![]() The keypress itself is meaningless and has no effect on playing video in full screen. It basically exists of a small background script that simulates a minor user action (keypress Ctrl) if idle time exceeds a defined amount of time, thus preventing the computer to go asleep or blank the screen. Once you press it, it will show the current state in a message: ![]() You can switch it of or on (toggle) with a key combination. It exists of two small scripts that you should store together in one and the same folder. If you are looking for a solution to keep your computer awake like Caffeine does (should do), the solution below should work I tested it on 14.04. How to prevent the computer from falling asleep I suspect it is because idle time on Ubuntu is equivalent to the time there is no user activity detected via keyboard or mouse. I am not sure why Caffeine does not keep your computer awake.
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