Okay at least it’s good to know that other displays work fine. That said, I’m not sure how much we can help you if the issue is specific to this display. As a last attempt you can try hard-coding resolution/mode information in Weston for your display: Working with Weston on TorizonCore | Toradex Developer Center
But I’m not sure if this would work for a display that’s not providing any information of it’s own at all.
Best Regards,
Jeremias