powerpc: /proc is empty, yaboot can't install bootloader

[Mitsch]

Tried the new oneiric-desktop-powerpc.iso (and checked the md5sum before :) ). Went fine while booting but I got an error while installing Ubuntu:
"An error has been detected while trying to use the specified Ubuntu archive mirror.[…]
Please check the specified mirror or try a different one"
I chrooted in /target, added a mirror in a self-created sources.list and made an "apt-get update". After this - back on Unity - I pressed the o.k. -buttom from the error-window above and got a "Installation complete"-window. I tried to reboot and failed.

Another turn: (After chrooting in /target) I checked if there was a feasable yaboot.conf in /etc, but there wasn't. Tried yabootconfig from console: "This utility requires the /proc filesystem"

?!?

#: mount
[…]
proc on /proc type proc (rw,relatime)
[…]

#: ls /proc
[nothing]

Don't know, if the error-message about the mirror has got sth to do with the missing proc-fs, but I guess the installation could be finished even if there wasn't a working mirror reachable, but if there was sth in the /proc directory.

Sad: Unity looks promising and fast enough for my PowerMac G4… Hope, you get it fixed, soon!

If you got questions about my report: ask! :)

Greets!