menuentry "ubuntu-16.04-desktop-amd64.iso" {
 set isofile="/downloads/ubuntu-16.04-desktop-amd64.iso"
 loopback loop (hd1,9)/$isofile
 linux (loop)/casper/vmlinuz.efi boot=casper iso-scan/filename=$isofile quiet noeject nopromt spalsh --
 initrd (loop)/casper/initrd.lz
}