No video output on monitor attached to eGPU

Help
, , ,
1

I am experiencing an issue with my external monitor connected to an NVIDIA RTX 2070 eGPU via Thunderbolt 4. My laptop is configured with the following hardware:

CPU: Intel Core i7-12700H
Internal GPU: NVIDIA RTX 3050 Ti Mobile
External GPU: NVIDIA RTX 2070 (eGPU via Thunderbolt 4)

I am running KDE Plasma 6.3.4 with Wayland as the display server. The external monitor connected to the eGPU does not display any output, despite being detected by the system.

What I’ve done:

  1. Installed the latest Nvidia stable driver 570
  2. Set the GBM_BACKEND env variable to nvidia-drm
  3. Reconfigured nvidia.conf to explicitly enable modeset.

I am seeking guidance on further debugging steps, specifically for identifying potential conflicts between the internal and external GPUs under Wayland.