[Bug 1400203] Re: libsystemd-login sd_login_monitor_new not working

[Brian Bloniarz]

Based on this bug: https://bugs.launchpad.net/ubuntu/+source/update-
manager/+bug/1376612 , this is not a regression; the same error occurs
in earlier versions of the package too.

** Tags removed: verification-failed verification-needed
** Tags added: verification-done

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Title:
  libsystemd-login sd_login_monitor_new not working

Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Utopic:
  Fix Committed

Bug description:
  [Impact]
  The systemd login monitoring library (API: sd_login_monitor_new(3)) is not
  functional in Utopic. This library is a dependency in NetworkManager, for
  tracking user sessions. As a result, my laptop does not reconnect to
  the network after a suspend/resume cycle.

  There was a patch to fix this in the older, Trusty Tahr version of systemd
  (http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/trusty/systemd/trusty/view/head:/debian/patches/login-monitor-no-machine.patch).
  The patch isn't in the utopic systemd (208-8ubuntu8).

  This was discovered in a Gnome Fallback session, but I think this KDE issue
  may be the same thing: https://bugs.kde.org/show_bug.cgi?id=340568
  Note: This behavior is only seen when "All users may connect to this
  network" is un-selected in NetworkManager.
  NOTE: in order to get a fully working network, I also had to make a
  change to the upstart script, see:
  https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1400205

  [Test Case]
  A short C program to demonstrate sd_login_monitor_new is attached to the
  bug, to demonstrate whether sd_login_monitor_new() is working. 

  To do an end-to-end test, you can stop NetworkManager, re-run it with
  "NetworkManager --no-daemon", and look for the "Error getting login
  monitor:" error message.

  [Regression Potential]
  Fixing this simply means applying a patch which shipped along with
  Trusty Tahr's systemd. Since it was widely used already, adding it to
  Utopic does not appear overly risky.

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