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I am trying to disable de p-state and c-state drivers on my desktop, i did what is described in this topic: Disable CPU frequency scaling

Then i changed the grub-file:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_pstate=disable processor.max_cstate=1 intel_idle.max_cstate=0 idle=poll"

And after this i updated the grub and added governor="performance" in the cpufrequtils file.

Besides, I did all the aforementioned in another computer and they are working(i think), so this is the expected output for cpufreq-info:

PC where the changes took effect

And here is the output i get on this one:

PC where the changes were ignored

In the end it looks like this computer is ignoring the changes i'm doing, any idea why?

Moreover the uname-a displays the following:

In the PC i'm trying to change: Linux oai-test1 4.4.0-31-generic #50~14.04.1-Ubuntu SMP Wed Jul 13 01:07:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

In the PC the changes took effect: Linux oai-test2 3.19.0-61-lowlatency #69~14.04.1-Ubuntu SMP PREEMPT Thu Jun 9 10:15:00 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

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  • Can you edit your question with the output of 'uname -a' from each computer along with system model number and make?
    – WinEunuuchs2Unix
    Nov 2, 2016 at 14:57
  • Sorry what do you mean by system model number and make?
    – Joao Amaral
    Nov 2, 2016 at 15:06
  • System model and make, is Dell Inspiron 17R 7720 AE. I would switch your kernel off if low latency to generic to fix the problem.
    – WinEunuuchs2Unix
    Nov 2, 2016 at 17:11
  • Neither of your kernels are giving you protection from 'Dirty COW' security fix as they predate Oct 21/2016
    – WinEunuuchs2Unix
    Nov 2, 2016 at 19:39
  • Kernel 3.19 is very old and I'll have to research if it even includes Intel pstate support. If the machine isn't freezing I wouldn't even worry about Intel idling.
    – WinEunuuchs2Unix
    Nov 2, 2016 at 19:42

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