Arch Linux

napalmOnFire

Member

Registered: 2026-01-29

Posts: 1

Cpu frequency stuck at stock setting

Hello, any help would be appreciated.
Several days ago I installed arch being windows user for ages. The main purpose was getting freedom in choosing the minimal graphical os interface and minimum needed software to drive. So I chose niri since the idea of scrolling/tiling vms was like a miracle for me, fell in love with it) All went good, no problems in the way, thanks to outstanding documentation. But then I stumbled upon a problem I can't solve by googling  due to lack of experience, knowledge or something else. So I ask you for help.

My hardware:
MB: MEG Z390 ACE (MS-7B12), BIOS 1.B2 (MOD) 11/16/2021
CPU: Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz

I got cpu set fixed all cores to 4.8/4.4Ghz with fix vcore, disabled speedstep, speed shift, c-states in bios and some other less meaningful power-saving features.

The thing is when I boot to arch my cpu frequency is locked to 3.6Ghz.
Output for cpupower frequency-info:

analyzing CPU 2:
  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 to kernel
  boost state support:
    Supported: yes
    Active: yes

Output for ls /lib/modules/$(uname -r)/kernel/drivers/cpufreq/:

acpi-cpufreq.ko.zst  amd_freq_sensitivity.ko.zst  amd-pstate-ut.ko.zst  p4-clockmod.ko.zst  pcc-cpufreq.ko.zst  powernow-k8.ko.zst  speedstep-lib.ko.zst

If I try modprobe acpi-cpufreq:

modprobe: ERROR: could not insert 'acpi_cpufreq': No such device

If I change fixed to dynamic all core oc in bios with speedstep enabled, acpi-cpufreq module is then loaded, but when I boot to arch cpu frequency fluctuates from 3.6 to 4.8 and it's understandable to me why. Are there any way to get oced cpu with fixed  frequency in linux with speedstep off? I am asking this because my windows behavior is like that: stable 4.8 with all power-savings off in bios.