Hi, On my system, Debian/Sid using systemd and xfce4, I have solved the issue of no working lightdm and xfce4 buttons.
As I already mentioned in Message #203, the xfce4 issue is fixed by upgrading policykit-1 to version 0.112-2 (experimental). The issue of the disappeared lightdm buttons is fixed by installing some rules in /etc/polkit-1/rules.d, enabling shutdown/restart/suspend/hibernate, see the attached file. Regards, Jos v.W.
99-lightdm-powerbuttons.rules
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