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The KDE application KRuler should fit the bill. To start KRuler, choose Graphics->KDE Screen Ruler from your K menu. The rotation buttons allow you to change it's orientation in steps of 90 degrees, or you can click your middle mouse button (if you have one) to change it to a vertical ruler.


3

You can specify the mode on the command line with xrandr. Use a resolution that divides evenly into your laptop's native resolution so that it will still look crisp. Something like 1600x900 should be a good fit for you. Unfortunately this resolution isn't available by default based on the output of xrandr. Therefore you need to manually add it. First ...


1

Your system policy prevents management of local virtualized systems. You should use su to run virt-manager, virsh --connect qemu:///system and any other virtualization-related task.



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