Comment # 8 on bug 1012883 from Franck Bui

(In reply to Kyaw Thu Soe from comment #7)
> I will permanently set log level to debug from now on.

Unfortunately, that won't really help as systemd doesnt show the hanging
processes that prevents the user session to be closed hence to shutdown the
system even in debug mode.

However I built a test package that includes such traces which will help us to
identify the culprit (hopefully).

Could you install the following repo on your affected system and try to
reproduce ?

In order to do that, please do:

zypper ar
http://download.opensuse.org/repositories/home:/fbui:/branches:/openSUSE:/Factory:/bsc-1012883/openSUSE_Tumbleweed/home:fbui:branches:openSUSE:Factory:bsc-1012883.repo
systemd-with-debug-trace
zypper dup --repo systemd-with-debug-trace

Also make sure to have the journal in persistent mode:
mkdir -p /var/log/journal

and then reboot until you can reproduce the issue.

Once done please show the content of the journal of the previous boot
(journalctl -b -1 and search for the "FOO" string).

Thanks.