Still battling the ignite system. During set up there is a section "cable or Satellite Contril Test". I think I have a Arris Xi6-T box (please confirm) when will this box be an option in "search model number field?
I've been reading this thread and am still unclear as to exactly what you are trying to get working. Did you install the "Xfinity Stream" app on your Samsung TV and is this what you are trying to get working with Ignite TV?