Re: Select voltage manually in cpufreq

Pavel Machek
2003-02-18T22:06:12Z

Hi!

> > Well, and does slow-low-power mean 300MHz, 1.4V as bios said, or
> > 300MHz, 1.2V which is probably also safe?
>
> I have no idea... that's the point... the user almost never knows what
> *exact* magic values are required, they just want fast-on-power or
> slow-on-battery sort of thing.

Well, but system also does not know. And *I* need a way to tell my
system what the right thing is.

> > What about
> > "as-fast-as-possible-but-not-exceed-140MHz-because-batteries-are-
> > running-low-and-can-not-give-enough-current"? That's different from
> > "fast-high-power", but it is *also* different from
> > "slow-low-power". [This actually matters on beasts like
> > zaurus]. What about
> > "as-low-power-as-possible-but-make-sure-you-can-keep-display-up"?
> > [On some machines cpu must be > some HMz for display to still work].
>
> this just shows how silly these complex schemes are
>
> you pick two options, a slow and fast option; both should work

Well, but this simple user interface means pretty complicated
insides.
Pavel

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