Frequency scaling not working

Kevin J. Cummings cummings at kjchome.homeip.net
Wed Nov 21 23:36:18 UTC 2007


Ryan Campbell wrote:
> I still have not been able to get my frequency scaling working, but
> after some looking around I noticed that
> /proc/acpi/processor/CPU0/throttling says:
> 
> # cat /proc/acpi/processor/CPU0/throttling
> <not supported>

Under Fedora 6 (which my laptop is running), I have the CPU Frequency
Scaling Monitor running in the upper menu bar.  Lately (ie, after a
recent kernel update) its been telling me that my processor frequency
scaling is no longer supported.  Odd because it used to be supported.
I was looking into the applets options, it can monitor CPU0 or CPU1.

Then I went and looked at /proc/acpi/processor and found that it
contained 2 entries:  CPU1 and CPU2

> Is this normal?  It seems odd because I also get this:
> 
> # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
> 2001000 2000000 1600000 1200000 800000

and my /sys/devices/system/cpu conatins cpu0 and cpu1 subdirectories,
neither of which has a cpufreq subdirectory.

> Which makes me think that throttling should be working. I am running out
> of ideas though.

I too am at a loss to explain.

> Ryan

-- 
Kevin J. Cummings
kjchome at rcn.com
cummings at kjchome.homeip.net
cummings at kjc386.framingham.ma.us
Registered Linux User #1232 (http://counter.li.org)




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