This is a question received by Intel Software Network Support, along with a response supplied by the author of the article being discussed:
Q. I read Venkatesh Pallipadi's article Enhanced Intel SpeedStep Technology and Demand-Based Switching on Linux*. How do I set this technology in theBIOS?
A. The author responds:
First you need to make sure your processor supports Enhanced Intel SpeedStep Technology. You can do that by looking at the'cat /proc/cpuinfo' output and looking for "est" in flags.
Then you need to make sure your BIOS supports EIST. Make sure you have the latest BIOS for your platform. Then check whether thereis an option in BIOS that says "EIST" or "Enhanced SpeedStep" or something similar to that, and enable it in theBIOS. Some BIOSes have explicit options, and some other BIOSes enable the feature by default.
With that, you should see EIST working with anyof the latest Linux distributions.
If you have aprocessor withthe Enhanced Speedstep feature and SpeedStepTechnology is stillnot working in Linux, please open a bug entry in http//:bugme.osdl.org giving details of the issue, under ACPI category in Bugzilla. One of the engineers from our Linux team will help on closing the issue.