Update manager does not start

[Alex Elzenaar]

Repro Steps:
1. Launch a terminal
2. Execute 'update-manager'

What is seen:

Traceback (most recent call last):
  File "/usr/bin/update-manager", line 115, in <module>
    app.start_update()
  File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 164, in start_update
    self._start_pane(UpdateProgress(self))
  File "/usr/lib/python3/dist-packages/UpdateManager/UpdateProgress.py", line 56, in __init__
    self.install_backend = get_backend(self.datadir, self.window_main)
  File "/usr/lib/python3/dist-packages/UpdateManager/backend/__init__.py", line 51, in get_backend
    from .InstallBackendAptdaemon import InstallBackendAptdaemon
  File "/usr/lib/python3/dist-packages/UpdateManager/backend/InstallBackendAptdaemon.py", line 11, in <module>
    from aptdaemon import client, errors
EOFError: EOF read where not expected

What is expected:
Update manager should launch.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: update-manager 1:0.173
ProcVersionSignature: Ubuntu 3.5.0-14.17-generic 3.5.3
Uname: Linux 3.5.0-14-generic i686
ApportVersion: 2.5.1-0ubuntu7
Aptdaemon:

Architecture: i386
Date: Sat Sep 22 14:30:14 2012
GsettingsChanges:
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'launch-time' b'1348280896'
 b'com.ubuntu.update-manager' b'show-details' b'true'
 b'com.ubuntu.update-manager' b'window-height' b'507'
 b'com.ubuntu.update-manager' b'window-width' b'500'
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: Upgraded to quantal on 2012-07-12 (72 days ago)

[Alex Elzenaar (albeetle)]

Workaround: Running apt-get seems to fix it.

[Launchpad Janitor (janitor)]

[Expired for update-manager (Ubuntu) because there has been no activity for 60 days.]