Clarification on behaviour of ignore-drm-device

[frnsys]

Hi, I'm trying to ignore my eGPU so niri only uses my iGPU. In my config I have:

debug {
    render-drm-device "/dev/dri/by-path/pci-0000:c2:00.0-render"
    ignore-drm-device "/dev/dri/by-path/pci-0000:03:00.0-render"
}

From this discussion: #1734

niri currently always creates a renderer for all GPUs that makes it show up in nvidia-smi. It doesn't mean niri uses the GPU for anything else

so does ignore-drm-device also not prevent the niri from using the GPU? With these settings it still shows up in nvidia-smi so I'm guessing not, but not sure if I'm misunderstanding how it works.

[YaLTeR]

With ignore-drm-device niri doesn't even open the device. So I'm not sure why and how it could show up. Assuming that ignore-drm-device has the right path, etc.

[paul-vlad]

Possibly related to/and fixed by #3651