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I installed the KDE window manager on top of Ubuntu 11.10 and while I am using KDE, I do not get an elevation dialog when I try to perform tasks that require root privileges. Instead, the operations silently fail, unless I launch apps from a terminal, in which case I get errors like:

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/softwareproperties/gtk/", line 649, in on_isv_source_toggled
  File "/usr/lib/python2.7/dist-packages/dbus/", line 143, in __call__
  File "/usr/lib/python2.7/dist-packages/dbus/", line 630, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: com.ubuntu.SoftwareProperties.PermissionDeniedByPolicy: com.ubuntu.softwareproperties.applychanges

Or from the muon package manager, an error dialog such as:

enter image description here

Does anyone know what I need to do to fix this, so that I get a proper dialog asking for elevation? Otherwise, I have to start each app that may need root privs with sudo from a terminal or gksudo.


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up vote 4 down vote accepted

Do you have the polkit-kde-1 installed ?

A bug report:

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Installing it, followed by a reboot solved the problem. Thanks! Why isn't this a mandatory update for KDE users, yet? – Michael Goldshteyn Nov 18 '11 at 20:06

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