Ubuntu Error 15

**Richard B Rufus** · 10-03-2009

hello.
My ubuntu no longer works on startup and gives this without any explanation ...
find - set-root - ignore-floppies / unbuntu / install / boot / vmlinux
Have you got any idea? Thank you

**nitesh mehta** · 10-03-2009

I have found a solution.

When it sends you back to the list of choices, hit "c"
That will bring you to a Grub prompt.
grub>
If you installed a /boot partition, do

Code:

find /grub/stage1

If you did not do a /boot partition [most likely choice] do

Code:

find /boot/grub/stage1

One of these commands will give you an answer like

Code:

root (hd0.0)

Now press Esc.
Select the first boot option and press "e"

Press "e" again on the root option
Change the hd(X,X) to whatever you got above. for me it was hd (0,0).
Press Enter.
Now press "b"

Ubuntu should load up.

Now that you are in, you need to change this for good.
Open a terminal and enter

Code:

sudo gedit /boot/grub/menu.lst

or, depending on your setup

Code:

sudo gedit /grub/menu.lst

Scroll down towards the bottom of the file, and you will find the same "root (hdX,X)" change it appropriately, and you can save!

Also while editing, you can go ahead and change all of the root options for the different ubuntu modes, because they are all most likely wrong.

**newtech** · 10-03-2009

Can you post your menu.lst and your drive setup?

Go to the terminal and type "sudo fdisk -l". That's l as in library. To get your menu.lst file, type into the terminal "cat /boot/grub/menu.lst". Then just copy and paste that into your post.

**Team Leader** · 10-03-2009

This issue is caused by the way you boot Ubuntu. When you select to boot from your second hard disk in the bios, the drive numbers for the first and second had disk are swapped. So while your Ubuntu hard disk is hd1 during installation, it becomes hd0 when you boot from that disk.
You could prevent this problem by installing grub on your first (windows) hard disk. Grub would then give you a menu to boot either Windows (on the first disk) or Ubuntu (on the second disk), and you would not need to change the boot order in the bios anymore.