Request for inclusion of battery optimization tips

[akza07]

Device: LENOVO Legion Slim 5 16AHP9 83DH ( Ryzen 8845HS / 4060 )
Idle Drain of 23 Watt

I installed Fedora 40. Noticing battery drain. On a standard Nvidia driver installation and configuration with envycontrol, both iGPU and Hybrid mode has same 2hr 15min battery backup on idle. The same configuration on Windows gives me about 6hr. So something is off here. So if you or anyone have any tips for it, Please update it in the document.

[kasra3422]

Do you have an external monitor connected? The HDMI and USB-C display ports are linked exclusively to the discrete GPU, which means the dGPU cannot be turned off when an external display is attached. Additionally, using the wrong driver may prevent the dGPU from entering low-power mode, even without an external monitor connected. Try using a tool like 'Mission Center' to check if the dGPU is active.

[akza07]

In integrated mode, the hardware is basically removed as far as linux knows so nvidia-smi doesn't work either. Thinking of installing the drivers directly. It could be rpm fusion drivers have some modifications I guess.

[akza07]

An update on the battery issue.

Installing drivers both new Open Drivers and Proprietary drivers, They both are bad and never really turns off. They flip back n forth from 8 second of ACTIVE state then SUSPENDED for a fraction of second and ACTIVE again. The trigger seems to be some random Electron app or just coincidence. I get around 2hr of battery. Sometime GPU consumes 1W, 5W or 11W ( typical )

Why not use something like envycontrol and force integrated GPU mode?

If you use it to force integrated mode, it will only use integrated GPU to render screen but the GPU will always consume 11W or P0 state. Ideally it should be suspended state.

What's the solution?

Don't install Nvidia drivers but install envycontrol only and set it to integrated mode. You'll get 4hrs on normal use and 6hrs on low brightness and normal temps.

I'll update if and when I find a proper solution. supergfxctl is what many suggested but not seeing a device in mounted state doesn't mean it's off. That's only in Windows.