Booting FC4 after Mac OS X Update, yaboot gone?

[shrubbery]

Alright, I had both Mac OS X (10.4) and Fedora Core 4 coexisting happily, but all of a sudden my system doesn't ask what I want to boot into, it just boots Mac OS X without asking. It's almost as though the boot loader is gone, replaced with Mac OS's.

The only thing that I can think of, is I was updating Mac OS X (since I got both installed first, and then proceeded with the updates), and an update overwrote the bootloader.

Is this normal or known to happen? How can I get my dual boot back? Any help would be greatly appreciated.

Thanks,
-Creighton

[multescugeorge@]

You had the grub boot loader?
If so, boot with fedora cd 1
type:
linux rescue
at the boot: prompt
folow the steps, at the last step(if there are no errors) do:
chroot /mnt/sysimage
then:
grub-install --recheck /dev/hda
where /dev/hda is the primary master HDD. (could be /dev/hdd, /dev/hdc, /dev/hdd)

[Spoon!]

You had the grub boot loader?
If so, boot with fedora cd 1
type:
linux rescue
at the boot: prompt
folow the steps, at the last step(if there are no errors) do:
chroot /mnt/sysimage
then:
grub-install --recheck /dev/hda
where /dev/hda is the primary master HDD. (could be /dev/hdd, /dev/hdc, /dev/hdd)
No, this is PPC. They have "yaboot" bootloader and who-knows-what hard drive device names. But trying to start rescue mode still sounds like a good idea.

[multescugeorge@]

No, this is PPC. They have "yaboot" bootloader and who-knows-what hard drive device names.
My mistake.
While in rescue mode, after chroot /mnt/sysimage do a:
less /boot/grub/grub.conf
watch for the entry:
#boot=/dev/Who_knows
(just remember what comes after the "=")
then do:
grub-install --recheck /dev/who_knows
Hope it works.

[Spoon!]

:mad: This is PPC. They don't use GRUB; they use yaboot. Anyway, I found this tutorial on using yaboot:
http://penguinppc.org/bootloaders/yaboot/doc/yaboot-howto.shtml
It seems that you should try to run the "ybin" program to rewrite the bootloader or something.

[Rizz]

Go into rescuemode and edit /etc/yaboot.conf Then run yabootconfig -r /dev/"yourlinuxroot" -b /dev/"yourapplebootstrap".
Now enter the path to the kernelimage.

[shrubbery]

I greatly appreciate all your responses, but the answer turned out to be much more simple than it seemed. Apparently, the Software Update reset the Startup Drive, so holding down option at startup allowed me to boot from the linux drive. Ever since I did that once, everything has returned to normal.

Thanks!