[K12OSN] OT: Slackware + Ubuntu dual boot using lilo

[Robert Arkiletian]

I have Slackware installed like this 

/dev/hda1 mounted as /boot
/dev/hda2 as swap
/dev/hda3 as /

I installed Ubuntu 5.04 in expert mode to /dev/hda4 as /
and hda2 as swap

I did not install lilo or grub during the Ubuntu install.

Rebooted Slack and mounted /dev/hda4 as /mnt/ubuntu then edited
lilo.conf to include another stanza

image = /mnt/ubuntu/boot/vmlinuz-2.6.10-5-386
  root = /dev/hda4
  label = Ubuntu
  read-only

then #lilo

But when I reboot and choose Ubuntu I get the following kernel panic.

===
VFS: Cannot open root device "304" or unknown-block(3,4)
Please append a correct "ROOT= " boot option
Kernel panic -not syncing: vfs: unable to mount root fs on unknown-block(3,4)
===

I tried doing rdev /mnt/ubuntu/boot/vmlinuz-2.6.10-5-386 /dev/hda4
and then #lilo but it did not work.

I can still boot Slackware just fine.
Any help is much appreciated.

-- 
Robert Arkiletian
C++ GUI tutorial http://fltk.org/links.php?V19