熱対策としてCPUの最高クロックを下げる

• Surface3で使うといいかも。

cpufreq-info

• debian : apt-get install cpufreqd cpufrequtils lm-sensors
  • /etc/cpufreqd.conf
• centos6 : yum install cpupowerutils
• centos7 : yum install kernel-tools
  • /etc/sysconfig/cpupower
  • Fedora 18 on ThinkPad X1 CarbonでCPUが常に遅い - nekop's blog

参考

• CPU Frequency Scaling (日本語) - ArchWiki

CPUの温度を確認

温度を確認

$ sensors
k10temp-pci-00c3
Adapter: PCI adapter
temp1:        +86.1 C  (high = +70.0 C)
                       (crit = +100.0 C, hyst = +95.0 C)

cpupowerを使う

インストール

$ sudo pacman -Sy cpupower

CPUの情報を表示

$ sudo cpupower frequency-info
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 4.0 us.
  hardware limits: 800 MHz - 1.70 GHz
  available frequency steps: 1.70 GHz, 1.50 GHz, 1.20 GHz, 800 MHz
  available cpufreq governors: ondemand, performance
  current policy: frequency should be within 800 MHz and 1.70 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.50 GHz (asserted by call to hardware).
  boost state support:
    Supported: no
    Active: no
    Boost States: 0
    Total States: 4
    Pstate-P0:  1700MHz
    Pstate-P1:  1500MHz
    Pstate-P2:  1200MHz
    Pstate-P3:  800MHz

hardware limits: 800 MHz - 1.70 GHz

この値の間で設定すればよい。

最大クロック周波数を800Mhzにする場合

sudo cpupower frequency-set -u 800MHz

現在のCPU周波数を確認

$ grep MHz /proc/cpuinfo
cpu MHz		: 800.000
cpu MHz		: 800.000
cpu MHz		: 800.000
cpu MHz		: 800.000

これで温度が下がるといいな