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Old 04-10-2004, 10:16 PM   #1
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Registered: Apr 2004
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Proc throttling on Athlon XP-M / Mandrake 10

I am running Mandrake 10 on an eMachines 5312, and don't seem to be able to get processor throttling to work. This machine has an Athlon XP-M 2400+ processor, which I know supports throttling; various WinXP tools do indeed show the processor speed changing with load.

Under Linux this doesn't seem to work. I have "Enable performance profiles" and "Enable processor throttling" checked in the ACPI Config tab of KLaptop; however, /proc/acpi/processor/CPU0/throttling still reports <not supported>, and /proc/acpi/processor/CPU0/info confirms this.

Also, the only "performance profile" available in all the KLaptop options that offer a choice is "0 MHz"... I assume that, in a system with working throttling, there's an option here to select a clock speed.

What seems to be the matter?

Is Athlon XP-M throttling support working in Linux, or does it only work for Centrino/etc?
Old 04-11-2004, 01:08 PM   #2
Registered: Apr 2002
Location: Wales MA.
Distribution: openSuSE 11.1
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Although I can't help you with your problem I can at least answer your last question.

The CPU throttling in my Averatec laptop (XP-M 1700+) works fine in SuSE 9.0. So yes throttling works for AMD processors in linux.
Old 04-17-2004, 05:44 AM   #3
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I am using cpuspeed-1.1 ( under Mandrake to change my CPU speed. My FSC has AMD 1400+ XP-M.
Did u enable the powernow_k7 in kernel? It is compiled as a module by default, so if it's not loaded, the throttling won't work.
Old 08-24-2004, 11:59 PM   #4
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I am running mandrake 10 as well on the 5312 emachines laptop. I was wondering how do get the wireless to work under linux, i cant get it to work under xp pro either. it keeps telling me to enable the radio, even when i click enable radio and hit apply i get the same message. I have the newest drivers for xp as well. Any help is much appreciated!



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