Witht he Flight 5 LiveCD, my iBook 2 Rev. 2 (600MHz 16VRAM) only starts at 640x480 as well. By running "sudo dpkg-reconfigure xserver-xorg" from Terminal (in Gnome) and letting it detecht the hardware go to write a good xorg.conf file. Then I restarted the Xserver with "Ctrl-Opt-Del" and it came back up in 1024x768.
Witht he Flight 5 LiveCD, my iBook 2 Rev. 2 (600MHz 16VRAM) only starts at 640x480 as well. By running "sudo dpkg-reconfigure xserver-xorg" from Terminal (in Gnome) and letting it detecht the hardware go to write a good xorg.conf file. Then I restarted the Xserver with "Ctrl-Opt-Del" and it came back up in 1024x768.
I made a about it and other problems here: http:// ubuntuforums. org/showpost. php?p=867294& postcount= 43