Only giving issue in testing. Stable working fine so far. But might just go ahead and remove/purge LightDM and put GDM on instead and see how that goes then. Just checked Synaptic. It's showing gdm3 now. So when get a chance will remove the LightDM and try that one out and see how it goes. When I get back on Stable I'll have to check and see what's on there also.