Comment 4 for bug 36604

Do you have an ICH chipset? If so the driver would be:

  sudo modprobe speedstep-ich

the simple answer is that these coppermine CPUs do not report that they are capable of CPU scaling. If you can work out how to get a module loaded we can special case it to work out of the box (but you need to work out what it is first! :-)

No answers, but Googling turned up:

  http://lists.linuxcoding.com/rhl/2004/msg65300.html