The password for /usr/bin/software-properties-kde isn't being accepted when I run in KDE I have added the current user to root and created a group called wheel, added current the user to it. and I am getting the following error message from command line when I run as su /usr/bin/software-properties-kde qt.qpa.screen: QXcbConnection: Could not connect to display Could not connect to any X display.
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