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)?
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:
and you can see the current CPU frequency using:
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.