Comment 0 for bug 738345

The 10_lupin script generates menu entries to boot Wubi installs. The following entry has been created:
### BEGIN /etc/grub.d/10_lupin ###
menuentry "Ubuntu, Linux 2.6.38-7-generic" {
 insmod ext2
 set root='(/dev/loop0)'
 search --no-floppy --fs-uuid --set=root 23b0f259-6cdd-4cd2-bc50-8febbcb784b0
 loopback loop0 /ubuntu/disks/root.disk
 set root=(loop0)
 linux /boot/vmlinuz-2.6.38-7-generic root=UUID=80E4E195E4E18DAA loop=/ubuntu/disks/root.disk ro quiet splash
 initrd /boot/initrd.img-2.6.38-7-generic
}

The UUID 23bf... is the loop device /dev/loop0. The file /ubuntu/disks/root.disk is not on the loop device, it's on the host (UUID=80E4...). So to 1) set root to /dev/loop0 which it should be, override to /dev/loop0 by uuid, and then try to loop mount /ubuntu/disks/root.disk won't work.

On a lucid wubi it looks similar to this:
### BEGIN /etc/grub.d/10_lupin ###
menuentry "Ubuntu, Linux 2.6.32-27-generic" {
    insmod ntfs
    set root='(hd0,1)'
    search --no-floppy --fs-uuid --set 80E4E195E4E18DAA
    loopback loop0 /ubuntu/disks/root.disk
    set root=(loop0)
    linux /boot/vmlinuz-2.6.32-27-generic root=/dev/sda1 loop=/ubuntu/disks/root.disk ro quiet splash
    initrd /boot/initrd.img-2.6.32-27-generic
}

I'm not sure exactly what the cause of the message is - but after selecting to boot, the next screen you get a blank screen with:
"Error: file not found.
Press any key to continue"
After pressing a key it then boots normally.

This did not happen on the initial install, so I assume it's changed since running updates.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: lupin-support 0.33
ProcVersionSignature: Ubuntu 2.6.38-7.36-generic 2.6.38
Uname: Linux 2.6.38-7-generic i686
Architecture: i386
Date: Sat Mar 19 10:52:15 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110314)
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: lupin
UpgradeStatus: No upgrade log present (probably fresh install)