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Re: How do I enable frequency scaling?

On Thursday 23 February 2006 23:37, Joost Kraaijeveld wrote:
> Hi,
> How do I enable frequency scaling on my AMD opteron, using Gnome?
> I installed acpid and cpufreqd. But cpufreqd will not start saying
> "Cpufreqd won't be started, please enable a CpuFreq driver in your
> kernel". How do I do that?
> Joost
I use the package 'powernowd', I use it from the comand line, some gnome 
app may interface with it . Two other packages:

'cpufrequtils - utilities to deal with the cpufreq Linux kernel feature

This package contains two utilities for inspecting and setting the cpu 
frequency through both the sysfs and
procfs CPUFreq kernel interfaces.'

"libcpufreq0 "- shared library to deal with the cpufreq Linux kernel 
This library provide an unified method to access the CPUFreq kernel 

"powernowd - control cpu speed and voltage using 2.6 kernel interface

This simple client controls CPU speed and voltage using the sysfs 
interface to the CPUFreq driver in v2.6 Linux
kernels.  It does not depend on APM or ACPI, and it doesn't try to do 
anything other than control the CPU.

The name is somewhat misleading, as any CPUfreq capable processor will 
work, not just those from AMD.  However,
it works better on CPUs that support more than two speed steps, like those 
with AMD's PowerNow! or Intel's
Pentium M series.

This daemon is less complicated than cpufreqd or cpudyn, at the cost of 
absolutely depending on a 2.6 kernel
with the userspace governor and sysfs support enabled."

Use the commands cpufreq-set or cpufreq-info to set or check status. There 
are man pages for each.
Greg Madden

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