How to make use of Dynamic Frequency Scaling

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general

Linux supports Dynamic Frequency Scaling for ThinkPads with mobile Pentium III, Pentium 4 and Pentium M processors.

configuring the kernel

2.4 kernels

Todo...

2.6 kernels

Todo..

If you have a Coppermine-piix-smi based Thinkpads like from the A2x, X2x and T2x series you might want to look at this page.

If you have a p4-class celeron based Thinkpad like the R40e you might want to look at this page

Since 2.6.10, there is the ondemand governor in the kernel, which replaces any userspace daemon for cpu scaling and works very well.

configuring SpeedStep daemons