Comment 0 for bug 1734908

1. Issue

The following issue was observed while running network-manager=1.8.4-1ubuntu3 autopkgtest on Artful:

-----------------------------------------------------------
Nov 21 17:00:32 autopkgtest systemd[1]: Starting Load/Save RF Kill Switch Status...
Nov 21 17:01:02 autopkgtest systemd[1]: systemd-rfkill.service: Start operation timed out. Terminating.
Nov 21 17:01:02 autopkgtest systemd[1]: Failed to start Load/Save RF Kill Switch Status.
Nov 21 17:01:02 autopkgtest systemd[1]: systemd-rfkill.service: Unit entered failed state.
Nov 21 17:01:02 autopkgtest systemd[1]: systemd-rfkill.service: Failed with result 'timeout'.
-----------------------------------------------------------

This happens after the testcase inserts the fake-rfkill module (a module shipped with network-manager tests that registers a new fake device with the rfkill subsystem).

2. How to reproduce

2.1. Download network-manager package source code
$ apt-get source network-manager

2.2. Run killswitches-no-urfkill testcase
$ cd network-manager-1.8.4
$ sudo ./debian/tests/killswitches-no-urfkill

3. Fix

The issue is fixed by the following systemd upstream patches:

-----------------------------------------------------------
https://github.com/systemd/systemd/commit/8ec1a07998758f6a85f3ea5bf2ed14d87609398f#diff-275947967677827e2b72930d97f1b8ac

commit 8ec1a07998758f6a85f3ea5bf2ed14d87609398f
Author: S. Fan <email address hidden>
Date: Mon Jul 31 05:10:10 2017 -0500

    rfkill: fix erroneous behavior when polling the udev monitor (#6489)

    Comparing udev_device_get_sysname(device) and sysname will always return
    true. We need to check the device received from udev monitor instead.

    Also, fd_wait_for_event() sometimes never exits. Better set a timeout
    here.
-----------------------------------------------------------

-----------------------------------------------------------
https://github.com/systemd/systemd/commit/c7f6ca9379279affa8f22d15fa13063491f86a49#diff-275947967677827e2b72930d97f1b8ac

commit c7f6ca9379279affa8f22d15fa13063491f86a49
Author: Xiang Fan <email address hidden>
Date: Wed Aug 9 05:51:53 2017 -0500

    rfkill: fix typo (#6574)
-----------------------------------------------------------

With the fixed, the output from systemd-rfkill is:

-----------------------------------------------------------
Nov 28 15:27:54 autopkgtest systemd[1]: Starting Load/Save RF Kill Switch Status...
Nov 28 15:27:59 autopkgtest systemd-rfkill[14843]: Timed out waiting for udev monitor.
Nov 28 15:27:59 autopkgtest systemd[1]: Started Load/Save RF Kill Switch Status.
-----------------------------------------------------------

The patches are needed to fix the ADT tests observed with Artful tests on ppc64el architecture:
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-artful/artful/ppc64el/n/network-manager/20171120_100719_28642@/log.gz