   
  # If there's a filesystem UUID that GRUB is capable of identifying, use it;  
  # otherwise set root as per value in device.map.  
   fs_hint="`"${grub_probe}" --device $@ --target=compatibility_hint`"  
   if [ "x$fs_hint" != x ]; then  
    echo "set root='$fs_hint'"  
   fi  
   if fs_uuid="`"${grub_probe}" --device $@ --target=fs_uuid 2> /dev/null`" ; then  
    hints="`"${grub_probe}" --device $@ --target=hints_string 2> /dev/null`" || hints=  
    echo "if [ x\$feature_platform_search_hint = xy ]; then"  
    echo " search --no-floppy --fs-uuid --set=root ${hints} ${fs_uuid}"  
    echo "else"  
    echo " search --no-floppy --fs-uuid --set=root ${fs_uuid}"  
    echo "fi"  
  fi  
  IFS="$old_ifs"  
   
 and changed the following lines:  
   
   if fs_uuid="`"${grub_probe}" --device $@ --target=fs_label 2> /dev/null`" ; then  
   
   
    echo " search --no-floppy --label --set=root ${hints} ${fs_uuid}"  
   
   
    echo " search --no-floppy --label --set=root ${fs_uuid}"  
   
 run update2-grub --output=/boot/grub2/grub.cfg