X11 Session Management

The session consists of three kinds of applications:

1. Things that autostart via XDG:

• pulseaudio,
• tracker components,
• rygel (need to provide the desktop file ourselves)

2. Things that are started using a session script:

• tracker itself

3. Main session application, in our case MEX:

• This is keeping the session alive; when it exists, the session is over, i.e.,
• Should respawn on crashes, so need a wrapper script which will be the last item in the X session to be started (and will be exec'ed)
• A specialized settopbox profile for MEX, e.g., so that the Off button shuts down the box, rather than the application.