I installed xubuntu 12.10 in a Fujitsu Siemens laptop with Intel Pentium M processor 1.86Ghz. I noticed that the processor's frequency that the "System information" mentions is only 800Mhz (step down frequency). How can I step up the frequency up to the processor's maximum (1.86GHz)?

  • It would likely be stepped up automatically as needed. – mikewhatever Oct 30 '12 at 9:18
  • I see. What i have seen is that it shows some "delay" and this made me think that something keeps the processor from speeding up.Anyway, thank you for your answer. – SteliosSk Oct 30 '12 at 14:52

The default mode for CPU frequency in Ubuntu is Ondemand, with demand the speed goes up, however you can control that either with cpu-freq indicator or Jupiter power applet.


Thank you all for your attention and will to help. It turns out that all I needed to do is to install "cpufrequtils" from the Ubuntu Software Center.


You can see the available CPU frequencies using the following command:

cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_available_frequencies

and you can see the current CPU frequency using:

cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq

So here is an idea, run the following command in one terminal to observe the current CPU frequencies:

watch -n 1 cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq

..and then run some CPU demanding applications and you should see the CPU frequencies ramp up and down as the load changes.

  • watch -n 1 cat : this is nice : p, thanks – 4pie0 Mar 25 '13 at 18:42

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