[Bug 549691] Re: post-inst script loops forever, repeatedly finding the same kernel image

[Marius Gedminas]

I attempted to fix the situation with

  sudo apt-get install linux-image-2.6.31-21-generic --reinstall

and voila, Ubuntu doesn't boot at all.  I get the Windows bootloader,
select Ubuntu (remember, this is a Wubi system), then Grub2 beeps about
weird errors and gives me a shell.

The shell has (hd0,1)/ubuntu/disks/root.disk mounted on (loop0), and I
can do things like ls /boot/grub, cat /boot/grub/grub.cfg (full of
binary garbage!), and even boot the OS by typing fun-and-user-friendly-
commands like

  linux /boot/vmlinuz-2.6.31-19-generic root=/dev/sda1 loop=/ubuntu/disks/root.disk ro
  initrd /boot/initrd-2.6.31-19-generic
  boot

If I try -21-generic instead of -19-generic, Linux fails to boot (after
complaining that initrd could not be uncompressed and then failing to
mount the root filesystem and panicking).

If I boot from a LiveCD, mount the NTFS filesystem, then loop-mount
/media/disk/ubuntu/disks/root.disk, I can look at /boot/grub/grub.cfg
(it looks fine, no binary garbage in sight) or unpack the initrd with cd
/tmp; zcat /boot/initrd-2.6.31-21-generic|cpio -i (again, no errors).

Could it be that grub2's ext4 support is buggy?

I now think that the original bug (post-inst looping forever) is not the
cause of my sister's boot problems, and will file a new bug.

-- 
post-inst script loops forever, repeatedly finding the same kernel image
https://bugs.launchpad.net/bugs/549691
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