Arch Linux

nierro

Member

From: Milan, Italy

Registered: 2011-09-02

Posts: 849

[SOLVED]Kernel 3.1 no cpu frequency scaling?

Hello everyone!
After my kernel upgrade, yesterday, i have to notice that my cpu frequency scaling is no more working...my scaling governor was cpufreq_userspace, managed by granola.
Well before the upgrade, during normal desktop activity, my freq was 1.20 ghz, after the kernel upgrade is 2.10 ghz.
This, added to the power bug (or as you want to call it) is killing my laptop in 2 hours of normal activity. Well in particular, I don't mind about it because I use it as a desktop pc, but I can imagine that lots of people are having problems and the solution seems even more distant.
This problem has already been noticed by an user, on phoronix "I come to find out that the ondemand, powersave and userspace governors (I only tested those) can't get the CPU under 2.6 GHz. cpufreq-info tells me so and the CPU temperatures confirm it. Vcore, temperatures and cpufreq say I'm at 2.6 GHz with Linux 3.1 when I ask for 1.6. Linux 3.0.7 works fine. With Linux 3.1 anything under 2.6 gives me 2.6, 2.6-3.1 GHz speeds work as expected. There is an unpassable floor at 2.6. "(http://www.phoronix.com/scan.php?page=n … px=MTAwNzY)
I have arch x64, with NO testing repo activated.
Thanks for your replies!
Bye!

Last edited by nierro (2011-11-10 11:15:08)

skunktrader

Member

From: Brisbane, Australia

Registered: 2010-02-14

Posts: 1,590

Re: [SOLVED]Kernel 3.1 no cpu frequency scaling?

ondemand is still working fine on my atom n450 with 3.1

nierro

Member

From: Milan, Italy

Registered: 2011-09-02

Posts: 849

Re: [SOLVED]Kernel 3.1 no cpu frequency scaling?

32bit or 64 kernel? well i don't understand then...

grimsbain

Member

From: South Dakota

Registered: 2011-11-01

Posts: 10

Re: [SOLVED]Kernel 3.1 no cpu frequency scaling?

I'm running 64bit Arch and just upgraded to the new kernel the other day and ondemand is working fine for me (and yes I checked just to make sure it was). While I was watching it (using "watch grep \"cpu MHz\" /proc/cpuinfo") it showed all three steps I have my system setup for (800mhz,1.5ghz,and 2.1ghz).

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-Thomas aka Grimsbain

nierro

Member

From: Milan, Italy

Registered: 2011-09-02

Posts: 849

Re: [SOLVED]Kernel 3.1 no cpu frequency scaling?

Damn! Yesterday was wrong...now no(I checked now), it isn't...1.20ghz...
Well don't ask me why... may be i'm an id..t :-)
however thanks! will mark this as solved (may be there was no problems indeed...)
Bye!