Building cpufreq modules into F16 kernel is it right or wrong?

alekcejk at alekcejk at
Mon Oct 17 19:40:06 UTC 2011

Frequency scaling have negative effects for me
so I need to have it disabled in BIOS.

I think that this is not BIOS option broken
but broken kernel with built-in cpufreq modules.
If hardware supports disabling frequency scaling
then should be possibility to do this.
BIOS have such possibility, Fedora kernels before F16
also makes it possible to use or not to use scaling.
But with F16+ kernels this becomes impossible.

Adam Jackson wrote:

> On Mon, 2011-10-17 at 21:54 +0300, alekcejk at wrote:
>> But this assumption was wrong for my system which have BIOS option
>> for disabling CPU frequency scaling (SpeedStep).
>> If SpeedStep is enabled in BIOS then kernel uses acpi-cpufreq built-in module
>> but if I will disable frequency scaling in BIOS kernel still loads cpufreq module
>> but p4-clockmod instead of acpi-cpufreq.
> Why would you choose broken BIOS options?
> - ajax
Alexey Kurov <nucleo at>

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