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

J. Martin Petersen jmp.lists at
Sun Nov 13 13:30:04 GMT 2005

Miles Keaton wrote:
>>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

Have you loaded the cpufreq kernel module. I'm not sure if the man-page
is verbose enough on this issue.

Cheers, Martin

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