View Full Version : [SOLVED] Upgrade to Natty via USB stick - dual boot now error with grub

The Wagster
November 1st, 2011, 11:51 AM
Hi everyone,

I finally got around to upgrading from Karmic to Natty on my dual boot (with XP) computer. I have 2 hard drives; one for windows and one for Ubuntu. I formatted the ubuntu hard drive and installed Natty from clean using the USB stick installer method. Now when I reboot I get an error and the boot stops before grub loads and so I can't boot into windows or ubuntu.

The error message appears as:

Grub Loading Stage1.5.

Grub Loading, please wait
Error 15

How can I fix this? I do not know if I was using grub 1 or grub 2 or how I could tell!

Thanks for your help.


November 1st, 2011, 11:55 AM
I'm going to assume that the PC is still booting from same drive (probably Windows drive), and that Grub is there but can no longer find the Ubuntu installation. When you reformatted and reinstalled Ubuntu on the second drive, you probably installed a new copy of Grub there.

If you change your BIOS boot order so that it boots from the second drive, what happens?

November 1st, 2011, 11:56 AM
Try to restore the grub using live cd.

The Wagster
November 1st, 2011, 12:18 PM
Thanks for the swift replies.

Unfortunately my BIOS only has one option for Hard Drive so I can't tell it to boot from the other drive!

How would I go about restoring grub? I've searched but only found guides for after reinstalling windows, not Ubuntu! And there's different methods for grub 1 and grub 2.

November 1st, 2011, 12:20 PM
There are plenty of ways to restore grub. See here (http://www.google.com/search?client=ubuntu&channel=fs&q=how+to+restore+grub+of+Ubuntu+11.04&ie=utf-8&oe=utf-8) all are for live cd. You are using Ubuntu 11.04 and it contains grub 2.

The Wagster
November 1st, 2011, 01:43 PM
Thanks everyone. I've got it working now!:D