In Gnome 2 there was panel applet that one could use to do that, however in Lubuntu there isn't one, how can i adjust it then?.
Preferably with a simple method, don't really want to directly edit any system file.
The is a lightweight script available.
Download and save with the filename "cpufreq.sh".
Now install zenity
Give the script execute permissions
When you want to change cpu-frequency run
This is how Lubuntu/LXDE should work... however its been broken since 11.04. Hopefully in the near future this problem is resolved and this comment can be deleted
Right-click the panel and choose...
Click the Add button...
Add CPUFreq - this will add an icon to your desktop to change CPU frequency
Note - I dont have a PC that has scalable CPU frequencies to test this applet... let me know if it works for you