See if this is what you are referring to: HP laptop frequency scalinghttp://linux.derkeiler.com/Mailing-Lists/Ubuntu/2007-12/msg01029.html
It was not for my problem. But also thanks for help me. Maybe my problem is a puzzle. I asked many times in many forum.
It decrease both external frequency and mulitfrequency. I want to know why it works like that? Maybe I should go for some deep technology about CPU works. That 's hard to me.......
Thanks any way. starmas5