Traceback (most recent call last):
  File "/usr/bin/jockey-gtk", line 281, in on_handler_changed
    if self.toggle_handler(self.model[path][0]):
  File "/usr/lib/python2.5/site-packages/jockey/ui.py", line 512, in toggle_handler
    handler_id, not en)
  File "/usr/lib/python2.5/site-packages/jockey/backend.py", line 116, in polkit_auth_wrapper
    return fn(*args, **kwargs)
  File "/usr/lib/python2.5/site-packages/jockey/backend.py", line 87, in dbus_sync_call_signal_wrapper
    raise _h_exception_exc
DBusException: org.freedesktop.DBus.Python.SystemError: Traceback (most recent call last):
  File "/var/lib/python-support/python2.5/dbus/service.py", line 696, in _message_cb
    retval = candidate_method(self, *args, **keywords)
  File "/usr/lib/python2.5/site-packages/jockey/backend.py", line 253, in set_enabled
    return h.enable()
  File "/usr/lib/python2.5/site-packages/jockey/handlers.py", line 428, in enable
    Handler.enable(self)
  File "/usr/lib/python2.5/site-packages/jockey/handlers.py", line 213, in enable
    self.backend.install_package(self.package)
  File "/usr/lib/python2.5/site-packages/jockey/backend.py", line 462, in install_package
    hasattr(self, '_locations') and self.install_progress or None)
  File "/usr/lib/python2.5/site-packages/jockey/oslib.py", line 211, in install_package
    progress_cb and MyInstallProgress(progress_cb) or None)
  File "/usr/lib/python2.5/site-packages/apt/cache.py", line 226, in commit
    res = self.installArchives(pm, installProgress)
  File "/usr/lib/python2.5/site-packages/apt/cache.py", line 201, in installArchives
    res = installProgress.run(pm)
  File "/usr/lib/python2.5/site-packages/apt/progress.py", line 216, in run
    res = pm.DoInstall(self.writefd)
SystemError: E:Sub-process /usr/bin/dpkg returned an error code (2)