yaboot problem? OS won't load after install on a Power Mac G5

[ilko Iliev <ilko@gyuvetch.bg>]

hello,

I tried several times installing Debian on a Power Mac G5 machine, each time I go through the install process without any issues, but once I reboot after the install the system hangs in a perpetual "Loading second stage bootstrap..."
I suspect it might be a yaboot issue, I mounted the HDD on another machine and here is the yaboot.conf:
_______________________________________________________________________________________________________
## yaboot.conf generated by debian-installer
##
## run: "man yaboot.conf" for details. Do not make changes until you have!!
## see also: /usr/share/doc/yaboot/examples for example configurations.
##
## For a dual-boot menu, add one or more of:
## bsd=/dev/hdaX, macos=dev/hdaY, macosx=/dev/hdaZ

boot="/dev/disk/by-id/ata-TOSHIBA_MK3261GSYN_924UT7K7T-part2"
device=/ht@0,f2000000/pci@5/k2-sata-root@c/@ffffffffffffffff/@0
partition=3
root="UUID=4653ed6c-9e7b-470c-be87-9418095f8a84"
timeout=50
install=/usr/lib/yaboot/yaboot
magicboot=/usr/lib/yaboot/ofboot
enablecdboot

image=/boot/vmlinux
        label=Linux
        read-only
        initrd=/boot/initrd.img


image=/boot/vmlinux.old
        label=old
        read-only
        initrd=/boot/initrd.img.old
_______________________________________________________________________________________________________

I've also tried replacing the values for the "boot=..." and "root=..." parameters with boot=/dev/sda2 and root=/dev/sda3 respectively but that didn't help. 

Any help will be appreciated!