Why does my Intel CPU underclock itself automatically?
Background: The CPU Frequency Scaling Monitor from my Ubuntu installation is set to "on demand" per default. This results in quite rapid changes of my CPU clock speed from 800 Mhz to 2.5 GHz. (At least, that's what is displayed.)
So, is it in any way harmful to change the clock speed of the CPU in quick succession?
Hardware info: Lenovo T61 Laptop with a Intel C2D T9300 @ 2.50GHz.
Bonus question :-) Is the actual clock speed really changed?