I have a Dell XPS 15 [L502x]. it comes with an Nvidia GeForce GT525 GPU card.
It's an Optimus laptop so an Intel card powers the main display but the hdmi out port connects to the Nvidia card.
I have never had the HDMI out work in Fedora and would like to rectify that.
Before I go back down the various rabbit-holes around optimus, bumblebee, nvidia, nouveau, Wayland and xorg I would like to find someone who has it working - just to see what they use.
If you have a Dell L502x running Fedora 25 and you have your HDMI out running please let me know. It would be great if you could post your working config.
If you run a different flavour of linux I would also be interested.
If you could take follow on questions that would be great!
disclosure: I asked this question a couple of days ago on ask.fedoraproject [https://ask.fedoraproject.org/en/question/97486/does-anyone-have-hdmi-out-working-on-dell-xps-15-l502x-with-fedora-25/] but there hasn't been any response so I am castingmy net a bit wider. I hope that's ok.