*** This bug is a duplicate of bug 477104 ***
https://bugs.launchpad.net/bugs/477104
I had the same problem. I installed Ubuntu 9.10 for AMD64 via Wubi under
Windows Vista. It did the Windows portion of the install, rebooted and
did the Linux portion of the install, rebooted, and failed at grub.
I experimented based on some of the things mentioned by others above.
For me, the following worked to fix this problem:
Boot from the live CD.
Mount the windows disk. (I clicked on it from the Places menu to do this).
Mount the disk image, bind mount /dev, chroot, and upgrade the system.
sudo mount /media/[UUID]/ubuntu/disks/root.disk /mnt -o loop
sudo mount --bind /dev /mnt/dev
sudo chroot /mnt
apt-get update
agt-get upgrade
After this, I rebooted and was able to successfully boot into Ubuntu.
I expect that it would have worked if I had only upgraded the grub-
related packages.
Don't run update-grub2! I tried that on my first attempt at a fix, but
doing so, at least in the chrooted environment, couldn't find all the
information it needed, and it trashed the grub config files.
--
Ubuntu 9.10 beta does not boot
https://bugs.launchpad.net/bugs/443107
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