Hey what exatly this means? `Night-light feature is enabled also in GDM screen, see
here : Bug 785273 – Night-light feature : if enable it modify also GDM
for more info.
If you want to disable it please type this command:
sudo -u gdm dbus-launch --exit-with-session gsettings set org.gnome.settings-daemon.plugins.color night-light-enabled false`