Can you test this on the Edgy beta and also post the printout of: cat /proc/cpuinfo
This will give us information on your specific model of PowerBook -- radeonfb fails to probe EDID on a PowerBook G4 (TiBook) https://launchpad.net/bugs/60685 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
