Video Problems with 2.3

[Dylan Hand]

I really want to run Yellow Dog Linux, but this i'm getting pretty mad 
right now. here's the story:
Specs:
iBook 800MHz
Radeon Mobility 7500 AGP
Yellow Dog Linux 2.3

Here we go:
When i try to install Linux from the CD, i have to use the 
"install-text-safe" modifier (i guess that means Text install with no 
video driver) or else I get a black screen. So then I finish installing 
and have to run linux with the "-novideo" modifier or else I get the 
same problem as before. The only way I can start the X server is by 
running it in 8-Bit mode using the "fbdev" driver. If I use the "ati" 
driver or "radeon" (even if it's on 8-bit) the video gets all screwed 
up. It looks like a it would be a refresh rate problem if it was a CRT 
monitor. I think XFree86 4.2.1 would fix this problem because it says 
that it has support for Radeons, however I can not find a PPC binary of 
it anywhere and I have no idea how to build one from the source code. 
Any help is appreciated, TIA