Ubuntu: trouble finding/installing cpu driver for AMD FX 8350



Question:

I'm very much new to Linux, but I've hunted for days and can not find any solution to my problem. I'm trying to use cpufreq to control the throttle on my cpu (AMD FX-8350, 64-bit), but I apparently do not have drivers for the cpu:

galaxy@MilkyWay:/$ cpufreq-info  cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009  Report errors and bugs to cpufreq@vger.kernel.org, please.  analyzing CPU 0:    no or unknown cpufreq driver is active on this CPU    maximum transition latency: 4294.55 ms.  analyzing CPU 1:    no or unknown cpufreq driver is active on this CPU    maximum transition latency: 4294.55 ms.  analyzing CPU 2:    no or unknown cpufreq driver is active on this CPU    maximum transition latency: 4294.55 ms.  analyzing CPU 3:    no or unknown cpufreq driver is active on this CPU    maximum transition latency: 4294.55 ms.  

I think the drivers I have available to try are:

galaxy@MilkyWay:/$ ls /lib/modules/$(uname -r)/kernel/drivers/cpufreq/  amd_freq_sensitivity.ko  p4-clockmod.ko  speedstep-lib.ko  

But modprobe can't see them?:

galaxy@MilkyWay:/lib/modules/3.11.0-18-generic/kernel/drivers/cpufreq$ sudo modprobe amd_freq_sensitivity.ko  FATAL: Module amd_freq_sensitivity.ko not found.  

The same thing happens with any of the three. I've tried some various other tweaks on modprobe and every time I get a FATAL. I must being making some silly mistake. Are these even the right drivers? Help!

EDIT: I don't know if this matters, but I have Ubuntu running inside a VirtualBox.


Solution:1

Yes, it does matter if you run cpufrequtils Install cpufrequtils on a virtual machine vs. on bare metal.

Virtual Box and other virtualization software will use the real CPU but not all features of the host CPU are exposed to the guest.

Controlling the CPU frequency is one of the CPU feature that is not available in a virtual machine created with Virtual Box. CPU settings you make from the host OS will likely be respected in the guest.


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