On reauthentication, ask logout if there's an existing session
This is part of gdm!233 (merged).
This depends on gnome-session!105 (merged) when starting a new session just after stopping the conflicting one.
This fixes 8th item of gnome-remote-desktop#180. And also gdm#900 (closed).
On a login session, when it is found a conflicting opened session when opening a session, a dialog based on this mockup is displayed.
When the user selects to stop the existing session, the method StopConflictingSession, at GDM greeter interface will be called, which will make GDM shutdown the existing session. Then after waiting 2 seconds for the existing session to be stopped, the new session is started.
Here there's a video that shows the current behaviour:
Edited by Ray Strode