Green Screen Flashing Bug on Builds
Green Flicker Bug Issue
In UE4.16 and 4.18 (we have modified the engine for our game though)
We have started to see this issue with shipping builds of our game. The screen goes Green and flickers at 60FPS
• Black shows as Green • Yellow shows as Pink. • Only occurs in Fullscreen (but that's the default so the first thing you see). • Visible with or without VSync, although Vsync ON exacerbates the problem.
The issue can be resolved locally by changing from Fullscreen to Windowed. Changing to borderless also solves the problem and means you don't have to play in a window.
However this is a very problematic issue.
Drivers: Latest Windows update Latest Nvidia Drivers (as of Wed 29th Nov 2017)
The DX dialogue is attached.
asked Dec 04 '17 at 06:13 PM in Bug Reports
I have faced the same problem in UE 4.20.3. You may avoid the problem with following option in DefaultEngine.ini file.
The default value is 4 which makes the engine to create default back buffers with PF_R10G10B10A2 format. But I've figured out the format in fullscreen mode is not supported well on some GPUs by testing with DirectX 11 sample program. When I ran BasicHLSL11 sample program with the corresponding pixel format of DXGI, I could see the same situation just like green flickering screen.
I think the reason is not caused by UE though, I wish Epic guys make some modifications to address the problem by changing policies to select default back buffer pixel format.
Here is the testing computer's spec.
I hope this helps you.
I am going to mark this as answered due to a lack in response. If you would like to reopen this please reply with more information. Thank you.
answered Dec 11 '17 at 02:35 PM
Jeff A ♦♦ STAFF
Here is how to fix screen flashing issue in Windows 10
answered Mar 22 '18 at 01:42 PM
Thanks. I Had the same problem with the GeForce 970 card which started happening after the last windows update.The link from J.C.Smith worked.
answered Dec 28 '17 at 08:37 AM
this has been fixed for me with latest nvidia game ready drivers... win 10/nvidia 980 ti/2 monitors
answered May 31 '18 at 01:06 PM
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