New answers tagged monitors
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.
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 ...
You can use -display :HOST:DISPLAY to chose display to apply dpms setting like this: xset -display :0 dpms force off
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.
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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