Масштабирование частоты процессора не работает по назначению на ваниле Ubuntu 16.04

Частота масштабирования процессора на моем ноутбуке (Intel (R) Core (TM) i7-4810MQ CPU @ 2,80 ГГц) не работает должным образом. После первоначальной установки ubuntu 16.04 я не внес изменений в управление питанием или масштабирование частоты процессора. Обычно я привык к правителю ondemand. Однако, кажется, этот губернатор был заменен некоторым pstate thingy и регулятором powersave в более новых ядрах.

Даже без нагрузки частоты процессора постоянно парят вокруг диапазона 2.x, тем самым заставляя вентиляторы быть шумными, а устройство для нагревания:

$ cat /proc/cpuinfo |grep -i mh
cpu MHz     : 3435.468
cpu MHz     : 2245.468
cpu MHz     : 2800.218
cpu MHz     : 2338.765
cpu MHz     : 2800.546
cpu MHz     : 2801.203
cpu MHz     : 2800.875
cpu MHz     : 2000.140
$ uptime
 14:57:49 up  5:15,  1 user,  load average: 0,01, 0,08, 0,16
$ cpufreq-info 
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
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 - 3.80 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 800 MHz and 3.80 GHz.
                  The governor "powersave" may decide which speed to use
                  within this range.
  current CPU frequency is 2.80 GHz.
analyzing CPU 1:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 1
  CPUs which need to have their frequency coordinated by software: 1
  maximum transition latency: 0.97 ms.
  hardware limits: 800 MHz - 3.80 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 800 MHz and 3.80 GHz.
                  The governor "powersave" may decide which speed to use
                  within this range.
  current CPU frequency is 2.80 GHz.
analyzing CPU 2:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 2
  CPUs which need to have their frequency coordinated by software: 2
  maximum transition latency: 0.97 ms.
  hardware limits: 800 MHz - 3.80 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 800 MHz and 3.80 GHz.
                  The governor "powersave" may decide which speed to use
                  within this range.
  current CPU frequency is 2.79 GHz.
analyzing CPU 3:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 3
  CPUs which need to have their frequency coordinated by software: 3
  maximum transition latency: 0.97 ms.
  hardware limits: 800 MHz - 3.80 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 800 MHz and 3.80 GHz.
                  The governor "powersave" may decide which speed to use
                  within this range.
  current CPU frequency is 2.80 GHz.
analyzing CPU 4:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 4
  CPUs which need to have their frequency coordinated by software: 4
  maximum transition latency: 0.97 ms.
  hardware limits: 800 MHz - 3.80 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 800 MHz and 3.80 GHz.
                  The governor "powersave" may decide which speed to use
                  within this range.
  current CPU frequency is 2.80 GHz.
analyzing CPU 5:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 5
  CPUs which need to have their frequency coordinated by software: 5
  maximum transition latency: 0.97 ms.
  hardware limits: 800 MHz - 3.80 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 800 MHz and 3.80 GHz.
                  The governor "powersave" may decide which speed to use
                  within this range.
  current CPU frequency is 2.78 GHz.
analyzing CPU 6:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 6
  CPUs which need to have their frequency coordinated by software: 6
  maximum transition latency: 0.97 ms.
  hardware limits: 800 MHz - 3.80 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 800 MHz and 3.80 GHz.
                  The governor "powersave" may decide which speed to use
                  within this range.
  current CPU frequency is 2.90 GHz.
analyzing CPU 7:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 7
  CPUs which need to have their frequency coordinated by software: 7
  maximum transition latency: 0.97 ms.
  hardware limits: 800 MHz - 3.80 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 800 MHz and 3.80 GHz.
                  The governor "powersave" may decide which speed to use
                  within this range.
  current CPU frequency is 2.79 GHz.

Любопытно, что я также наблюдал обратное поведение: машина находилась под большой нагрузкой, но частоты уменьшались до тех пор, пока ок. 20-30 сек. Все ядра достигли ~ 800 МГц. Я проверил cpufreq-info, и конфигурация показалась прекрасной (регулятор мощности, мин / макс. Частота на соответствующих уровнях). К сожалению, я не могу воспроизвести ошибку ...

Любая идея, что вызывает эти проблемы масштабирования или что можно сделать для их исправления?