Urgh, radeon frame buffer support in 2.5.66-bk12 (that’s cutting edge with some extra blood on top) seems to be completely broken at least on my laptop. After a little searching, it seems these drivers also seem to be in the process of a complete redesign. That’s a shame, as I wanted to try and adapt Benjamin Herrenschmidt and ATI’s 2.4 kernel PowerMac power management and suspend/resume code to x86 ACPI support in 2.5.x.
Fortunately it seems that benh is working on a 2.5 version of his work. I’ll just wait patiently until there’s more news about this bit.