Speedstep Support via boot parameter doesn't work ?

Peter Boy pboy at barkhof.uni-bremen.de
Wed Nov 19 09:12:45 UTC 2003

Fedora has build in support for speedstep technology. Very nice.

The release notes state:

It is also possible to set minimum, maximum, and policy using the
following boot-time parameter:


I modified my grub.conf as follows:
title Fedora Core (2.4.22-1.2115.nptl) TEST
        root (hd0,2)
        kernel /vmlinuz-2.4.22-1.2115.nptl ro  root=/dev/Volume00/Fedora
hdc=ide-scsi cpufreq=600000:1200000:powersave rhgb
        initrd /initrd-2.4.22-1.2115.nptl.img

After booting /proc/cpufreq is empty and lsmod doesn't show
speedstep-centrino. Obviously the boot parameter does not load the
necessary module. Do I miss something? Is it a bug and worth a bug

The only way I found to make it work is to add the necessary commands to


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