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I just found https://www.opengl.org/discussion_boards/showthread.php/157014-Compiling-with-gcc, and I modified the code to get rid of the 100% CPU hog; it seems to work fine on Ubuntu 14.04 - simply run it from a terminal, draw your rectangle area, and the program will exit, printing the coordinates in the terminal: xrectsel.c: #include<stdio.h> ...


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Personally, I use terminal commands xgamma for contrast and occasionally xrandr for brightness (though mostly I use the native brightness setting - more on that later ). To change contrast with xgamma , do xgamma -gamma $1 Where $1 is a decimal value. It can be 1.5 or .5 , but the values above those values can be harsh on the eyes, so play with the ...


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Under System Settings, go to Power. From there you can untick 'Dim screen to save power'. This will prevent your screen from dimming when you're not using it.



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