Fix: Force LTX Desktop 1.0.3 to use a specific GPU (e.g. eGPU on CUDA device 1)

r/StableDiffusion
AI Hardware

If LTX Desktop 1.0.3 isn't recognising your eGPU or second GPU, it's because two files in the backend are hardcoded to always use CUDA device 0. You need to change them to device 1.