Re: Debian-13 bad performance on IPC

On 7/3/26 11:27 AM, Ralf Fassel wrote:

> I have tried:
> - echo performance | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
>    - no difference
> - sudo powerprofilesctl set performance
>    - no difference
> - cpupower-gui: set performance mode, limit min-CPU-Freq to 2500
>    - no difference
> - intel_pstate=disabled at boot
>    - performance even worse
> - intel_pstate=passive at boot, cpu-governor schedutil
>    - slightly worse performance
> - Debian-12, same software
>    - no difference

You might want to check what cpu power configuration is available in the 
bios firmware. Your IPC or motherboard manual should have instructions 
how to get into that, during boot, before grub starts.

A lot of 'compact' PCs provide a method of setting high performance vs 
quiet or energy saving. I'm of the opinion linux generally obeys that 
hardware setting but windows sometimes has ways of overriding it and 
using max power anyway. This can give the illusion of windows performing 
better than linux.

If that's not it then I might investigate whether there is some missing 
firmware. A starting point might be
sudo dmesg | grep -Ei 'fail|error'
to see whether anything jumps out.