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#1 2005-04-11 06:21:27

jaawood
Member
From: Chicago, IL
Registered: 2005-01-30
Posts: 31
Website

guide to pentium Ms

Hi, I recently put Arch on my Dell Inspiron 8600, and I was wondering if anyone had come across or writen any guides to getting the cpu frequency scaling to work reliably.  I am not concerned with acpi, but on getting my computer to scale back to 600 mhz from 1.5 ghz when I switch to batter power. 

Thanks for your help.


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#2 2005-04-11 06:28:51

phrakture
Arch Overlord
From: behind you
Registered: 2003-10-29
Posts: 7,879
Website

Re: guide to pentium Ms

it's not really all that difficult - make sure you use the right scaling module (p4_clockmod works for me... it might work for you too)... then you can grab something like cpudyn or cpufreqd and just configure that as per the man pages... I use cpudyn myself

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#3 2005-04-11 10:09:51

LB06
Member
From: The Netherlands
Registered: 2003-10-29
Posts: 435

Re: guide to pentium Ms

Or you just modprobe governor_ondemand and echo ondemand to /sys/devices/system/cpu/cpu0/scaling_governor. It's a much easier and cleaner way to get dynamic scaling working imo.

I don't have my laptop with me, so I am not sure about the module name and pathname.

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#4 2005-04-11 11:31:45

iphitus
Forum Fellow
From: Melbourne, Australia
Registered: 2004-10-09
Posts: 4,927

Re: guide to pentium Ms

I use cpufreqd to automatically scale for me.

On the Arch kernel you have to modprobe a module, but im not sure what module it is -- i compile everything in.

Theres a special one for centrino/pentiumm based computers. i *think * it's speedstep-centrino

iphitus

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#5 2005-04-11 15:42:53

phrakture
Arch Overlord
From: behind you
Registered: 2003-10-29
Posts: 7,879
Website

Re: guide to pentium Ms

iphitus wrote:

i *think * it's speedstep-centrino

yeah, that's it

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#6 2005-06-20 11:43:41

Ecco
Member
Registered: 2005-01-23
Posts: 13

Re: guide to pentium Ms

LB06 wrote:

Or you just modprobe governor_ondemand and echo ondemand to /sys/devices/system/cpu/cpu0/scaling_governor. It's a much easier and cleaner way to get dynamic scaling working imo.

I don't have my laptop with me, so I am not sure about the module name and pathname.

I second this; no need for deamons doing the stepping for you this way. It works like a charm.
I use ondemand when it's on AC and powersave when it switches to battery.

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#7 2005-06-20 12:30:24

CyberTron
Member
From: Gotland ,Sweden
Registered: 2005-03-17
Posts: 645
Website

Re: guide to pentium Ms

you can also use powernowd (which is a daemon that doesn't need any configs and is very lightweight)

it is in the aur


http://www.linuxportalen.com  -> Linux Help portal for Linux and ArchLinux (in swedish)

Dell Inspiron 8500
Kernel 2.6.14-archck1  (selfcompiled)
Enlightenment 17

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#8 2005-06-20 13:16:40

jerem
Member
From: France
Registered: 2005-01-15
Posts: 310

Re: guide to pentium Ms

I have an Inspiron 8600 too.

You need to :

modprobe speedstep_centrino (with a _ and not a - )

I've tried powernowd,cpufreqd,cpudyn and they all work nicely.

To see if it works, don't look at /proc/cpuinfo, but at /sys/blahblah/cpu/cpufreq or something like that.

If you need further information about how to make your laptop model work, just ask.

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