Created attachment 193574 [details]
Update nvidia driver to the latest version
A commit references this bug:
Date: Sun May 27 09:19:52 UTC 2018
New revision: 470972
Update nVidia driver long lived branch to version 390.59, which had added
support for GeForce GTX 1050 (with Max-Q Design), Quadro P3200, and Quadro
P4200, but most importantly, for X.Org xserver ABI 24 (xorg-server 1.20).
Port was updated in ports r470972, thanks!