With one of the last updates the reaction to when presisng the power button on
an Fujitsu Lifebook E756 changed. Whereas the notebook siwtched simply off
after completing the shutdown sequence before, it now reboots.

I have 2 different Tumbleweed Versions installed with the older one working as
desired (so I think I can eliminate the possibility of BIOS settings issues)

behaviour O.K.:
tslb:~ # cat /etc/issue
Welcome to openSUSE Tumbleweed 20180628 - Kernel \r (\l).

tslb:~ # uname -a
Linux tslb 4.17.3-1-default #1 SMP PREEMPT Tue Jun 26 06:45:20 UTC 2018
(e8dc1b5) x86_64 x86_64 x86_64 GNU/Linux


behaviour broken:
tslb:~ # cat /etc/issue
Welcome to openSUSE Tumbleweed 20180530 - Kernel \r (\l).

Linux tslb 4.16.12-1-default #1 SMP PREEMPT Fri May 25 18:40:19 UTC 2018
(39c7522) x86_64 x86_64 x86_64 GNU/Linux


all entries within /etc/systemd/logind.conf for both are at their default
values, XFCE's power management's setting for power button is 'power off' but
this happens too if no one is logged on.