Regarding my problem with nonworking brightness controls on a 2400, a
couple of people wrote me very promptly and said they had no problems
with that under 9.1. After further investigation, it seems to be
something that LinuxPPC is doing. Probably the "pmud" daemon (which
handles power management - sleeping etc) is messing up the running
PMU code so that it no longer recognises the buttons. I missed this
because I somewhat surprisingly hadn't cold-booted the machine in
over a week (I had warm-booted between the Mac OS and Linux lots of
times, but never actually shut down completely). Turning it off and
back on fixed the brightness controls. Interestingly, even a
warm-boot with command-PR (to zap the PRAM) didn't have the same
effect, so we can assume the running Power Management Unit chip
always retains state until the power is actually shut off (after
which it only retains a copy of the code it runs in its NVRAM).
Thanks for the replies, though - I figured someone would have
mentioned it if it were really something 9.1 broke, but on the other
hand it wouldn't be the first time Apple had done something like
that. Now I can see about fixing pmud or the kernel PMU support so it
doesn't do this anymore (not that it's by any means bad - the PMU
support certainly works a lot better with LinuxPPC than I've ever
managed on any notebook running Linux x86 with APM).
--
Marc Sira | [EMAIL PROTECTED]
"If you can't play with words, what good are they?"
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