Actually, it works for installing packages from software center (auth dialog appears), still fails silently sometimes (for example when I try to remove software source PPA).
I also created a new admin user, by running sudo gnome-control-center -> Users & Groups. For that user everything works fine. This appears to be a recurring bug which has been reported on Launchpad back in 2013. Every version of ubuntu since is affected by this but not everyone sees the error. On the moment I write this (march 2015) there's no permanent solution, however there are workarounds to solve the problem. For Ubuntu 14.10 the problem appears to be related to the package ulatencyd. Removing this package causes the error to disappear in my situation. If I recall correctly I've installed this package manually on a certain moment in time so it does not belong to a standard install and therefore this might not affect everyone. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1240336 Title: After release upgrade, the user looses permissions for several basic actions in the system Status in gdm package in Ubuntu: Triaged Status in lightdm package in Ubuntu: Triaged Status in lxdm package in Ubuntu: Triaged Status in policykit-desktop-privileges package in Ubuntu: Triaged Bug description: HOW TO REPRODUCE: - Upgrade Ubuntu to the next release. RESULT: - The user looses permissions for several basic actions in the system. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: policykit-desktop-privileges 0.16 ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3 Uname: Linux 3.11.0-12-generic x86_64 ApportVersion: 2.12.5-0ubuntu2 Architecture: amd64 Date: Tue Oct 15 20:20:55 2013 InstallationDate: Installed on 2013-10-09 (7 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Beta amd64 (20131008) MarkForUpload: True PackageArchitecture: all ProcEnviron: LANGUAGE=en_US TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: policykit-desktop-privileges UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm/+bug/1240336/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp