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You need to look at xrandr command May be something like: xrandr --output SCREEN1 --output SCREEN2 --output SCREEN3 --same-as SCREEN2 where SCREEN3 mirrors SCREEN2. Replace SCREEN1, SCREEN2, SCREEN3 with the appropriate name that you get with the xrandr command (without any option). For example, LDVS1, HDMI1, VGA1, etc ...


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I believe that it's the difference between calibration and characterization profiles described here: What's the difference between calibration and characterization? More info here: Missing information for whole-screen color correction? Unfortunately, many vendor-supplied ICC profiles do not include the information required for whole-screen color ...


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I can suggest two possible options: Using the special function key on your keyboard (e.g. Fn+F8) to switch between using one or the other or both Session Menu > System Settings > Hardware / Displays


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you can use xrandr command xrandr This is mine Screen 0: minimum 8 x 8, current 2646 x 1024, maximum 16384 x 16384 DVI-I-0 disconnected (normal left inverted right x axis y axis) DVI-I-1 connected 1366x768+1280+57 (normal left inverted right x axis y axis) 410mm x 230mm 1366x768 59.8*+ 1280x720 60.0 1024x768 75.0 60.0 ...



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