Thread: Booting Natty iso from USB on MBP (8,1) using Grub2

after 2 days, have refit, grub2 w/ efi support booting ubuntu 64 bit's kernel usb flash drive on mbp(8,1), not seem able find iso file boot from. here's grub.cfg

code:

menuentry "ubuntu live 11.04 64 bit" { insmod efi_gop set iso=/ubuntu-11.04-desktop-amd64.iso loopback loop $iso linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$iso noeject noprompt noefi -- initrd (loop)/casper/initrd.lz }

the error after kernel loads is:

code:

/scripts/casper-premount/20iso_scan: line 46: can't open /dev/sr0: no medium found  not find iso /ubuntu-11.04-desktop-amd64.iso <cut> (initramfs)

at point keyboard non-functional @ initramfs prompt

hoping has sage advice. can boot if dump squashfs filesystem on flash drive or had natty disc in system, not work needs.

i not know if works efi boots.

stanza used install from. think need add quotes on set isofile line. have have nomodeset boot nvidia card.

code:

menuentry "ubuntu 11.04 natty 64bit" {     set isofile="/boot/iso/ubuntu-11.04-desktop-amd64.iso"     loopback loop $isofile      linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile nomodeset noprompt     initrd (loop)/casper/initrd.lz }

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