Comment 62 for bug 1851311

if loadfont /boot/grub/font.pf2 ; then
 set gfxmode=auto
 insmod efi_gop
 insmod efi_uga
 insmod gfxterm
 terminal_output gfxterm
 rmmod tpm
fi

set menu_color_normal=white/black
set menu_color_highlight=black/light-gray

set timeout=5
menuentry "ubuntu-20.04 ISO" {
    set root=(hd0,3)
    set isofile="/ubuntu-20.04-desktop-amd64.iso"
        loopback loop $isofile
        linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile fsck.mode=skip persistent persistent-path=/ubuntu-20.04/ splash --
        initrd (loop)/casper/initrd
}