Well, i spent also a couple of days on this issue on my Dell G5 5590 and conclude on the fact the bios itself do not mention the intel UHD 630 as a video card. When trying an xorg.conf with modesetting (intel) only, it seems to correctly upload i915 driver, all fine but nothing happened on the screen. Then i think we tried something not foreseen...with linux and we are damned to use the nvidia card only.