opening "Repositories" dialog doesn't open the dialog but suggests reloading package sources immediately

[Karl-Philipp Richter]

On the console I see

    Traceback (most recent call last):
      File "/usr/lib/python3/dist-packages/dbus/bus.py", line 175, in activate_name_owner
        return self.get_name_owner(bus_name)
      File "/usr/lib/python3/dist-packages/dbus/bus.py", line 361, in get_name_owner
        's', (bus_name,), **keywords)
      File "/usr/lib/python3/dist-packages/dbus/connection.py", line 651, in call_blocking
        message, timeout)
    dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NameHasNoOwner: Could not get owner of name 'com.ubuntu.SoftwareProperties': no such name

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "/usr/bin/software-properties-gtk", line 101, in <module>
        app = SoftwarePropertiesGtk(datadir=options.data_dir, options=options, file=file)
      File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 141, in __init__
        proxy = bus.get_object("com.ubuntu.SoftwareProperties", "/")
      File "/usr/lib/python3/dist-packages/dbus/bus.py", line 241, in get_object
        follow_name_owner_changes=follow_name_owner_changes)
      File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 248, in __init__
        self._named_service = conn.activate_name_owner(bus_name)
      File "/usr/lib/python3/dist-packages/dbus/bus.py", line 180, in activate_name_owner
        self.start_service_by_name(bus_name)
      File "/usr/lib/python3/dist-packages/dbus/bus.py", line 278, in start_service_by_name
        'su', (bus_name, flags)))
      File "/usr/lib/python3/dist-packages/dbus/connection.py", line 651, in call_blocking
        message, timeout)
    dbus.exceptions.DBusException: org.freedesktop.DBus.Error.Spawn.ExecFailed: Failed to execute program com.ubuntu.SoftwareProperties: Permission denied
    Traceback (most recent call last):
      File "/usr/lib/python3/dist-packages/dbus/bus.py", line 175, in activate_name_owner
        return self.get_name_owner(bus_name)
      File "/usr/lib/python3/dist-packages/dbus/bus.py", line 361, in get_name_owner
        's', (bus_name,), **keywords)
      File "/usr/lib/python3/dist-packages/dbus/connection.py", line 651, in call_blocking
        message, timeout)
    dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NameHasNoOwner: Could not get owner of name 'com.ubuntu.SoftwareProperties': no such name

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "/usr/bin/software-properties-gtk", line 101, in <module>
        app = SoftwarePropertiesGtk(datadir=options.data_dir, options=options, file=file)
      File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 141, in __init__
        proxy = bus.get_object("com.ubuntu.SoftwareProperties", "/")
      File "/usr/lib/python3/dist-packages/dbus/bus.py", line 241, in get_object
        follow_name_owner_changes=follow_name_owner_changes)
      File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 248, in __init__
        self._named_service = conn.activate_name_owner(bus_name)
      File "/usr/lib/python3/dist-packages/dbus/bus.py", line 180, in activate_name_owner
        self.start_service_by_name(bus_name)
      File "/usr/lib/python3/dist-packages/dbus/bus.py", line 278, in start_service_by_name
        'su', (bus_name, flags)))
      File "/usr/lib/python3/dist-packages/dbus/connection.py", line 651, in call_blocking
        message, timeout)
    dbus.exceptions.DBusException: org.freedesktop.DBus.Error.Spawn.ExecFailed: Failed to execute program com.ubuntu.SoftwareProperties: Permission denied

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: synaptic 0.81.4build2
Uname: Linux 4.3.0-040300-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Nov 30 20:18:02 2015
InstallationDate: Installed on 2013-10-17 (774 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: synaptic
UpgradeStatus: Upgraded to wily on 2015-11-19 (11 days ago)

[masand (markus-sand)]

Get the same error behaviour with the same traceback.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.