While searching why my Computer freezes since I suspect VBox causing it after installing it, I searched the syslog file. Here I found the line,
Dec 21 22:13:19 beteigeuze gnome-session[2524]: WARNING: Failed to start app: Unable to start application: Kindprozess »/usr/lib/policykit-1-gnome/polkit-gnome-authentication-agent-1« konnte nicht ausgeführt werden (Datei oder Verzeichnis nicht gefunden) Dec 21 18:06:51 beteigeuze gnome-session[2576]: WARNING: Failed to start app: Unable to start application: Kindprozess »/usr/lib/policykit-1-gnome/polkit-gnome-authentication-agent-1« konnte nicht ausgeführt werden (Datei oder Verzeichnis nicht gefunden) Dec 21 22:20:22 beteigeuze gnome-session[2132]: WARNING: Failed to start app: Unable to start application: Kindprozess »/usr/lib/policykit-1-gnome/polkit-gnome-authentication-agent-1« konnte nicht ausgeführt werden (Datei oder Verzeichnis nicht gefunden) I don't get what caused the error. Anyone? Can't see a specific pattern. How can I help? uname -a Linux computer 3.8.0-34-generic #49~precise1-Ubuntu SMP Wed Nov 13 18:05:00 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to policykit-1-gnome in Ubuntu. https://bugs.launchpad.net/bugs/540247 Title: polkit-gnome-authentication-agent-1 not started at login Status in PolicyKit GNOME component: Invalid Status in “policykit-1-gnome” package in Ubuntu: Invalid Bug description: Binary package hint: gnome-system-tools When I click the Add button in User Settings, nothing happens, I'm not even presented with an authorization dialog. The only error indication I can find is that on starting, the application outputs the following string to stderr: (users-admin:2641): Liboobs-WARNING **: There was an unknown error communicating asynchronously with the backends: Malformed message was sent I can't perform any other actions either, such as deleting users or administer groups. ProblemType: Bug Architecture: amd64 CheckboxSubmission: c2d78d7690d0fab80ba77c674de4d6a9 CheckboxSystem: 90b928d283473e9c089e730778bbd3da Date: Wed Mar 17 14:20:44 2010 DistroRelease: Ubuntu 10.04 EcryptfsInUse: Yes InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027) NonfreeKernelModules: nvidia Package: gnome-system-tools 2.29.91-0ubuntu2 ProcVersionSignature: Ubuntu 2.6.32-16.25-generic SourcePackage: gnome-system-tools Uname: Linux 2.6.32-16-generic x86_64 To manage notifications about this bug go to: https://bugs.launchpad.net/policykit-1-gnome/+bug/540247/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp