[tannhaeuser]

I've used this exact setup without problems since 2016 now. I had to upgrade Dell's EFI BIOS, upgrade kernels (b/c Skylake), and upgrade to Ubuntu 16.04 once it came out. I remember a very early trackpad driver having serious problems with keeping state, but that went away with a driver update within a week. Never got a problem with the lid; maybe check BIOS settings? It's true that the XPS's trackpad and Linux' power management isn't as nice as Apple's (because nobody's is).

[haspok]

I'm on an earlier model (9343 from 2015) and after the first ~6 months of "beta testing" it actually got quite good and reliable... ...until about a few months ago, when - I suspect due to a kernel upgrade to the 5.0 series - it started not suspending on closing the lid. Oh, and I can no longer run Powertop, because then it will not suspend at all.

This is so frustrating about using Linux - you get a random regression and then the only thing you can do is pray that someone will eventually fix it down the line.