powertop wants cpufreq_stats to be a module

[Dimitrios Symeonidis]

I compiled my own kernel (2.6.24.4) and included cpufreq_stats in the kernel (not as a module). Powertop expects this to be a module, so tries to do a modprobe, but doesn't find it and reports a fatal error "module cpufreq_stats not found". I went back to my kernel configuration and configured CONFIG_CPUFREQ_STATS=M, recompiled and installed and the error went away. Powertop (an Intel project) should check also if the module is included by default in the kernel before trying to load it.

[Jeffrey Baker (jwbaker)]

Confirmed on Jaunty Alpha 2, amd64, powertop 1.10-2, kernel 2.6.28-4.5. Since Ubuntu is now shipping the kernel with CONFIG_CPU_FREQ_STATS=Y, this will happen to everybody regardless of whether they build their own custom kernels or use the distro kernel.

[Michael Marley (mamarley)]

Yep. The importance here definitely needs to be bumped up.

[Dimitrios Symeonidis (azimout)]

I had emailed Arjan van de Ven (powertop developer) on Jun 12, 2008, and his answer was
"I'm curious about what version of powertop you have, since the code got fixed a while ago ... need to find out if your version is from before the fix, or if the fix is malfunctioning."

At the time I had powertop 1.9-2ubuntu1, now I have 1.10-1

[regardtv (regardt)]

Hi,

Installed powertop source packages from jaunty.

Updated to 1.11 from powertop source - module error still comes up - so it would appear that their fix didn't work.

Trivial patch to silence the modprobe error attached

[Michael Marley (mamarley)]

The version of PowerTop recently released for Jaunty (1.11) fixes this bug.

[Shaahul (shaahulhameed)]

I just installed PowerTop 1.11 on Ubuntu 9.04. When I launch PowerTop, this is what I get:

    FATAL: Module cpufreq_stats not found.
    PowerTOP 1.11 (C) 2007, 2008 Intel Corporation

    Collecting data for 5 seconds

Is this a bug?? How do I add the "cpufreq_stats" module to my kernel??

[Dimitrios Symeonidis (azimout)]

@shaahul: this issue has been fixed in powertop 1.11, how is it possible that you're still getting this message? what is your kernel version? (output of uname -a)

[Shaahul (shaahulhameed)]

Hi Dimitrios

    Linux ubuntu 2.6.28-11-generic is the kernel version that I am using.

[Dimitrios Symeonidis (azimout)]

where did you install powertop from?

[Shaahul (shaahulhameed)]

from lesswatts.org

On Sat, Jul 18, 2009 at 1:13 AM, Dimitrios Symeonidis <email address hidden>wrote:

> where did you install powertop from?
>
> --
> powertop wants cpufreq_stats to be a module
> https://bugs.launchpad.net/bugs/217261
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “powertop” package in Ubuntu: Fix Released
>
> Bug description:
> I compiled my own kernel (2.6.24.4) and included cpufreq_stats in the
> kernel (not as a module). Powertop expects this to be a module, so tries to
> do a modprobe, but doesn't find it and reports a fatal error "module
> cpufreq_stats not found". I went back to my kernel configuration and
> configured CONFIG_CPUFREQ_STATS=M, recompiled and installed and the error
> went away. Powertop (an Intel project) should check also if the module is
> included by default in the kernel before trying to load it.
>

[Dimitrios Symeonidis (azimout)]

Well, then you should use the version in the Ubuntu repositories. And generally, you should only report problems about software that you have installed from Ubuntu servers, as we have no control of the software in other servers.