I noticed this issue mentioned previously on this list, but there didn't seem to be any resolution.
The 800MHz tiBook boots linux in 667MHz mode: /proc/device-tree/cpus/PowerPC,G4 min-clock-frequency 0000000: 27c1 9cc0 '... max-clock-frequency 0000000: 2faf 0800 /... clock-frequency 0000000: 27c1 9cc0 '... force-reduced-speed 0000000: 0000 0001 .... I don't know if that last entry is a bitmask, or a state. I imagine that if it's a state, I can just go and reset it in Open Firmware, and everything will be OK, but for laptop users, being able to throttle the CPU speed is really useful. A cursory poke around the PPC 7455 docs on the motorola website seems to indicate that the speed throttling isn't done with an MSR on the CPU. I don't know where to look for good documentation about Open Firmware and Apple hardware (any pointers?). Toby.
