I have since installing 18.04 not been able to get the system to obey my selected timout for blank screen. I set "never" but after 10 minutes inactivity the screen goes blank whatever settings I have chosen. It's really enoyung vwhilst I'm watching a movie or such. Even using VLC it goes blank. Only SMPlayer overrides whichever devilish settings is activated without my knowledge. Been searching the net for answers but find nothing to solve this problem. Please help! Using 18.04 Mate on a desktop computer.
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