I found the solution for this bug. KDE needs the package "polkit-kde-1" to popup the authorization dialog for system updates or network shares. It seems that the package does not install when installing the "kubuntu- desktop" meta package. Looks like a dependency problem in the packages.
Nevertheless, if you want to get rid of this bug, just install "polkit- kde-1" and all problems are gone. -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to kpackagekit in Ubuntu. https://bugs.launchpad.net/bugs/758592 Title: KPackageKit fails to obtain authentication To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kpackagekit/+bug/758592/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs