seems like you are doing this inside a VM where you have already started a session / logged in? If so, because one gnome-session has run, you won't see it.
Try booting the VM and connecting from outside it without any session already running and without GDM set to autologin.
seems like you are doing this inside a VM where you have already started a session / logged in? If so, because one gnome-session has run, you won't see it.
Try booting the VM and connecting from outside it without any session already running and without GDM set to autologin.