trouble sending a signal with gdbus

[Mike Gorse]

Hi all,

I have this code to send a PropertiesChanged signal:

   builder = g_variant_builder_new (G_VARIANT_TYPE_ARRAY);
   invalidated_builder = g_variant_builder_new (G_VARIANT_TYPE ("as"));
   g_variant_builder_add (builder, "{sv}", "ScreenReaderEnabled",
                          g_variant_new_boolean (enabled));
   result = g_dbus_connection_emit_signal (app->session_bus, NULL, "/org/a11y/bus",
                                  "org.freedesktop.DBus", "PropertiesChanged",
                                  g_variant_new ("(sa{sv}as)", "org.a11y.Status",
                                                 builder,
                                                 invalidated_builder),
                                  &error);

Does anyone see a problem with the above? It reportedly does not send the 
signal on one person's system, although the g_dbus_connection_emit_signal 
returns TRUE and does not set an error. The signal is sent correctly on my 
system, so I'm very confused. I tried adding

   g_dbus_connection_flush (app->session_bus, NULL, NULL, NULL);

but this does not seem to help.

Thanks,
-Mike