Arch Linux

Klenje

Member

From: Europe

Registered: 2007-09-12

Posts: 36

Speedstep, cpufreq

Hi, I'm having troubles with speedstep. I have a Centrino 740, single core, max frequency 1.73 Ghz. I've set /etc/rc.d/cpufreq with

# valid suffixes: Hz, kHz (default), MHz, GHz, THz
min_freq="800MHz"
max_freq="1.73GHz"

Using Klaptop for changing frequency, I've got two profiles: ondemand and performance.
The problem is that with both profiles, the max frequency is always 1.3 Ghz, which is the lower step. Why can't I get the maximum frequency?
Thanks

P.S cpufreq-info shows correctly max frequency, but I can't set it

fwojciec

Member

Registered: 2007-05-20

Posts: 1,411

Re: Speedstep, cpufreq

Hi, I'm having troubles with speedstep. I have a Centrino 740, single core, max frequency 1.73 Ghz. I've set /etc/rc.d/cpufreq with

# valid suffixes: Hz, kHz (default), MHz, GHz, THz
min_freq="800MHz"
max_freq="1.73GHz"

Using Klaptop for changing frequency, I've got two profiles: ondemand and performance.
The problem is that with both profiles, the max frequency is always 1.3 Ghz, which is the lower step. Why can't I get the maximum frequency?
Thanks

P.S cpufreq-info shows correctly max frequency, but I can't set it

Try setting the max frequency to "1.74GHz" or even "1.8GHz" - cpufreq should choose the largest possible value that's _less than_ (that's why 1.73 doesn't work) specified max_freq.

Last edited by fwojciec (2007-09-17 23:25:11)

brain0

Developer

From: Aachen - Germany

Registered: 2005-01-03

Posts: 1,382

Re: Speedstep, cpufreq

Just don't set min_freq and max_freq at all, those settings are pure nonsense, as the kernel already knows the right settings.

Klenje

Member

From: Europe

Registered: 2007-09-12

Posts: 36

Re: Speedstep, cpufreq

well, setting 1.74 GHz did the trick, and now the max frequency is correct . brain0, that's interesting, I just followed the instructions from a page on ArchWiki, maybe I should correct it

lanrat

Member

From: Poland

Registered: 2003-10-28

Posts: 1,274

Re: Speedstep, cpufreq

I can confirm that. Please, update wiki. You can also add that commenting out both min and max values in /etc/conf.d/cpufreq also works (the kernel sets values automatically).

Last edited by lanrat (2007-09-19 06:52:56)

peets

Member

From: Montreal

Registered: 2007-01-11

Posts: 936

Website

Re: Speedstep, cpufreq

I can confirm that. Please, update wiki. You can also add that commenting out both min and max values in /etc/conf.d/cpufreq also works (the kernel sets values automatically).

Done. It's my first ArchWiki edit!