Review your favorite Linux distribution.
Go Back > Forums > Linux Forums > Linux - Newbie
User Name
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!


  Search this Thread
Old 01-14-2007, 06:39 AM   #1
Registered: Jan 2006
Posts: 58

Rep: Reputation: 15
Unhappy CPU Frequency Scaling in Arch Linux

Dear friends
I need some help with CPU frequency scaling in Arch Linux. I have installed Arch Linux on my HP Pavilion 64 bit laptop by carefully following their wiki and I am quite happy with it. I also triple boot with Ubuntu Feisty and Suse 10.2. I noticed recently that the applet for CPU Frequency Scaling applet in the arch linux installation (I am using Gnome) frequently fluctuates from the minimum to maximum. (800MHZ-2200MHZ) I am using 'ON DEMAND' as my CPU frequency scaling governor and I have taken care to follow their wiki correctly. I have checked this more than once.

In my Ubuntu and Suse installations where CPU frequency scaling is already set up, the frequency does not seem to fluctuate as often for normal, everyday tasks. It is more steady at 800 MHZ. Once again, I am using 'ON DEMAND' The Arch Linux install does not seem to be overheating my CPU from what I can tell in spite of fluctuating often in its frequency. I am not sure what is happening, why it fluctuates more often than the other installations. When I point my cursor to the applet, it sometimes says 'ON DEMAND' which is the governor that I am using but when it goes towards to the higher frequencies it indicates that I am using other governors such as 'PERFORMANCE'.

Is this problem something to do with the applet itself, that it is not correctly reflecting the settings that I set up using the command line? Or is it something that can eventually affect the performance of the CPU and the laptop itself?

Thanks to anybody who can offer some suggestions!
Old 01-15-2007, 04:18 AM   #2
Senior Member
Registered: Dec 2005
Location: Finland
Distribution: Slackware, CentOS, RHEL, OpenBSD
Posts: 1,006

Rep: Reputation: 37
IIRC the ondemand governor increases the frequency to maximum when the load increases and after task is completed reduces the frequency to minimum.
If you want to increase it slowly step by step you should use the conservative governor.
Old 01-17-2007, 04:55 PM   #3
Registered: Jan 2006
Posts: 58

Original Poster
Rep: Reputation: 15
CPU Frequency Scaling in Arch Linux

Hi there
Thanks for your response. I do understand that part. However, my question is whether it is possible that the settings for CPU Frequency Scaling in Arch Linux, in my installation are somehow arbitrarily going to performance mode even in everyday tasks? I have adjusted the settings using the command line to reflect Powersave, On Demand and conservative. It does not seem to make much difference. It does sit on 800 MHZ at first but then seems to easily reach 2200 MHZ even in everyday tasks, unlike my Ubuntu and Suse installations which do not fluctuate from the base frequency of 800 MHZ during everyday tasks.

Thanks again for any suggestion that you may offer.


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
CPU Frequency Scaling runa Linux - Hardware 5 04-24-2011 11:23 AM
P4 and CPU Frequency scaling tkalfaoglu Linux - Kernel 3 05-31-2006 09:56 AM
CPU frequency-scaling cccc Linux - Hardware 1 03-22-2006 12:13 AM
cpu frequency scaling....anyone? alaios Linux - General 3 06-07-2005 10:51 AM
CPU frequency scaling on Pentium M Khang Linux - Laptop and Netbook 2 03-23-2005 06:16 PM > Forums > Linux Forums > Linux - Newbie

All times are GMT -5. The time now is 07:53 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration