Comment 14 for bug 1190581

Well, since revision 2038, we can consider this bug practically fixed. LightDM now adds/removes seats dynamically following logind SeatNew()/SeatRemoved() signals, and also listens on logind seats' CanGraphical property changes.

However, I think there's a last case that should be tested --- and it could be the most critical, although least probable, one: systemd boots too fast that lightdm service is started before main graphics device is loaded. In this case, seat0 would start as CanGraphical=no, and then switch to CanGraphical=yes after graphics device is ready.

I'm not sure if lightdm at revision 2038 can handle this case.