Messages in this thread | | | Date | Thu, 7 Jul 2005 23:10:33 +0200 | From | Dominik Brodowski <> | Subject | Re: enhanced intel speedstep feature was Re: speedstep-centrino on dothan |
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On Thu, Jul 07, 2005 at 10:22:25PM +0200, st3@riseup.net wrote: > > This hasn't been seen to save any power whatsoever that I've seen. > > It drops down power rating by 1500-1800mW on my Toshiba Satellite A50 > while idling at 400MHz.
Do you use ACPI-based idling? If so, in which state is the CPU in (cat /proc/acpi/processor/*/power ? I suspect that you do not use ACPI (else you wouldn't need the table-based approach) or that the ACPI-based idling is broken on your notebook; as then the Linux idle handler only makes use of "hlt" (IIRC), that is ACPI C1, while throttling "forces" ACPI C2 (again IIRC).
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