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

A chaque fois que j'essaie de lancer #powertop sur mon serveur #proxmox , peu importe ce que je fais, le serveur finit par planter, dès fois juste en lançant l'outil.

Ca m'énerve un peu.

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

Why does #powertop only show how much wattage it's discharging and can't it show how much wattage it's charging?