samsung galaxy s5 screen blink problem I am using Samsung Galaxy S5 android 6.0.1, after marshmallow update i am facing screen blinking problem. when i unlock screen it started blinking. and when i open hayday Game, it stopped blinking. so anyone tell me what should be the issue for this problem?
Try this solution: 

Go to settings >> system >> About device.

Find "Build number" and click 6 times fast on it.

It will enable developer options menu in settings.

Come back to Home Screen, and then go back to Settings >> system >> Now you will see the Developer Options menu

Now go to Developer options >> Drawing Section or Rendering Section >> Find "Turn off hardware overlays" or "disable hardware overlays" >> This will force the phone to always use GPU for screen adjustments.

Restart your device and see no more screen blinking.