This forum has been archived. All content is frozen. Please use KDE Discuss instead.

how to do cpu frequenzy scaling in kde 4.6

Page 1 of 1 (13 posts)

Tags: None
(comma "," separated)
sxe
Registered Member
Posts
65
Karma
0
OS

how to do cpu frequenzy scaling in kde 4.6

Tue Feb 15, 2011 12:42 pm
Hey guys,

a simple question.

What is the right way to do cpu frequenzy scalling in kde 4.6?

Currenty i have added:

modules: acpi-cpufreq, cpufreq_performance, cpufreq_ondemand, cpufreq_powersave

Then i have added this lines to "/etc/rc.local":
echo "ondemand" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo "ondemand" > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
echo "ondemand" > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
echo "ondemand" > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
echo "ondemand" > /sys/devices/system/cpu/cpu4/cpufreq/scaling_governor
echo "ondemand" > /sys/devices/system/cpu/cpu5/cpufreq/scaling_governor
echo "ondemand" > /sys/devices/system/cpu/cpu6/cpufreq/scaling_governor
echo "ondemand" > sys/devices/system/cpu/cpu7/cpufreq/scaling_governor

So the right governor is set after each reboot.

But this way is not the KDE 4.6 way i think cause i don't use KDE to change m cpu speed. So you have any advice how to do it right cause switching the governor is pain in the ****? ;)

Thx
ninjong66
Registered Member
Posts
1
Karma
0
OS

Re: how to do cpu frequenzy scaling in kde 4.6

Tue Feb 15, 2011 1:50 pm
I want to know that too.

Thanks in advance
User avatar
toad
Global Moderator
Posts
1258
Karma
7
OS

Re: how to do cpu frequenzy scaling in kde 4.6

Tue Feb 15, 2011 2:10 pm
Interesting, this is all I've got:

Code: Select all
toad@archtop 513\13 /etc > cat /etc/rc.conf|grep cpu
MODULES=(acpi_cpufreq tp_smapi hdaps)


Haven't touched the KDE thingy and my CPU jumps up and down on demand as advertised (when I tickle its stomach, it dances, too!) :)

Debian testing
User avatar
bcooksley
Administrator
Posts
19765
Karma
87
OS

Re: how to do cpu frequenzy scaling in kde 4.6

Wed Feb 16, 2011 12:15 am
KDE Power Management uses the ondemand governor at all times I believe. What behaviour are you seeing exactly?

KDE Sysadmin
[img]content/bcooksley_sig.png[/img]
sxe
Registered Member
Posts
65
Karma
0
OS

Re: how to do cpu frequenzy scaling in kde 4.6

Wed Feb 16, 2011 9:24 am
Thas interesting

I made a test and tried it with acpi_cpufreq only:

Code: Select all
MODULES=(!nouveau !usblp acpi_cpufreq )


BUt then nothing happens to my cores. They get stuck at the highest frequency.

Code: Select all
watch grep \"cpu MHz\" /proc/cpuinfo


Code: Select all
Every 2.0s: grep "cpu MHz" /proc/cpuinfo                                                                                                                                  Wed Feb 16 10:22:53 2011

cpu MHz         : 1734.000
cpu MHz         : 1734.000
cpu MHz         : 1734.000
cpu MHz         : 1734.000
cpu MHz         : 1734.000
cpu MHz         : 1734.000
cpu MHz         : 1734.000
cpu MHz         : 1734.000


@ bcooksley
Even when removing the module completely the cpus get stuck at max.

*edit: Damn, when using the method described in my first post, my battery is not recognized. :/ So i have no working solution at all.

Last edited by sxe on Wed Feb 16, 2011 9:30 am, edited 1 time in total.
User avatar
toad
Global Moderator
Posts
1258
Karma
7
OS

Re: how to do cpu frequenzy scaling in kde 4.6

Wed Feb 16, 2011 9:30 am
You got laptop mode tools installed?

https://wiki.archlinux.org/index.php/CP ... Mode_Tools

Debian testing
sxe
Registered Member
Posts
65
Karma
0
OS

Re: how to do cpu frequenzy scaling in kde 4.6

Wed Feb 16, 2011 9:32 am
Nop, will try that, thx
User avatar
toad
Global Moderator
Posts
1258
Karma
7
OS

Re: how to do cpu frequenzy scaling in kde 4.6

Wed Feb 16, 2011 9:33 am
Hehe, always read your wiki :)

Debian testing
sxe
Registered Member
Posts
65
Karma
0
OS

Re: how to do cpu frequenzy scaling in kde 4.6

Wed Feb 16, 2011 9:51 am
:)

I saw that already but you said you have no other modules loaded and the wiki says
Add laptop-mode to the DAEMONS array in /etc/rc.conf:
DAEMONS=(...laptop-mode...)


So i'm wondering how that works for you.

Btw, i'm aware of different solutions how to handle it but i want to know how it works the KDE way. ;)
User avatar
toad
Global Moderator
Posts
1258
Karma
7
OS

Re: how to do cpu frequenzy scaling in kde 4.6

Wed Feb 16, 2011 9:52 am
Must be tp_smapi - special thinkpad tools...

Debian testing
sxe
Registered Member
Posts
65
Karma
0
OS

Re: how to do cpu frequenzy scaling in kde 4.6

Wed Feb 16, 2011 10:07 am
ok, cool, loading laptop-mode did the trick but now i have an other problem. KDE cannot recognize my battery anymore.

*edit: sometimes the battery is recognized correctly. Strange
User avatar
bcooksley
Administrator
Posts
19765
Karma
87
OS

Re: how to do cpu frequenzy scaling in kde 4.6

Wed Feb 16, 2011 11:04 pm
KDE 4.6 uses UDev to detect hardware, so make sure it acknowledges the existance of your battery.

KDE Sysadmin
[img]content/bcooksley_sig.png[/img]
sxe
Registered Member
Posts
65
Karma
0
OS

Re: how to do cpu frequenzy scaling in kde 4.6

Thu Feb 17, 2011 7:48 pm
Like i said, it works but only sometimes. :)
Anyway, thx for your advice.

But can someone give me the answer to my initial question?
Is there a possibility to to it the KDE way?

Page 1 of 1 (13 posts)

Bookmarks


Who is online

Registered users: Bing [Bot], Google [Bot], Sogou [Bot], Yahoo [Bot]