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The xrandr command is the one you are looking for. An example usage is: xrandr --output HDMI1 --auto --same-as LVDS1 You can have --left-of, --right-of. Run xrandr on its own to see the different outputs that are available.


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Use xrand command without args for view your output names and the supported resolutions. Once you have this informations, you can setup a screen like this (this is an example, there is a lot of others options): xrand --output <output> --mode <resolution> --right-of/--left-of <output> You can also just reactivate your screen with: xrand ...


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You can use -display :HOST:DISPLAY to chose display to apply dpms setting like this: xset -display :0 dpms force off


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The following lines appeared in udevadm monitor KERNEL[46578.184280] change /devices/pci0000:00/0000:00:02.0/drm/card0 (drm) UDEV [46578.195887] change /devices/pci0000:00/0000:00:02.0/drm/card0 (drm) when attaching a monitor to the VGA-Connector. So there might be a way to figure this out.


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I cant leave comments yet, but is the screen connected via VGA, DVI. HDMI (Type B). The problem may be elsewhere but if you have different display ports and have a different cable connect the screen just to check. Try lowering the resolution, do you get any Ghosting? Try Recommendations for your screen Model from Dell



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