Comment by Lio

If you want a 15" linux supported laptop from Dell you need to go with the Precision line.

The XPS 15 is not sold as compatible/supported, only the XPS 13.

(I have an XPS13. It's mostly pretty good except I have regular occasional issues with Wifi when waking up from sleep. The wifi is soldered in so can't be replaced unfortunately. Hopefully that's better on the later versions).