Re: Re: Centrino speedstep

Dominik Brodowski
2004-12-29T20:59:05Z

On Wed, Dec 29, 2004 at 08:40:50PM +0100, Ultrakorne wrote:
> Johan Vromans wrote:
> >The acpi-cpufreq driver loads, and the cpufreq tools seem to do
> >something. But do they actually work? E.g. cpufreq-info reports that
> >the limits are 1.6G - 600M, and cpufreq-set accepts 1.6G (confirmed by
> >/proc/cpuinfo) but my CPU is only 1.5G...
> >
> >-- Johan
> >
>
> the same thing happen to my centrino, i have a 1.5g , and acpi-cpufreq
> set min 600 max 1.6G ... i manually echoed a new maximum of 1.5 ...
> the scaling seems to work fine, it automatically switch from 600 to 1500

You should fix the DSDT and replace the frequency value of the P0 state with
1500 instead of 1600. Else frequency calculations in the kernel get mixed up
which can cause too short or too long delays.

Dominik

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