anyone using ubuntu on a Mac TiBook?

[williamd]

I am new to Linux, but am liking ubuntu more and more. The problem is  
i want to install onto a Mac Titanium Powerbook. Apparently the  
graphics card on my 550mhz is incompatible as both ubuntu 9.04 and  
kubuntu 9.04 boot from cd into garbled grayscale lines. I'm wondering  
if a different TiBook model with a different video card might give  
better results. Anyone have experience with this?

Thanks for any suggestions.

-bill