LTX-2.5 distilled NVFP4 fails in ComfyUI
#16
by YieumYoon - opened
Is anyone else able to run the officialltx-2.5-22b-distilled-transformer-nvfp4.safetensorscheckpoint in ComfyUI?
I used ComfyUI’s built-in LTX 2.5 Image to Video template. Sampling fails immediately with:
RuntimeError: mat1 and mat2 shapes cannot be multiplied (3520x4096 and 2048x4096)
My environment:
- ComfyUI 0.32.0
- Ubuntu 24.04.4 LTS
- NVIDIA RTX 5090
- PyTorch 2.13.0+cu130
The official ltx-2.5-22b-distilled-transformer-comfy-int8-convrot.safetensors
checkpoint works with the same template.
I’m not sure whether this is related to the checkpoint, ComfyUI’s loading path,
or something specific to my setup. Can anyone confirm whether the NVFP4
checkpoint works?