Hot answers tagged kde
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.
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 ...
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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