[Bug 2150231] DpkgTerminalLog.txt.txt

[Guybrush88]

apport information

** Attachment added: "DpkgTerminalLog.txt.txt"
   https://bugs.launchpad.net/bugs/2150231/+attachment/5964987/+files/DpkgTerminalLog.txt.txt

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https://bugs.launchpad.net/bugs/2150231

Title:
  dbus error while upgrading software

Status in update-manager package in Ubuntu:
  New

Bug description:
  I got this traceback while installing some updates today on Lubuntu
  26.04:

  :~$ update-manager
  WARNING:root:can not import unity GI Namespace Dbusmenu not available
  ERROR:dbus.connection:Exception in handler for D-Bus signal:
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/dbus/connection.py", line 263, in maybe_handle_message
      self._handler(*args, **kwargs)
      ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/UpdateManager/Core/AlertWatcher.py", line 90, in _on_network_state_changed
      self._update_3g_state()
      ~~~~~~~~~~~~~~~~~~~~~^^
    File "/usr/lib/python3/dist-packages/UpdateManager/Core/AlertWatcher.py", line 96, in _update_3g_state
      on_3g = nm.is_active_connection_gsm_or_cdma()
    File "/usr/lib/python3/dist-packages/UpdateManager/Core/roam.py", line 174, in is_active_connection_gsm_or_cdma
      actives = self.get_dbus_property(
          self.proxy, self.NM_DBUS_IFACE, "ActiveConnections"
      )
    File "/usr/lib/python3/dist-packages/UpdateManager/Core/roam.py", line 169, in get_dbus_property
      property = props.Get(interface, property)
    File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 72, in __call__
      return self._proxy_method(*args, **keywords)
             ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 141, in __call__
      return self._connection.call_blocking(self._named_service,
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
                                            self._object_path,
                                            ^^^^^^^^^^^^^^^^^^
      ...<3 lines>...
                                            args,
                                            ^^^^^
                                            **keywords)
                                            ^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/dbus/connection.py", line 696, in call_blocking
      reply_message = self.send_message_with_reply_and_block(
          message, timeout)
  dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NoReply: Message recipient disconnected from message bus without replying
  ERROR:dbus.connection:Exception in handler for D-Bus signal:
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/dbus/bus.py", line 173, in activate_name_owner
      return self.get_name_owner(bus_name)
             ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/dbus/bus.py", line 348, in get_name_owner
      return self.call_blocking(BUS_DAEMON_NAME, BUS_DAEMON_PATH,
             ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                                BUS_DAEMON_IFACE, 'GetNameOwner',
                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                                's', (bus_name,))
                                ^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/dbus/connection.py", line 696, in call_blocking
      reply_message = self.send_message_with_reply_and_block(
          message, timeout)
  dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NameHasNoOwner: Could not get owner of name 'org.freedesktop.NetworkManager': no such name

  During handling of the above exception, another exception occurred:

  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/dbus/connection.py", line 263, in maybe_handle_message
      self._handler(*args, **kwargs)
      ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/UpdateManager/Core/AlertWatcher.py", line 90, in _on_network_state_changed
      self._update_3g_state()
      ~~~~~~~~~~~~~~~~~~~~~^^
    File "/usr/lib/python3/dist-packages/UpdateManager/Core/AlertWatcher.py", line 95, in _update_3g_state
      nm = NetworkManagerHelper()
    File "/usr/lib/python3/dist-packages/UpdateManager/Core/roam.py", line 162, in __init__
      self.proxy = self.bus.get_object(
                   ~~~~~~~~~~~~~~~~~~~^
          "org.freedesktop.NetworkManager", "/org/freedesktop/NetworkManager"
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      )
      ^
    File "/usr/lib/python3/dist-packages/dbus/bus.py", line 237, in get_object
      return self.ProxyObjectClass(self, bus_name, object_path,
             ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                                   introspect=introspect,
                                   ^^^^^^^^^^^^^^^^^^^^^^
                                   follow_name_owner_changes=follow_name_owner_changes)
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 250, in __init__
      self._named_service = conn.activate_name_owner(bus_name)
                            ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/dbus/bus.py", line 178, in activate_name_owner
      self.start_service_by_name(bus_name)
      ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/dbus/bus.py", line 273, in start_service_by_name
      return (True, self.call_blocking(BUS_DAEMON_NAME, BUS_DAEMON_PATH,
                    ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                                       BUS_DAEMON_IFACE,
                                       ^^^^^^^^^^^^^^^^^
                                       'StartServiceByName',
                                       ^^^^^^^^^^^^^^^^^^^^^
                                       'su', (bus_name, flags)))
                                       ^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/dbus/connection.py", line 696, in call_blocking
      reply_message = self.send_message_with_reply_and_block(
          message, timeout)
  dbus.exceptions.DBusException: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.NetworkManager was not provided by any .service files
  --- 
  ProblemType: Bug
  ApportVersion: 2.34.0-0ubuntu2
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: LXQt
  DistroRelease: Ubuntu 26.04
  GsettingsChanges:
   b'com.ubuntu.update-manager' b'launch-count' b'1'
   b'com.ubuntu.update-manager' b'launch-time' b'int64 1760725034'
  InstallationDate: Installed on 2025-09-09 (227 days ago)
  InstallationMedia: Lubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
  Package: update-manager 1:26.04.5
  PackageArchitecture: all
  ProcVersionSignature: Ubuntu 7.0.0-14.14-generic 7.0.0
  Tags: resolute
  Uname: Linux 7.0.0-14-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: N/A
  _MarkForUpload: True

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