powernow regression in 8-STABLE

Callum Gibson callumgibson at optusnet.com.au
Tue Jul 19 13:32:02 UTC 2011

I've just noticed and tracked down a regression in x86/cpufreq/powernow.c
(on amd64) which was first mentioned here:


although no followup seems to have occurred.

Symptoms are that powerd stops working because the dev.cpu.0.freq OID
is no longer gettable nor settable.

This seems to have been caused by the following revision:
which was in turn an MFC of r221102, so I guess the problem exists on
-current as well, although I can't confirm that since I don't run it.

Reverting the change fixes the problem and powerd will work again. Also
other utilities, such as xacpim, work properly.

I'm running a ML-40 Turion laptop (HP Compaq nx6125).



Callum Gibson @ home

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