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[ubuntu] 12.04 screen darkens at 10 min of idle

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http://ubuntuforums.org – 12.04LTS & Gnome Classic-no effects I have tried a number of things to permanently stop the screen from going dark after 10 min of idle time. Screen comes alive with key or mouse movement. For a session, the command line entry "xset s off" works just fine. What I have tried: 1)xscreensaver and gnome-screensaver removed 2a) Made on the desktop a script file "kill_blanking.sh" which has only one line: "xset s off". 2b) Apps>Sys Tls>Prefs>Startup Apps: added kill_blanking.sh. Went to its install location "~./.config/autostart" and ma (Hardware)