I dug an old Mac PowerPC g5 out of my garage, and the MacOS install on it appears to be trashed.
It can boot into OF Diagnostics, and I can get into the OF Console (egads, what an alien world!).
I've tried booting from a USB stick with Ubuntu server on it, with no luck.
I've since determined that openfirmware doesn't seem to like any of my USB sticks as bootable media, and switched to CDs.
I've verified the checksum for the downloaded image as well as the burned CD, and just to verify that I'm not crazy, reburned a different distro (debian) to another CD and confirmed the checksums.
Every time I try to boot from CD, I follow these steps:
Power on Hold 'C' Key until system begins booting from the optical drive. Wait for bootloader to load
Then, I get the yaboot prompt, and seemingly no matter what options I pass to it, I get this response:
quickly loads Elf64 kernel, then white framebuffered screen showing
done found display : /pci@0,f0000000/NVDA,Parent@10/NVDA,Display-A@0, opening... done copying OF device tree.... Building dt strings.... Building dt structure... Device tree strings 0x0000blahblah Device tree struct 0x0000blahblah Calling quiesce... _
then it hangs. It slowly spools all the fans up to full speed (holy crap, this thing sounds like a small plane taking off!) But goes no further in the install/boot process.
I can repeat this hang with every bootable linux cd I've tried. Ubuntu Server, Ubuntu LiveCD, Debian, etc etc.
I've tried passing it "video=ofonly" "vga=XXXX" (different options all make no difference) acpi switches to turn off, limit to the basics for install, etc. Nothing I try seems to help.
What am I missing? Am I being impatient, should Quiesce take a long time to complete?
Sincerely, Pulling my hair out arguing with a ton of aluminum that sounds like a fighter jet.