No video after playing OpenGL game

Now I need help (finally!) :) After I quit some 3D game played under macOs (ie Tropico or CS:GO), I get no signal to display and it stays off. No matter what I do – changing output, switching cable, turning display off and on.

Powercolor Red Dragon Vega 56 with VGTab fix (already tried to not to undervolt it – no change), macOs 10.14.3 (Vanilla), WTG installed, QuickSync working, CSM disabled.

Has somebody else occured such behaviour? No problem with 3D apps that doesn't use full screen - Fusion 360, SketchUp…

submitted by /u/MacHeadSK
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