I solved the problem. Just open a terminal and type: sudo dpkg --configure -a
and then: sudo aptitude install -f and then reboot. I solved this way. Anyway there's a workaround if you want to update your system just type in a terminal: kdesudo kpackagekit and then update it normally, hope this helps :) -- 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