Video output is stopped on Ubuntu 5.10 (breezy) and Mac mini after kernel loads

[Eric Dunbar]

Hi all, I've got a bit of a funny problem (and thought I'd rename the thread).

I installed Ubuntu 5.10 (breezy) onto my Mac mini (512 MB RAM, 40 GB
HD (5.2 GB Ubuntu, 35 GB Mac OS X), 1.25 GHz G4, _no_ additional
hardware).

The install process went fine. When the computer reboots I get the
normal two yaboot-related menus. Up to this point, no problems. When
Ubuntu continues booting past this point I get some text (which I'll
paste below) and then the screen goes to sleep (i.e. no signal coming
from the video card) and STAYS asleep.

Ubuntu apparently boots normally, because I can cause it to shutdown
(halt) or reboot by typing "blindly" (ctrl-alt-F1 followed by
username, password... wait a second then enter 'sudo halt' followed by
the password for sudo at which point the computer beeps angrily and
promptly restarts/shuts down).

How can I get video working? Do I need to reinstall or can I modify
yaboot using the live CD?

Anyone run into this problem on the Mac mini?

Thanks, Eric.

FYI Here's what's displayed on my screen before it goes "down for the count":

I'm running yaboot 1.313

device=/pci at f4000000/ata-6 at d/disk at 0

partition=3

After allowing yaboot to load the kernel this is what appears (a white
screen with text flashes but it passes by too fast for me to capture):

Welcome to Linux, kernel 2.6.12-9-powerpc

linked at:          0xc0000000
frame buffer at  :0x9c008000  (phys), 0xd0008000  (log)
klimit:               0xc0320b20
MSR:                0x00003030
HID0:                0x8418c0bc

pmac_init(): exit
id_mach(): done
MMU:enter
MMU:hw init
hash:enter
hash:find piece
hash:patch
hash:done
MMU:mapin
MMU:setio
MMU:exit
setup_arch: enter
setup_arch: bootmem
arch: exit
openpic: enter
openpic: timer
openpic: external
openpic: spurious
openpic: exit