Xorg 7.0 RC0 on powerbook yields garbled text

[Dave Airlie]

> 
> This is due to r300, adding the following option in you card device
> section should fix what you see :
> Option      "XaaNoScanlineImageWriteRect"
> Option      "XaaNoScanlineCPUToScreenColorExpandFill"
> 

it might be worth a PPC head cooking up a patch to not switch these on
at all for now..

Dave.