Linux Mint on Dell XPS 9560

For the most part, Linux Mint 18.3 worked on my new Dell XPS 9560.

That said, what I did have to change:

• the 4k display was impossible to read, so I had to switch to Auto or Double (Hi-DPI) for the User interface scaling
• Menu (lower left) -> Settings -> General -> User interface scaling: 
• prevent lockups by disabling Nouveau video driver and using the commercial Nvidia driver. Maybe I'm just unlucky, but this isn't the first time the Nouveau driver has caused serious issues. 
• Menu (lower left) -> Settings -> Driver Manager (under Administration) -> NVIDIA binary driver 
• another oddity was that the kernel logs (dmesg) were getting spammed with AER logs. This was more of an annoyance than impacting the usability of the system, but I disabled them anyway. In a terminal window: 
• sudo su - 
• Enter password as requested 
• vi /etc/default/grub 
• Change the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pci=noaer" 

 Hope that helps.