[ltp] T61 temperature limits

[Owen Heisler]

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On Wed, 2008.04.16, 107, Richard Neill wrote:
> Owen Heisler wrote:
> > I've implemented _passive_ cooling (as little fan usage as possible) us=
ing a=20
> > script and would like to discuss the limits that I am using for the tem=
perature=20
> > sensors.  I am using three limits which I call "warm", "hot", and "very=
hot". =20
> > First, the processor frequency is limited, second the processors are th=
rottled=20
> > too, and last the system is suspended (at least, that's how I have it n=
ow). =20
> > Any temperature less than warm is considered 'cool enough' for full=20
> > performance.
>=20
> May I suggest you add 2 modes, namely "on-lap" and "on-desk" mode.
>=20
> In "laptop" mode, anything higher than about 65 degrees is dangerous to
> the knees of the person on which it rests!  (45 degrees is about max
> comfortable for the bottom of the case - nb you can get a low intensity
> burn over a long period of time).

With the limits I'm using now, the bottom of the case doesn't get too hot t=
o=20
touch.

> Also, bear in mind that running the machine *very* hot will impact HDD
> lifetime, and may cause transient memory errors.

Yes, I know.  But I need numbers!  ;)

> P.S. You might also consider using nice to make CPU-hogging processes
> not use so much power

Increasing the nice value of a process just affects its priority and won't =
make=20
the process use less power.

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