Optimus-manager in "integrated" mode

Support Graphics & Display
1

Hi everyone, I have a Lenovo Legion 5 and I installed optimus-manager in order to have HDMI working with the “hybrid” mode. However, I don’t always use HDMI, and in that times I would like to use the “integrated” mode in order to don’t use my Nvidia GPU at all (save battery).

I can switch with no problems, but apparently my GPU is still detected (is still running). Blender can detect and use my GPU, for example. Isn’t optimus-manager in “integrated” mode supposed to completely power off my GPU?

Am I missing something? Thanks in advance, ask me anything.

> inxi -G
Graphics:
  Device-1: NVIDIA GA106M [GeForce RTX 3060 Mobile / Max-Q] driver: nvidia
    v: 520.56.06
  Device-2: AMD Cezanne [Radeon Vega Series / Radeon Mobile Series]
    driver: amdgpu v: kernel
  Display: x11 server: X.Org v: 21.1.4 driver: X: loaded: modesetting
    dri: radeonsi gpu: amdgpu resolution: 1920x1080
  API: OpenGL v: 4.6 Mesa 22.2.3 renderer: AMD Radeon Graphics (renoir LLVM
    14.0.6 DRM 3.48 6.0.8-1-MANJARO)

> optimus-manager --status
Optimus Manager (Client) version 1.4

Current GPU mode : integrated
GPU mode requested for next login : no change
GPU at startup : hybrid
Temporary config path: no
2

In the right setup, the GPU will not be active all the time even in hybrid mode. E.g. check if

cat /proc/driver/nvidia/gpus/*/power

says

Runtime D3 status:          Enabled (fine-grained)

This can be enabled by setting

dynamic_power_management=fine

in the optimus-manager configuration (/etc/optimus-manager/optimus-manager.conf).

is still running

Is that what

cat /sys/bus/pci/devices/0000\:01\:00.*/power/runtime_status

says? (Where 0000:01:00.* is the address of the devices on the nvidia gpu - you can run lspci find out, but usually nvidia gpu is at the above address on laptops.)

3 
Runtime D3 status:          Enabled (fine-grained)
Video Memory:               Off

GPU Hardware Support:
 Video Memory Self Refresh: Supported
 Video Memory Off:          Supported

Power Limits:
 Default:                   N/A milliwatts
 GPU Boost:                 N/A milliwatts

So I suppose D3 is ok.

> cat /sys/bus/pci/devices/0000:01:00.0/power/runtime_status
suspended

When using Blender, it turns to “active”.

Don’t get me wrong, my system is working fine, but I expected that the “integrated” mode would completely power off my Nvidia card, in order to save battery.

Thanks!

4

That only applies to the display configuration, using CUDA, etc. can still power up the GPU – as far as I’m aware.

5

Thanks, I didn’t know that.
Can you redirect me for some docs or more info regarding that topic?

Again, thanks for your time.

6

Maybe these two:

7

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