I have a similar Dell 7510 running Debian Sid and my experience is also mostly positive. I had to disable the built in graphics in the BIOS to get my 2 externa

I have a similar Dell 7510 running Debian Sid and my experience is also mostly positive. I had to disable the built in graphics in the BIOS to get my 2 external monitors to work (some Nvidia Quadro mess), suspend doesn’t work properly (common Linux problem) and the headphone port does not work unless you toggle microphone mute on an off first (could be some pulseausio wierdness but I haven’t gotten to the bottom of it so far). Even played some games on it, although I try to stay away from that sort of thing.