[gentoo-ppc-user] Re: OT: thermal management on tibook

[gentoo-ppc-user] Re: OT: thermal management on tibook

[Alexander Meyer]

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hi list,

some time ago i asked about differences in thermal-management between
2.4 series kernels and 2.6 series kernels, since with a 2.6 kernel the
tibook seems to get a lot hotter than with a 2.4 kernel.

i then tried some older 2.6 kernels because i was told that the change
was made somewhere in the early 2.6 releases and not at the switch from
2.4 to 2.6. but even with the earliest 2.6 kernels the system still gets
very hot and the fan will run continuously.

i then booted macos (10.3.4 IIRC) and to my great dissapointment the
system stayed cool and the fan would only start running if the system
actually had something to do (like opening a so called "popunder" ad
with lots of bells and whistles in firefox).

this shows that there _is_ a way of keeping the system cool, even if it
is one of those rotten tibooks. but i don't want to use macos. or in
other words i just can't stand it (from my usability point of view it's
even worse than windows, despite the fact that it actually is a real
unix inside, but all that apple-gui-junk makes me puke my guts out).

now the actual question is: why is the thing getting that hot when
running linux? i tried anything from disabling each and every daemon,
shutting down the harddisk, disabling x, and still, even with a load
average of 0.00 and the harddisk turned off, the system's getting damn
hot and the fan would run continuously.

any help is appreciated!

thanks in advance and best regards,

alexander


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Re: [gentoo-ppc-user] Re: OT: thermal management on tibook

[Joseph Jezak]

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Are you running CPU frequency scaling software?  This makes the biggest
difference on my TiBook 500.  By not running at full speed all of the
time, my machine  is cooler and the battery lasts longer.

- -Joe
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Re: [gentoo-ppc-user] Re: OT: thermal management on tibook

[Alexander Meyer]

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On Di, Jul 12 2005 at 07:31:19 -0400, Joseph Jezak wrote:
> Are you running CPU frequency scaling software?  

yes, i do. although frequency scaling is claimed to be not supported on my
model (tibook II 550, aka powerbook3,3 IIRC), i am now able to limit the
frequency to 500 Mhz but with no effect whatsoever. but i'm sure that
macos isn't able to any kind of frequency scaling on this actual model,
so this can't be it.

> This makes the biggest
> difference on my TiBook 500.  By not running at full speed all of the
> time, my machine  is cooler and the battery lasts longer.

i'd love to have this, but the 50MHz off i get with my machine make no
difference at all.

alexander


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