Sometimes I'd have to power cycle the monitor like 5 times to finally get it to display something after cold boot or waking from sleep.Īnyway, I determined that the issue never occurred when I deselected the 'Displayport 1.2' option in the monitor's on screen display (using the buttons on the monitor to navigate the menu).

I was having the exact same issue with an LG 4k monitor and my old Radeon 270x, in Windows 10. Hey, I don't know if you ever found a solution to this issue.