[Bug 422858] Re: Atom N280 frequency scaling not supported

[rkagan]

yes CPU really works at 1.33GHz.

What happens is this:

the operating system tries to save power by decreasing the processor
clock rate. For that, it determines which clock rates are available, and
selects the most appropriate one for the current load, according to the
policy chosen by the user.

The most conventional way of controlling the cpu frequency is through
ACPI.  Apparently in our machines ACPI reports the max available
frequency of 1.33GHz, and, when the cpuspeed control is activated, it
can't go beyond the max.  Note that you're free not use CPU frequency
adjustments, in which case you'll have your 1.66 back, at the price of
shorter battery life.

Windows can ignore the limit, or apply quirks, or not do any CPU
frequency adjustments at all.  What does powercfg /query report on your
system?

-- 
Atom N280 frequency scaling not supported
https://bugs.launchpad.net/bugs/422858
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