search --set=root --file /ubuntu

insmod all_video

set default="0"
set timeout=30

menuentry "Try Ubuntu FS without installing" {
   linux /casper/vmlinuz file=/cdrom/preseed/mbp.seed boot=casper ro quiet splash pcie_ports=compat ---
   initrd /casper/initrd
}
menuentry "Install Ubuntu FS" {
   linux /casper/vmlinuz preseed/file=/cdrom/preseed/mbp.seed boot=casper only-ubiquity quiet splash pcie_ports=compat ---
   initrd /casper/initrd
}
menuentry "Check disc for defects" {
   linux /casper/vmlinuz boot=casper integrity-check quiet splash pcie_ports=compat ---
   initrd /casper/initrd
}