update-grub is setting a wrong linux root partition

Posted by adrian m on Ask Ubuntu See other posts from Ask Ubuntu or by adrian m
Published on 2012-08-22T09:21:50Z Indexed on 2014/06/06 15:42 UTC
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Filed under:

grub2

|

partitioning

|

root

Initially, Ubuntu was installed on another partition (sda5 or sda4).

At some point I did manually move the root partition to sda2.

Now, the problem is that whenever a new kernel is installed, the automatic regeneration of the menu.lst is using the OLD Linux partition. So I have to manually change in menu.lst the lines :

root            (hd0,5)

into

root            (hd0,1)

How can I configure update-grub to automatically generate menu.lst with the current Linux root partition? I assume that the (hd0,5) was written somewhere at installation, but I couldn't find it.

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