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Paste from Marco Trevisan (3v1n0) at Fri, 13 May 2016 15:05:26 +0000

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=== modificato file plugins/power/gsd-power-manager.c
--- plugins/power/gsd-power-manager.c 2015-10-22 09:04:20 +0000
+++ plugins/power/gsd-power-manager.c 2016-04-30 21:12:17 +0000
@@ -2842,6 +2842,20 @@
 }
 
 static void
+upower_kbd_signal_cb (GDBusProxy *proxy,
+                      const gchar *sender_name,
+                      const gchar *signal_name,
+                      GVariant *parameters,
+                      gpointer user_data)
+{
+        GsdPowerManager *manager = GSD_POWER_MANAGER (user_data);
+
+        if (g_strcmp0 (signal_name, "BrightnessChanged") == 0) {
+                g_variant_get (parameters, "(i)", &manager->priv->kbd_brightness_now);
+        }
+}
+
+static void
 power_keyboard_proxy_ready_cb (GObject             *source_object,
                                GAsyncResult        *res,
                                gpointer             user_data)
@@ -2859,6 +2873,9 @@
                 goto out;
         }
 
+        g_signal_connect (manager->priv->upower_kdb_proxy, "g-signal",
+                          G_CALLBACK (upower_kbd_signal_cb), manager);
+
         k_now = g_dbus_proxy_call_sync (manager->priv->upower_kdb_proxy,
                                         "GetBrightness",
                                         NULL,
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