title: org.gnome.SessionManager in Ubuntu 12.04 chroot
body: <p>I'm trying to test totem in a minimal chroot (host and chroot both ubuntu 12.04 amd64).  When I load a video, I get the error</p>
  
  <pre><code>** (totem:25660): WARNING **: Problem inhibiting the screensaver: GDBus.Error:
  org.freedesktop.DBus.Error.NameHasNoOwner: Name "org.gnome.SessionManager" does not exist
  </code></pre>
  
  <p>Indeed, the screen will turn off (session idle) while watching a video.  To confirm, I tested with python:</p>
  
  <pre><code>&gt;&gt;&gt; import dbus
  &gt;&gt;&gt; bus = dbus.SessionBus()
  &gt;&gt;&gt; bus.get_object('org.gnome.SessionManager','/org/gnome/SessionManager')
  </code></pre>
  
  <p>and get the error</p>
  
  <pre><code>dbus.exceptions.DBusException: org.freedesktop.DBus.Error.ServiceUnknown: The name
  org.gnome.SessionManager was not provided by any .service files
  </code></pre>
  
  <p>Does anyone know what packages would provide the dbus interface org.gnome.SessionManager in a chroot?  After searching on this, I've tried gnome-session, gnome-session-common and gnome-session-bin to no avail.</p>
  
  <p>By searching on <a href="http://packages.ubuntu.com" rel="nofollow">packages.ubuntu.com</a> and on a full 12.04 system where these both work correctly, there doesn't appear to be any package providing a file named org.gnome.SessionManager.service, so what .service file is it looking for?. </p>