[stackoverflow] [progress Openedge Abl] Ubuntu 16.04 Screen Turns To Gray Scale

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DougT

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Using ubuntu 16.04, x86_64, nvidia gtx-960 graphics card, nvidia driver 357.67. Using SDL2 for checker board.

In my checker program, when the computer is determining its next move and takes longer than about 7 seconds (which is most of the time), the checker board and checkers turn to gray scale. Once the move calculations are finished, the screen returns to the color mode.

In the SDL2 event loop I am setting the SDL_USEREVENT every 125 ms.

I am not using a battery or a laptop. There is no option to dim the screen on 16.04. I tried xscreensaver and turned the screensaver off. I tried

gsettings set org.gnome.settings-daemon.plugins.power idle-brightness 180


but still got the dimming. Suggestions?

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