I’m probably having the same problem with my MSI GS65 with RTX 2060 and Batocera 29. I can’t get the Information screen to mention NVIDIA instead of Mesa, so that could be it. I’ve read to try running batocera-hybrid-nvidia
but that black screens Batocera for good unless I delete the nvidia conf file it creates. I’ve also found someone mention trying to switch to HDMI output from within Kodi, but HDMI doesn’t appear there for me, either.