[Unit]
Description=GNOME Session Manager is ready
DefaultDependencies=no
RefuseManualStart=yes
RefuseManualStop=yes

Requisite=gnome-session-pre.target
After=gnome-session-pre.target

Requisite=gnome-session-initialized.target
PartOf=gnome-session-initialized.target
Before=gnome-session-initialized.target