I have been successful in installing 9.10 on a G4 Cube using the procedure that follow.
First, download the Alternate CD iso and burn to disk.
Second, elected to install a cli only version by inputting "cli-powerpc" at the yaboot 'boot' prompt (without the quotes, of course).
Third, once installed, and after a restart, sign in and
to get all updates.
sudo aptitude update
sudo aptitude safe-upgrade
Fourth, at the 'terminal prompt' once the updates are installed,
In my xorg.conf file (located in the directory /etc/X11) I put the following information for my system, which has an ATI 128 Rage PF/PRO AGP 4x TMDS video card, and a 15" Apple Studio Monitor (carefully note where quotation marks are and are not used):
cd /etc/X11 #change directory
sudo nano xorg.conf #open a blank file to input correct parameters for system
Then, ^o to write the file, and ^x to exit nano.
Identifier "Configured Video Device"
Option "UseFBDev" "true"
Identifier "Configured Monitor"
Identifier "Default Screen"
Modes "1024x768@60" "800x600@60" "600x480@60"
Monitor "Configured Monitor"
Device "Configured Video Device"
Fifth, at the command line prompt, I input
as I wanted a full fledged Gnome environment, but at this point the user may install the desktop or window manager desired, e.g. icewm, lxde, etc., along with such configuration files needed or desired.
sudo aptitude install ubuntu-desktop
Sixth, once all is installed, cleaned up, etc., then I restart from the command line prompt
Seventh, at the second yaboot prompt (Boot), select the default (which is Linux for a single os system); do not pass the kernel parameter video=ofonly, as on subject system, this causes the display to "go haywire", becoming unusable. This parameter is also not present in the base /etc/yaboot.conf file.
sudo restart now -r
Standard disclaimer: the above works on a G4 Cube, 576 MB RAM, with a 15" Apple Studio Monitor, Rage 128 PF/PRO video card. Different system? Different parameters will be needed for video card, etc.