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Intel Speedstep technology switch

DISCUSSION Tigran Aivazian 3 participants 3 messages Apr 21, 2002 1 message not in the archive

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Tigran Aivazian

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Hi Michal,

I don't think it does but I think Arjan was working in the area related to what you are asking. I cc'd him and the "whole world, or what is left of it" -- maybe they know.

Regards,
Tigran

Quoted 12 lines · Michal Semler

Hello Tigran,
I want to ask u, if linux kernel 2.4.18 supports switching speed of CPU using Intel Speedstep Technology. My computer starts with low speed and switch makes OS not BIOS :( In Windows it switch to fast speed, but in linux I cant work on fast speed.

Is there a possibility to switch my CPU to fast speed?

Thanks

Michal

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Quoted 5 lines · Tigran Aivazian

Hi Michal,

I don't think it does but I think Arjan was working in the area related to what you are asking. I cc'd him and the "whole world, or what is left of it" -- maybe they know.

We're getting close. Right now AMD K6+, K7 PowerNOW
(AMD speak for Speedstep) is supported, as well as Cyrix cpus. Intel is lagging a bit due to Intel not giving
specs; but the reverse engineering is making progress on this part.

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Quoted 4 lines · Arjan van de Ven

We're getting close. Right now AMD K6+, K7 PowerNOW
(AMD speak for Speedstep) is supported, as well as Cyrix cpus. Intel is lagging a bit due to Intel not giving
specs; but the reverse engineering is making progress on this part.

Yup, Dominik Brodowski has done quite a bit of work recently, and is 'almost there' with the newer style of speedstep. (The one used in ICH chipsets), the older BX chipset style of speedstep still needs some thinking.

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