Well, there’s a small problem with my MacBook Pro,

MacBook Pro

and since I always connect it to a monitor at work in clamshell mode, I took the opportunity to update the monitor to this​ ​Apple recommended LG5K display​ ​to see what would happen.
The driver is set automatically on the Mac side by just connecting. Power is conveniently supplied by Thunderbolt 3 as well.
However, mouse, keyboard or other USB devices need connecting separately with a USB-C hub. There are 3 USB-C ports on the back of the monitor, but the hub function doesn’t seem to work that well. What is this for? When it’s connected all together with a Thunderbolt 3 hub from a MacBook Pro it’s really convenient. Well, I guess it will work in due course.
There is also a small flaw in terms of the display. I wonder if it’s a problem with the graphics card … ? It’s an uphill struggle making my Macbook Pro normal again.