"Anyway the real problem (maybe needing fixing) is that in manually editing partitions there's no obvious way to create an Apple_bootstrap partition."
Yes, I came across this too - it's listed as a bug the Ubuntu graphical installer bug wiki. You can either use mac-fdisk to create a boot partition (and the installer will write to this at the end despite saying it can't see the partition at the start) or use the text installer. Back to this bug, though: I managed to compile the 2.6.17.11 kernel in Dapper using the g5_defconfig setting by halting X Windows from loading and playing in the terminal. Incredibly, I have a working (and very fast) Dapper, just minus the sound. This includes fan control. I'm having a play right now to see if I can get the sound going. -- iMac G5 will freeze after booting up https://launchpad.net/bugs/23445 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs