[Bug 36014] Re: kernel can't scale cpu frequency

[Constantine Evans]

I've further narrowed this down to the cpufreq_verify_within_limits call
inside acpi_processor_ppc_notifier in acpi/processor_perflib.c. I'm not
quite sure why the maximum value gets set to the minimum value, but my
guess is that for some reason, ppc is getting set to the lowest
frequency state instead of the highest frequency state. I've stuffed
some printk's in the code and will try to see if this is the problem the
next time I reboot.

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kernel can't scale cpu frequency
https://launchpad.net/bugs/36014