booting 5.2.1 from grub

[Aaron Walker]

On my secondary desktop machine, that I use for testing purposes, I have
it setup to triple-boot Gentoo Linux/FreeBSD/OpenBSD.

I had fbsd 4.9 installed and the following in grub.conf worked:

root (hd0,1,a)
kernel /boot/loader

I just installed 5.2.1 on the same partitions, but it cannot boot with
the above config.  Has something changed between 4.9 => 5.2.1?  What do
I need to change to get it to boot?

Thanks,
Aaron