Post by jamba on Sept 14, 2009 5:44:41 GMT -5
bbs.archlinux.org/viewtopic.php?id=69494
Success! The backup worked, here is what I did (as root):cp -r /lib/modules/2.6.28-ARCH/ /lib/modules/2.6.28-ARCH-old
cp -r /usr/src/linux-2.6.28-ARCH /usr/src/linux-2.6.28-ARCH-old
cp /boot/kernel26.img /boot/kernel26-old.img
cp /boot/kernel26-fallback.img /boot/kernel26-old-fallback.img
cp /boot/vmlinuz26 /boot/vmlinuz26-old
pacman -Syu
....
mv /lib/modules/2.6.28-ARCH-old /lib/modules/2.6.28-ARCH
mv /usr/src/linux-2.6.28-ARCH-old /usr/src/linux-2.6.28-ARCH
vim /boot/grub/menu.lst
to /boot/grub/menu.lst I added the following lines# (0) Arch Linux
title Arch Linux old
root (hd0,0)
kernel /boot/vmlinuz26-old root=/dev/disk/by-uuid/a0e70097-9d86-41b7-94a1-6df9bf6ec5db resume=/dev/disk/by-uuid/6fde335c-aa00-4d4f-a9db-15859aefd4f1 ro vga=773
initrd /boot/kernel26-old.img
# (1) Arch Linux
title Arch Linux Fallback old
root (hd0,0)
kernel /boot/vmlinuz26-old root=/dev/disk/by-uuid/a0e70097-9d86-41b7-94a1-6df9bf6ec5db ro
initrd /boot/kernel26-fallback-old.img
It is important to save the modules directory (which is removed by the upgrade) otherwise the old kernel won't have any module, besides those in the initial image. Also, if one wants to compile external modules for the old kernel, the /usr/src/linux-2.6.28-ARCH needs to be saved.