adding a grub menu entry for refind

[songbird]

  you may need to change where the root is in the script below
using the file /etc/grub.d/40_custom replace it with:
=====
#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
#
menuentry "Refind Menu" {
    insmod part_gpt
    insmod fat
    insmod chain
    root=hd0,1
    chainloader /EFI/BOOT/BOOTX64.EFI
    }
=====

and then run update-grub


  songbird