LinuxQuestions.org - How do I add Module "cpufreq

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- - How do I add Module "cpufreq_stats" to ubuntu 9.04? (https://www.linuxquestions.org/questions/linux-software-2/how-do-i-add-module-cpufreq_stats-to-ubuntu-9-04-a-735601/)

How do I add Module "cpufreq_stats" to ubuntu 9.04?

I am trying to use PowerTop 1.11 on Ubuntu 9.04. On launching PowerTop, it says "FATAL: Module cpufreq_stats not found.". I googled a lot about adding this module, but could not find any useful info.

If you could give me any pointers in this direction, that would be great.

Thanks a lot!

It's a kernel module
Maybe you have it installed, but not loaded:

Code:

tred@vaio:~$ locate cpufreq_stats

/lib/modules/2.6.24-24-generic/kernel/drivers/cpufreq/cpufreq_stats.ko <- It's available

/usr/src/linux-source-2.6.24/linux-source-2.6.24/drivers/cpufreq/cpufreq_stats.c <- And here is the sourcecode (You don't need this)

tred@vaio:~$ lsmod | grep cpufreq

cpufreq_ondemand        9740  1

cpufreq_userspace      5284  0

cpufreq_powersave      2688  0

cpufreq_stats          7104  0  <- And it is loaded

freq_table              5536  3 speedstep_centrino,cpufreq_ondemand,cpufreq_stats

cpufreq_conservative    8712  0

If yours isn't loaded, then load it like this:

Code:

tred@vaio:~$ sudo modprobe cpufreq_stats

Then try again.

Thanks a lot tredegar for your response.

Which linux flavor are you working on?

My Ubuntu 9.04 is from a live-cd downloaded and installed through WUBI from winxp.

My /usr/src does not have a "linux-source-" directory like that of yours.

Code:

GeorgeOfTheBush@ubuntu:~$ ls /usr/src

linux-headers-2.6.28-11          linux-headers-2.6.28-13

linux-headers-2.6.28-11-generic  linux-headers-2.6.28-13-generic

There is no "cpufreq" directory in /lib/modules.

Code:

GeorgeOfTheBush@ubuntu:~$ ls -l /lib/modules/2.6.28-13-generic/kernel/drivers/c

char/        clocksource/ crypto/

There is no "cpufreq_stats.c".

Code:

GeorgeOfTheBush@ubuntu:~$ ls /usr/src/linux-headers-2.6.28-13-generic/drivers/cpufreq/

Kconfig  Makefile

Also found this info from http://aldeby.org/blog/index.php/lin...ervolting.html - "It appears that with Ubuntu Jaunty 9.04 the ACPI stuff is now in the kernel rather than in a module which requires you to patch and build the kernel sources."

I am not sure about how I could fix the problem?