ASUS X507MA笔记本Intel Pentium Silver N5000处理器在Ubuntu系统中CPU频率固定1.1GHz的问题求助

我最近碰到了一个棘手的问题：我的ASUS X507MA笔记本装的是Intel Pentium Silver N5000（Gemini Lake）处理器，在Ubuntu、CentOS、Debian这些Linux发行版上，CPU频率一直死死固定在1.1GHz的基础频率。我用watch cat /proc/cpuinfo | grep MHz命令持续监控，确实没看到频率有任何动态变化。

不过有意思的是，我试着装了Arch Linux之后，一切居然开箱即用——CPU能根据系统负载自动调节频率，完全正常。但因为学习需求，我必须使用Ubuntu系统，所以想请教大家怎么解决这个问题。

我对比了Arch和Ubuntu上cpupower frequency-info的输出结果，差异很明显：

Arch Linux下的输出： #

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: 800 MHz - 2.70 GHz
available cpufreq governors: performance powersave
current policy: frequency should be within 800 MHz and 2.70 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency: Unable to call hardware
current CPU frequency: 1.79 GHz (asserted by call to kernel)
boost state support:
Supported: yes
Active: yes

Ubuntu 20.04 LTS下的输出： #

analyzing CPU 0:
no or unknown cpufreq driver is active on this CPU
CPUs which run at the same hardware frequency: Not Available
CPUs which need to have their frequency coordinated by software: Not Available
maximum transition latency:  Cannot determine or is not supported.
Not Available
available cpufreq governors: Not Available
Unable to determine current policy
current CPU frequency: Unable to call hardware
current CPU frequency:  Unable to call to kernel
boost state support:
Supported: no
Active: no

想问问大家，为什么这个问题在Ubuntu上会出现，Arch却能正常识别并启用动态调频？有没有办法在Ubuntu上解决这个问题，让我的CPU能正常根据负载调节频率？非常感谢各位的帮助！

备注：内容来源于stack exchange，提问作者Olga Dymova