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In order to save power and to cool down my Debian system a little bit, I installed cpufregs the other day and changed it the cpu gonever to on_demand. Well ...
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  1. #1
    Just Joined!
    Join Date
    Apr 2009
    Posts
    18

    Debian CPU scaling not working


    In order to save power and to cool down my Debian system a little bit, I installed cpufregs the other day and changed it the cpu gonever to on_demand.

    Well I came back to the box today and powertop tells me that the cpu has been running at 2.66ghz (max freq) for 99/99% of the time.

    Running cpufreq says this:
    Code:
    analyzing CPU 0:
      driver: p4-clockmod
      CPUs which need to switch frequency at the same time: 1
      hardware limits: 333 MHz - 2.67 GHz
      available frequency steps: 333 MHz, 667 MHz, 1000 MHz, 1.33 GHz, 1.67 GHz, 2.00 GHz, 2.33 GHz, 2.67 GHz
      available cpufreq governors: ondemand, userspace, conservative, powersave, performance
      current policy: frequency should be within 2.67 GHz and 2.67 GHz.
                      The governor "ondemand" may decide which speed to use
                      within this range.
      current CPU frequency is 2.67 GHz.
      cpufreq stats: 333 MHz:0.01%, 667 MHz:0.00%, 1000 MHz:0.00%, 1.33 GHz:0.00%, 1.67 GHz:0.00%, 2.00 GHz:0.00%, 2.33 GHz:0.00%, 2.67 GHz:99.98%  (3)
    For some reason or another the computer decided that the freq needs to say bewteen the max and the max , and I have no idea how to change it so that it will scale down to 333MHz.

    Any ideas?

  2. #2
    Just Joined!
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    Jul 2010
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    1
    Have you tried to use conservative instead?

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