The power-management of the Lenovo T14s Gen4 AMD Ryzen has gotten significantly better in Kernel 6.17, WOW !!

5.77 W battey discharge with the 2,8K OLED display on 40% brightness and just 620.4 wakeup/s that is *a ton* better than anything, I've seen with that device in the last 2,5 years.

The powe-rmanagement for the Ryzen Pro CPUs was notoriously bad on linux.

My last test, which was shortly after the release of Fedora 42 was stil in the 7.8-8.0W range ...

Slowly that laptop is getting feasable on Linux 🙂

#linux #fedora #Kernel617 #powertop #lenovo #thinkpad

#H4ckseed Nueva Entrada: Powertop - Consumo de Energía en Linux

La herramienta permite mostrar y exportar informes sobre la tasa de descarga estimada y estadísticas del comportamiento de procesadores y dispositivos. Es una utilidad gratuita y de código abierto desarrollada por Intel para monitorizar el consumo energético, también permite ajustar fácilmente algunos parámetros del kernel sobre la marcha para maximizar la duración de la batería...

#linux #Powertop…

https://h4ckseed.wordpress.com/2025/09/24/powertop-consumo-de-energia-en-linux/

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Puzzled by what I'm seeing in #powertop on Fedora 42 in the list of things keeping the CPU awake:

- What is this "tick_nohz_handler" thing? I tried looking it up on the web, never found a clear answer.

- Why would gnome-text-editor be the only app waking up the CPU 59-60 times per second at all times?

#Linux #powermanagement #energyefficiency

So, #fedora uses tuned-ppd, which is an power-profiles to tuned compatibility daemon.

It translates the requests over dbus for the profiles to tuned profiles, which (for powersave) contained a section

```
[video]
radeon_powersave=dpm-battery, auto
panel_power_savings=3
```

where the `panel_power_savings=3` basically translates to a parameter of #amdgpu called panel_power_savings. The kernel parameter is `amdgpu.abmlevel`: ABM level (0 = off, 1-4 = backlight reduction level, -1 auto (default)) (int)

I basically forced this to 0 to avoid the really weird panel effects. #Powertop didn't show me significant savings there.

#linux #lenovo #thinkpad #t14s

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