Frequency scaling not working

Mikkel L. Ellertson mikkel at
Thu Nov 22 16:53:21 UTC 2007

Ryan Campbell wrote:
> As an update, I came across the program cpufreq-info and it gives me
> this output:
> "# cpufreq-info
> cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006
> Report errors and bugs to linux at, please.
> analyzing CPU 0:
>  driver: acpi-cpufreq
>  CPUs which need to switch frequency at the same time: 0 1
>  hardware limits: 800 MHz - 2.00 GHz
>  available frequency steps: 2.00 GHz, 2.00 GHz, 1.60 GHz, 1.20 GHz, 800 MHz
>  available cpufreq governors: ondemand, userspace, performance
> * current policy: frequency should be within 800 MHz and 800 MHz.*
>                  The governor "ondemand" may decide which speed to use
>                  within this range.
>  current CPU frequency is 800 MHz (asserted by call to hardware)."
> This is repeated for CPU1.
> It looks like the problem is the line,  "current policy: frequency
> should be within 800 MHz and 800 MHz.". That doesn't make any sense.
> Is there any way to manually change the 'current policy'?
My memory is not working today - did you check the settings in
/etc/sysconfig/cpuspeed? The other thing to keep in mind is that
there is more then one way of controlling the CPU speed. Some CPUs
support 1 of the 2, some both. (And some don't support it at all.)


  Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!

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