Re: Centrino speedstep

Johan Vromans
2004-12-29T20:05:16Z

Bruno Ducrot <ducrot-kk6yZipjEM5g9hUCZPvPmw@public.gmane.org> writes:

> After looking the DSDT, this laptop do not support the _PDC switch, so
> the cpufreq-centrino driver will not work. But it should work with the
> acpi io driver though.

This seems to be the case.

> Interresting portion:
> [...]
>
> This also mean there is no way to get the ondemand governor (or any
> DVS requiring low latency driver) to work with this one

What exactly does that mean?

> (unless hardcoding a table in the cpufreq-centrino).

Would that be difficult to accomplish?

> There is no _CST also, this means there is no C4 support :(

Nope. I'll have to do with C3...

BTW: To be able to compile my DSDT I needed some fixes, mostly
trivial, except one: the final return value of Method(_STA) from
Device(BAY1), around line 3222. Do you have any idea?

Thanks for helping,

Johan

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