Hi If you installed xscreensaver you will actually have 3 programs for power management:
systemd xfce4-power-manager and xcreensaver Is your suspend doesn't work correctly, try setting 'HandleLidSwitch=ignore' in /etc/systemd/logind.conf and after that 'sudo restart systemd-logind' because there is often a conflict between systemd and xfce4-power-manager. It is perfectly safe to remove xfce4-power-manager because systemd of xcreensaver will take over. I suggest you use just one of them, whichever works best on your laptop.
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