modprobing acpi-cpufreq fails

finferflu · 2008-03-11 14:54:11

I'm trying to load the module acpi-cpufreq, but it keeps failing:

$ sudo modprobe acpi-cpufreq
FATAL: Error inserting acpi_cpufreq (/lib/modules/2.6.24-ARCH/kernel/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.ko): No such device

however:

$ ls /lib/modules/2.6.24-ARCH/kernel/arch/x86/kernel/cpu/cpufreq/ | grep acpi
acpi-cpufreq.ko

Am I missing something?

Thanks for your time

skottish · 2008-03-11 18:40:40

This same thing happened to me over the weekend. I simply didn't have speedstep enabled in the BIOS.

finferflu · 2008-03-11 18:42:27

Ah crap! That sounds complicated to me. I have no clue about how to handle BIOS settings (apart from booting from CD).

dyscoria · 2008-03-11 18:47:52

Nah, its dead easy usually. Once you get into your BIOS, just browse around all over the place (probably under some sort of 'power management' section) and find speedstep or whatever it's called for your CPU and enable.

What CPU have you got actually and is it speedstep capable? I think there are different modules for different CPU's too.

finferflu · 2008-03-11 18:49:50

I have an Intel Pentium 4, and I don't know much about this subject, but I read somewhere that P4 supports speedstep...

finferflu · 2008-03-11 18:58:35

Ok, I've just checked the BIOS settings, and there's no such a thing as speedstep

fwojciec · 2008-03-11 19:10:39

On my old pentium 4 laptop "acpi_cpufreq" didn't work, I had to use the "p4-clockmod" module -- if I remember correctly.

finferflu · 2008-03-11 19:15:12

Is it the same thing in functionality?

Edit:
Well, that worked, thanks
Now I gotta figure out how to use it, my CPU is stuck at 325MHz

Last edited by finferflu (2008-03-11 19:19:57)

fwojciec · 2008-03-11 19:26:45

I don't know -- but the error you are getting doesn't say that the module is not found but that there is no device on your system which works with acpi_cpufreq module, so you have to find module that will work with your processor and p4-clockmod may be the only option in your case.

finferflu · 2008-03-11 19:28:25

Yeah it's working. I'm now dealing with acpid that fails to start, so I have problems running cpufreqd, but cpufreq runs just fine.

Edit
Nevermind. It failed because it was already running
I shouldn't post while the work is in progress, it only ruins my public image

Last edited by finferflu (2008-03-11 19:30:53)

finferflu · 2008-03-11 19:58:06

Ok, since I'm here, I might as well ask. I don't really understand what I'm supposed to do. I have now an applet on my gnome-panel that allows me to switch between modes: conservative, ondemand, performance, and powesave. I'm not so expert about hardware. Can anyone give me some hints or point me to an easy tutorial (i.e. not too much technical jargon)?

Thanks

dyscoria · 2008-03-11 20:02:13

finferflu wrote:

Ok, since I'm here, I might as well ask. I don't really understand what I'm supposed to do. I have now an applet on my gnome-panel that allows me to switch between modes: conservative, ondemand, performance, and powesave. I'm not so expert about hardware. Can anyone give me some hints or point me to an easy tutorial (i.e. not too much technical jargon)?
Thanks

Do you just mean what the modes are? This article has a short description of each one. I assume that if the gnome-panel applet can select a mode, the module is already loaded. So all that you've got to do now is select the mode you want. Powersave is best for a very hot summer, ondemand is best for general use (you won't notice any slowdown).

finferflu · 2008-03-11 20:08:18

Thanks dyscoria, that's what I was looking for
However I can notice slowdonws with the ondemand mode. For example now that I'm typing, the frequency is at about 325 MHz and I can see there is some delay for the characters being printed on the screen. Scrolling the browser's page is choppy and slow. I guess my CPU is slow at changing its frequency...

dyscoria · 2008-03-11 22:50:49

Hmmm, 325mhz does seem a little low a frequency to have

I'm not noticing any slowdown with ondemand because i'm using a core 2 duo with the minimum frequency of 800mhz on each processor. My BIOS has the range fixed at 1.2-2ghz so maybe its even higher

I guess unless you really need a cooler CPU (do you know the average temp that your CPU runs at?) you can just select performance, and use ondemand for the summer. I think cpu's are supposed to be able to take up to 70C/158F without a problem anyways.

Last edited by dyscoria (2008-03-11 22:51:20)

finferflu · 2008-03-12 05:46:21

Well, I've set the minimum frequency to 975 MHz, so now I can run the ondemand mode without slowdowns

finferflu · 2008-03-15 18:55:51

Ok, after my lappy died, I have bought a new one. Same problem.
This time my processor is an Intel Celeron M:

$ sudo modprobe acpi-cpufreq
FATAL: Error inserting acpi_cpufreq (/lib/modules/2.6.24-ARCH/kernel/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.ko): No such device
$ sudo modprobe speedstep_centrino
FATAL: Error inserting speedstep_centrino (/lib/modules/2.6.24-ARCH/kernel/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.ko): No such device

Is it possible at all to scale cpu frequency on an Intel Celeron M? I was able to do it on a 5 year old processor, it would be odd if I couldn't with a brand new one.

Thanks for your time

schivmeister · 2008-03-15 19:05:29

p4-clockmod

more info: http://www.thinkwiki.org/wiki/Intel_Celeron_M

finferflu · 2008-03-15 19:21:15

LOL! I thought that module was for old processors only so I didn't dare trying it...
Thanks a lot schivmeister

Arch Linux

#1 2008-03-11 14:54:11

modprobing acpi-cpufreq fails

#2 2008-03-11 18:40:40

Re: modprobing acpi-cpufreq fails

#3 2008-03-11 18:42:27

Re: modprobing acpi-cpufreq fails

#4 2008-03-11 18:47:52

Re: modprobing acpi-cpufreq fails

#5 2008-03-11 18:49:50

Re: modprobing acpi-cpufreq fails

#6 2008-03-11 18:58:35

Re: modprobing acpi-cpufreq fails

#7 2008-03-11 19:10:39

Re: modprobing acpi-cpufreq fails

#8 2008-03-11 19:15:12

Re: modprobing acpi-cpufreq fails

#9 2008-03-11 19:26:45

Re: modprobing acpi-cpufreq fails

#10 2008-03-11 19:28:25

Re: modprobing acpi-cpufreq fails

#11 2008-03-11 19:58:06

Re: modprobing acpi-cpufreq fails

#12 2008-03-11 20:02:13

Re: modprobing acpi-cpufreq fails

#13 2008-03-11 20:08:18

Re: modprobing acpi-cpufreq fails

#14 2008-03-11 22:50:49

Re: modprobing acpi-cpufreq fails

#15 2008-03-12 05:46:21

Re: modprobing acpi-cpufreq fails

#16 2008-03-15 18:55:51

Re: modprobing acpi-cpufreq fails

#17 2008-03-15 19:05:29

Re: modprobing acpi-cpufreq fails

#18 2008-03-15 19:21:15

Re: modprobing acpi-cpufreq fails

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