why I can not use the 3.2 kernel

[Tom H]

On Sun, Nov 18, 2012 at 8:29 PM, Chen Liang <slimhigh at gmail.com> wrote:
>
> slim at lab:~$ sudo update-grub
> [sudo] password for slim:
> Searching for GRUB installation directory ... found: /boot/grub
> Searching for default file ... found: /boot/grub/default
> Testing for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst
> Searching for splash image ... none found, skipping ...
> Found kernel: /boot/vmlinuz-3.2.0-34-generic
> Found kernel: /boot/vmlinuz-3.2.0-33-generic
> Found kernel: /boot/vmlinuz-3.2.0-31-generic
> Found kernel: /boot/vmlinuz-3.0.0-20-generic
> Found kernel: /boot/memtest86+.bin
> Updating /boot/grub/menu.lst ... done
>
> The 3.2 kernel titles do show in the menu.lst, but when I restart my
> computer, I can't see the options. I really don't know why!

What's the output of the script at [1]?

You're updating your grub1 menu but it may be that you're, somehow,
booting from grub2.

1. http://sourceforge.net/projects/bootinfoscript/files/bootinfoscript/