Update on trying to get Adelie installed on a G4 Quicksilver with an Nvidia GeForce4 MX (NV17) GPU and a G5 Cheesegrater with a Radeon 9600 XT GPU: No joy on the G4, I believe all the issues are with getting the OS to deal with the GPU.
G4 attempts include trying to enter commands at boot that include "nouveau.modeset=0" and "video=offb
ff". I have to hit ctrl-F7 to get to the main screen which only displays a flashing white cursor in the upper right hand corner. I have removed the Apple Cinema Display and attached a DVI monitor with no change in results.
G5 stopped at launching the live desktop because it can't find a root file system in "/run/initramfs/live//ppc64". It's now generating a verbose error report and drops to a dracut debug shell. (Note: I had the exact same problem, dropping to a debug shell, trying to load the x86 version onto a Dell Latitude.)
So basically, it's as if every download is bad. Will try a few more tricks to see If I can get something to work.
Also getting blk_update_request: IO error , device sr0 then gives a sector #. I know all of the CD/DVD machines are working in all of my devices, so I suspect a problem with the media.