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Lenovo T14 Gen1 CPU 在 Linux 中随机卡在低频

tag-icon • tag-icon linux ubuntu fedora slowdown
Lenovo T14 Gen1 CPU 在 Linux 中随机卡在低频

在我的笔记本电脑上安装 Fedora 33（也尝试过 kubuntu 和 ubuntu 20.04）后，我遇到了这样的问题：在一段时间后，CPU 随机卡在低频（400MHz-800Mhz）并且不加速，导致响应时间非常慢。

cpupower 命令不会更改 CPU 速度，即使它返回状态代码 0。

我尝试禁用 intel_pstate 和 Thermald。

一些系统信息：

$ uname -a
Linux localhost.localdomain 5.10.7-200.fc33.x86_64 #1 SMP Tue Jan 12 20:20:11 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux 
$ cat /etc/*release 
Fedora release 33 (Thirty Three)
$ grep "model name" /proc/cpuinfo
model name      : Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz
$ grep "cpu MHz" /proc/cpuinfo
cpu MHz         : 800.004
cpu MHz         : 800.002
cpu MHz         : 800.001
cpu MHz         : 800.002
cpu MHz         : 800.005 
cpu MHz         : 800.001 
cpu MHz         : 800.000 
cpu MHz         : 800.002

$ 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:  Cannot determine or is not supported.
hardware limits: 400 MHz - 4.90 GHz
available cpufreq governors: performance powersave
current policy: frequency should be within 400 MHz and 4.90 GHz.
               The governor "performance" may decide which speed to use
               within this range.
current CPU frequency: Unable to call hardware
current CPU frequency: 500 MHz (asserted by call to kernel)
boost state support:
 Supported: yes
 Active: yes

答案1

似乎https://github.com/erpalma/throttled工具解决了这个问题。 （我在 fedora 32 中测试了几天，在 Ubuntu 20 中测试了几个小时）。

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