Subject: Re: cpu speed on IBM Thinkpad T42
To: None <>
From: Ove Soerensen <>
List: current-users
Date: 11/08/2004 20:00:30

On Mon, Nov 08, 2004 at 07:44:44AM -0700, John R. Shannon wrote:
> > Did you boot it while on battery?  This almost certainly has 'enhanced
> > speedstep' or something, and there is some way (ACPI I think) to
> > adjust the CPU speed.  I believe the default at boot is full if on
> > power and low if on battery, and then the BIOS expects the OS to
> > control this.  Some FreeBSD folks have added support for adjusting the
> > speed after boot depending on the load average:
> >
> >

i have a simple user-space tool that does exactly the same thing for netbsd
available at - it depends on
speedstep support in the kernel though, so you'll need a -current kernel.