Yes, the Debian setup is going to be just for cuda and ml. It's intended for cheap and easy experiments, focusing on ml for small systems.
I wonder if it is worth trying the iGPU, if you haven’t already.
It would be a shame to distro-hop for a non-preference-based reason like this.
You make a a good point, I've been having one card do double-duty as hdmi output and GPGPU. I'll try the motherboard's built-in hdmi and see how that goes.
I've been really busy with other stuff for a few weeks and haven't really thought about the best way to fix this. Thanks for the suggestion!