I defined my Ubuntu part ion as ext3 so that all my pups would see it. Works now fine once the new GRUB2 was conquered. See other thread on this forum:benali72 wrote:About Ubuntu dual-booting and grub....
I just define the Ubuntu install partition as ext2. The pop-up panel Ubuntu gives you when defining partitions allows you to create the Ubuntu partition as any of several filesystems (eg: ext2, ext3, ext4, rfs).
If you pick ext2 for the Ubuntu partition, you have no problem using Puppy's grub to boot into it.
I did this for Ubuntu 8.04 and 9.04 and it worked fine. I haven't tried 9.10 yet but unless they changed the Ubuntu pop-up's it should work just like before.
http://www.murga-linux.com/puppy/viewtopic.php?t=45961
Rgds Mike
EeePC901 (with 2 SSDs)