FreeBSD 6 on Centrino laptop : how to prolong battery life with cpufreq (like est and estctrl did)

Miles Keaton mileskeaton at
Sun Nov 13 00:38:41 GMT 2005

> Miles Keaton wrote:
> > I'm happily using FreeBSD 6 on a Centrino laptop, but wondering if
> > anyone can explain ("for dummies") how to use the new cpufreq +
> > SpeedStep to throttle-down my CPU usage and extend battery life - the
> > way that sysutils/est and sysutils/estctrl used to do in FreeBSD 5?
On 11/12/05, J. Martin Petersen <jmp.lists at> wrote:
> I'm using powerd, it's working great.

Any advice on usage?  I tried it and got this error:

# powerd -a minimum
powerd: lookup freq: No such file or directory

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