How to enable onboard in lightdm-gtk-greeter?

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http://askubuntu.com – Unity-greeter crashes, and constantly respawns, not letting me in. So, I configured auto login but that won't start anything except Unity session. I changed the lightdm.conf file to run Xubuntu but Unity still shows up. If I create a new user, it will start in Xubuntu just fine. I deleted my .conf XFCE prefs and that fixed nothing. I can at least get in to the gtk login greeter but then the onboard keyboard does not show up. If I could get the onboard keyboard in the gtk greeter, I would be super happy. The onboard keyboard shows up in the Unity greeter just fine. But not the gtk greeter. I (HowTos)