Lock on suspend with LightDM

I was reading the Arch Wiki on how to start a screen locker when suspend, but I can't get work light-locker for LightDM from my suspend@kevin.service looks like this: [Unit] Description=Screen Locker LightDM Before=suspend.target [Service] User=kevin Type=forking Environment=DISPLAY=:0 ExecStart=-/usr/bin/light-locker [Install] WantedBy=suspend.target After that I enable the service: # systemctl enable suspend@kevin.service Restarted, but when I suspend my laptop, and resume again, it just doesn't work, the status of suspend@kevin.service looks like this: ● suspend@kevin.service - Screen Locker LightDM Loaded: loaded (/etc/systemd/system/suspend@kevin.service; enabled; vendor preset: disabled) Active: inactive (dead) nov 17 12:08:37 arch-kevin light-locker: failed to commit changes to dconf: Error al lanzar («spawn») el comando «dbus-launch --autolaunch=6409fcf6b77741839c02aa4 nov 17 12:08:37 arch-kevin light-locker: failed to commit changes to dconf: Error al lanzar («spawn») el comando «dbus-launch --autolaunch=6409fcf6b77741839c02aa4 nov 17 12:08:37 arch-kevin light-locker: failed to commit changes to dconf: Error al lanzar («spawn») el comando «dbus-launch --autolaunch=6409fcf6b77741839c02aa4 nov 17 12:08:37 arch-kevin light-locker: failed to commit changes to dconf: Error al lanzar («spawn») el comando «dbus-launch --autolaunch=6409fcf6b77741839c02aa4 nov 17 12:08:37 arch-kevin light-locker: failed to commit changes to dconf: Error al lanzar («spawn») el comando «dbus-launch --autolaunch=6409fcf6b77741839c02aa4 nov 17 12:08:37 arch-kevin light-locker: failed to register with the message bus **PD:** I tried light-locker before in a terminal, typing: $ light-locker --debug Output: [gs_debug_init] gs-debug.c:106 (12:15:13): Debugging enabled [main] light-locker.c:126 (12:15:13): initializing light-locker 1.6.0 [main] light-locker.c:128 (12:15:13): lock after screensaver 5 [main] light-locker.c:129 (12:15:13): late locking 0 [main] light-locker.c:130 (12:15:13): lock on suspend 1 [init_session_id] gs-listener-dbus.c:1882 (12:15:13): Got session-id: /org/freedesktop/login1/session/c2 [init_session_id] gs-listener-dbus.c:1887 (12:15:13): Got sd-session-id: c2 [init_seat_path] gs-listener-dbus.c:1964 (12:15:13): Got seat: /org/freedesktop/DisplayManager/Seat0 [gs_listener_x11_acquire] gs-listener-x11.c:172 (12:15:13): ScreenSaver Registered [listener_dbus_handle_system_message] gs-listener-dbus.c:1084 (12:15:13): obj_path=/org/freedesktop/DBus interface=org.freedesktop.DBus method=NameAcquired destination=:1.34 And from another terminal or just closing lid and resuming, it shows me LightDM display, for unlock my session Any workaround for making this work?