Grub help

Hi guys. How do I install Ubuntu's bootloader to the root partition? I want to chainload it from SUSE's bootloader which is on the MBR

Thanks

 

yes, i'm well out of my depth (i think) are you trying to install Unbuntu's bootloader to the first sector of bootable partition, and boot Ubuntu through SUSE's bootlloader on MBR

 

Make sure your menu.lst is correct, and then in Ubuntu do

Code:

grub-install /dev/hdax

 

Hey mega

What is your ubuntu's drive?

Typicaly the entry in /boot/grub/menu.lst should be along the lines of:
italic font is only for explenation

try without the mapping lines first
see how you get on.
If this does not work and you are not sure how to, I can show you how to find out exactly where your Ubuntu sits.

edit - sorry mega.. did not get it first time. I was assuming Ubuntu was already installed.
Is it?

 

Thanks guys

Yeah, ubuntu was already installed but it's bootloader got erased when I installed SUSE. I wanted to use SUSE's bootloader because it looks better Besides, it's much easier to configure bootloaders in SUSE.

I am actually triple booting with Ubuntu, SUSE and Elive

 

[ot] right, I thought you just wanted to add an entry to the menu list.... :O [/ot]

 

Hold on, it didn't work! :doh:

I wrote ubuntu's bootloader to /dev/hdb1 and configured SUSE's bootloader to chainload it. When I restarted my computer and selected 'Ubuntu' from the bootloader I just get thrown back to the SUSE bootloader again

This is the partition table:

/dev/hda1 = SUSE boot
/dev/hda2 = Swap
/dev/hda3 = SUSE home
/dev/hda4 = Elive boot & home
/dev/hdb1 = Ubuntu root
/dev/hdb2 = Swap
/dev/hdb3 = Ubuntu home

 

Can you show your menu.lst?

 

SUSE's menu.1st

You will see two Ubuntu entries. The first one is supposed to chainload to Ubuntu's GRUB bootloader but doesn't. The second Ubuntu entry actually boots Ubuntu directly without the need for Ubuntu's own bootloader.

Code:

# Modified by YaST2. Last modification on Sat Sep 30 18:27:49 BST 2006

color white/blue black/light-gray
default 0
timeout 3
gfxmenu (hd0,0)/boot/message


title Ubuntu
    chainloader (hd1,0)+1

###Don't change this comment - YaST2 identifier: Original name: linux###
title SUSE LINUX 10.0
    root (hd0,0)
    kernel /boot/vmlinuz root=/dev/hda1 vga=0x317 selinux=0    resume=/dev/hda2  splash=silent showopts
    initrd /boot/initrd


title eLive
    chainloader (hd0,3)+1

###Don't change this comment - YaST2 identifier: Original name: floppy###
title Floppy
    chainloader (fd0)+1

###Don't change this comment - YaST2 identifier: Original name: failsafe###
title Failsafe -- SUSE LINUX 10.0
    root (hd0,0)
    kernel /boot/vmlinuz root=/dev/hda1 vga=normal showopts ide=nodma apm=off acpi=off noresume selinux=0 nosmp noapic maxcpus=0 edd=off 3
    initrd /boot/initrd


title Ubuntu, kernel 2.6.15-27-686 (/dev/hdb1)
    kernel (hd1,0)/boot/vmlinuz-2.6.15-27-686 root=/dev/hdb1 ro quiet splash
    initrd (hd1,0)/boot/initrd.img-2.6.15-27-686

Ubuntu's menu.1st. I need to erase the Windows entries because it does not exist anymore

Code:

# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not change this entry to 'saved' or your
# array will desync and will not let you boot your system.
default		0

## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout		3

title		Ubuntu, kernel 2.6.15-27-686
root		(hd1,0)
kernel		/boot/vmlinuz-2.6.15-27-686 root=/dev/hdb1 ro quiet splash
initrd		/boot/initrd.img-2.6.15-27-686
savedefault
boot

title		Ubuntu, kernel 2.6.15-27-686 (recovery mode)
root		(hd1,0)
kernel		/boot/vmlinuz-2.6.15-27-686 root=/dev/hdb1 ro single
initrd		/boot/initrd.img-2.6.15-27-686
boot

title		Ubuntu, kernel 2.6.15-26-686
root		(hd1,0)
kernel		/boot/vmlinuz-2.6.15-26-686 root=/dev/hdb1 ro quiet splash
initrd		/boot/initrd.img-2.6.15-26-686
savedefault
boot

title		Ubuntu, kernel 2.6.15-26-686 (recovery mode)
root		(hd1,0)
kernel		/boot/vmlinuz-2.6.15-26-686 root=/dev/hdb1 ro single
initrd		/boot/initrd.img-2.6.15-26-686
boot

title		Ubuntu, memtest86+
root		(hd1,0)
kernel		/boot/memtest86+.bin 
boot

### END DEBIAN AUTOMAGIC KERNELS LIST

# This is a divider, added to separate the menu items below from the Debian
# ones.
title		Other operating systems:
root


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/hda1
title		Windows NT/2000/XP (loader)
root		(hd0,0)
savedefault
makeactive
chainloader	+1

I have chainloaded Elive's bootloader in this way and it works fine.

 

In the SUSE menu.lst, try changing the menu entry to:

Code:

title         Ubuntu
root          (hdx,x)
makeactive
chainloader   +1