10-09-2018 11:51 AM - edited 10-10-2018 12:58 AM
After some days of use my new ThinkPad Hybrid USB-C with USB-A Dock (40AF) just gave me a black monitor screen on the Dispalyport 1 output.
The HDMI port no.1 do give output OK.
Tested the monitor's (LG 43UD79) displayport input against another laptop and its working just fine.
Firmware of the dock is updated with latest version. And my Thinkpad L580 is also up to date with Win10.