That's odd. I recently prepared an xps15 with Ubuntu 18.04 for one of my engineers moving from a Mac. I don't recall having to tweak the touchpad in any way.

That's odd. I recently prepared an xps15 with Ubuntu 18.04 for one of my engineers moving from a Mac. I don't recall having to tweak the touchpad in any way. I did need to install the correct nvidia driver and use nvidia-prime to default to the Intel video card for best battery life. I moved to an xps15 over a year ago and am really pleased with the transition. 17.04 and up have just worked for the most part. The occasional issues that arise usually take deep technical understanding to solve, but that's a price I don't mind paying to have an underlying set of tools and libraries based on Linux.