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From: Anton Farygin <rider@altlinux.com>
Date: Thu, 10 Jul 2014 11:09:50 +0400
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Subject: Re: [sisyphus] cpufreq-simple
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On 10.07.2014 09:45, Alexander Volkov wrote:
> On 2014-07-09 18:21:40 +0300, Michael Shigorin wrote:
> MS> On Wed, Jul 09, 2014 at 03:14:22PM +0400, Alexander Volkov wrote:
> MS> > Вопрос по настройке частоты проца - установил cpufreq-simple,
> MS> > но он не может рулить - нет доступа в /sys.
> MS> > Модуль ядра загрузился.  Это где собака порылась?
>
> MS> Что за процессор и что в dmesg | grep pstate ?
> model name      : Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz
> [    0.359728] Intel pstate controlling: cpu 0
> [    0.359736] Intel pstate controlling: cpu 1
> [    0.359747] Intel pstate controlling: cpu 2
> [    0.359754] Intel pstate controlling: cpu 3
> Поставил powersave, сделало вид, что применилось, однако:
> cpupower frequency-info
> analyzing CPU 0:
>    driver: intel_pstate
>    CPUs which run at the same hardware frequency: 0
>    CPUs which need to have their frequency coordinated by software: 0
>     maximum transition latency: 0.97 ms.
>    hardware limits: 800 MHz - 3.60 GHz
>     available cpufreq governors: performance, powersave
>     current policy: frequency should be within 800 MHz and 3.60	  GHz.
>    The governor "powersave" may decide which	speed to use
>    within this range.
>    current CPU frequency is 3.20 GHz (asserted by call to hardware).
>    boost state support:
>      Supported: yes
>      Active: yes

Добавьте параметр ядру intel_pstate=disable

перезагрузитесь и посмотрим результат.