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

[rkagan]

On Wed, Dec 02, 2009 at 03:53:50AM -0000, Mehmet Atif Ergun wrote:
> I've got a aod250-1613 (intel n280 + android + xp version) and this
> affects me too. but is it possible that this is about the kernel rather
> than cpufreqd (that's a deamon, right?)?

As can be seen in the discussion above this is neither about cpufreqd
nor the kernel.  It's about BIOS bug.

> I did not install cpufreqd. If I echo ondemand >
> /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor (from arch wiki),
> it freqs down. And, again without modprobing acpi_cpufreq (or after
> modprobing), the max freq shows itself to be 1.33 and not 1.66.

Without acpi-cpufreq loaded you wouldn't have cpufreq subdirectory at
all.  And you *would* have your CPU frequency at 1.66 GHz.

> Can that mean that there is something wrong with how the kernel reads
> its info?

No.  By loading acpi-cpufreq you indicate that you want to control your
CPU's frequency, selecting among the available P-states. The top P-state
reported by the BIOS is 1.33 GHz.  Complain to your BIOS vendor.

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