Comment 27 for bug 250712

I saw the same thing "Traksius" reported a few comments above. I couldn't open any gui app w/ root priviledges with "gksudo" or "gksu". I could not open Synaptic from the menu after entering my password, either. However, after stopping networking, I could successfully use "gksudo", "gksu", and open Synaptic as root with no problems. If I restart networking and retry, the problem returns.

I installed "kubuntu-desktop" and signed into a KDE session. I successfully opened gui apps with "kdesudo". I rebooted and signed into a Gnome session. Again, "kdesudo" would work, but "gksudo" and "gksu" would not. I changed Synaptic in the menu to use "kdesudo" instead of "gksu" and can now open Synaptic with root priviledges, even without stopping networking.