[SOLVED]Dual boot Grub2 : file not found

Question

here is my config :
Ubuntu 11.1 installed on sd1. It is my default system, and where the GRUB2 config is.
I installed Archlinux on sd2, with /boot on (hd1,1) and / on (hd1,2).
I want to set up GRUB to boot both systems.
here is my /etc/grub.d/11_linux_arch, in the Ubuntu system :
#!/bin/sh -e
echo "Adding Archlinux"
cat << EOF
menuentry "ArchLinux"  {
set root=(hd1,2)
linux /boot/vmlinuz-linux
initrd /boot/initramfs-linux.img
EOF
vmlinux-linux and initramfs-linux.img are well in my /boot folder on (hd1,1)
At grub prompt, I can see Archlinux as an option. When I select it, I get an error message, "file not found".
I can't see where is an error.
TY for any help.
Last edited by gabx (2011-11-29 22:41:11)

Answer 1

Here is what I added to /etc/grub.d/40_custom
# Arch Linux
menuentry "Arch Linux" {
set root=(hd1,1)
linux /vmlinuz-linux root=/dev/disk/by-uuid/38616db1-366f-40f4-a728-1230e81abb21 ro
initrd /initramfs-linux.img
I think telling the uuid is better  but /dev/sdb2  (my / partition)  works too.
Then :
#sudo update-grub
and I have been able to dual boot Archlinux and Ubuntu 11.10.
The resolution is bad, so I will add a line about it, but I guess it is not diificult.