Just correcting my post #8. Of course the radeon card is using a fbdev/radeonfb combination and the nvidia cards (using 'nomodeset') will use a fbdev/offb combination. The openfirmware framebuffer (offb) is seemingly limited to 16 colours so the graphics are even worse. Ubiquity doesn't show anything using fbdev/offb either.
Just correcting my post #8. Of course the radeon card is using a fbdev/radeonfb combination and the nvidia cards (using 'nomodeset') will use a fbdev/offb combination. The openfirmware framebuffer (offb) is seemingly limited to 16 colours so the graphics are even worse. Ubiquity doesn't show anything using fbdev/offb either.
@2blue https:/ /wiki.ubuntu. com/PowerPCFAQ# What_yaboot_ parameters_ should_ I_use_for_ graphics_ problems. 3F