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我的配备 ivybridge 的 Dell XPS 13 上的 CPU 频率不会超过 800MHz

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我的配备 ivybridge 的 Dell XPS 13 上的 CPU 频率不会超过 800MHz

我的 Dell XPS 13 Ivybridge CPU 的频率无法超过 800MHz。

$ 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 - 2.60 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 1000 MHz and 2.60 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 800 MHz.
  boost state support:
    Supported: yes
    Active: yes
    25500 MHz max turbo 4 active cores
    25500 MHz max turbo 3 active cores
    25500 MHz max turbo 2 active cores
    25500 MHz max turbo 1 active cores

即使有问题sudo cpupower frequency-set -g performance我仍然得到800MHz。然后我尝试了

$ sudo cpupower frequency-set -f 2.60GHz
Setting cpu: 0
Error setting new values. Common errors:
- Do you have proper administration rights? (super-user?)
- Is the governor you requested available and modprobed?
- Trying to set an invalid policy?
- Trying to set a specific frequency, but userspace governor is not available,
   for example because of hardware which cannot be set to a specific frequency
   or because the userspace governor isn't loaded?

...没有运气。我的笔记本电脑速度很慢，尤其是在使用电池运行时。我看到有一个未解决的错误这里这似乎与我的经历相似，但由于信息不足而关闭。有人能帮助我吗？

编辑：

我使用该intel_pstate=disable选项启动，现在可以设置频率和调速器。但是，即使在性能模式下，我的笔记本电脑仍然运行缓慢且无响应，因此还有其他问题。

答案1

你需要加载userspace模块

sudo modprobe cpufreq_userspace

并设置州长

cpupower frequency-set --governor userspace

/sys/devices/system/cpu/cpu0/cpufreq/ 中的文件提供了控制频率缩放子系统的信息和方法。种子值以 Khz 为单位给出。您需要成为 root 才能访问 /sys 文件系统。

例子：

您的最大速度为/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq。

cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
700000

您的最低速度位于 /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq。

cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq
500000

您可以写入 /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed 来更改当前速度。

echo 700000 | sudo tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed

cat /proc/cpuinfo

cpu MHz  : 697.252

echo 900000 | sudo tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
cat /proc/cpuinfo
cpu MHz  : 976.152

获取有关如何更改频率的更多信息

http://www.thinkwiki.org/wiki/How_to_make_use_of_Dynamic_Frequency_Scaling

要显示频率和更多信息，请尝试安装i7z

sudo apt-get update
sudo apt-get install i7z

运行 i7z 类型：sudo i7z

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