bug#73859: lightdm

[Feng Shu]

I have tested and found that:


In lightdm-gtk-greeter, the following line run success and return no session.

   items = lightdm_get_sessions ();


But, in lightdm, the following function in liblightdm-gobject/session.c is not 
called:

/**
 * lightdm_get_sessions:
 *
 * Get the available sessions.
 *
 * Return value: (element-type LightDMSession) (transfer none): A list of 
#LightDMSession
 **/
GList *
lightdm_get_sessions (void)
{
    g_debug ("Run lightdm_get_sessions");
    update_sessions ();
    return local_sessions;
}


I do not know why, seem to very confuse.


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