mouse: Use event driven mode for syndaemon

In default polling mode syndaemon wakeups 5 times per second. That
is pretty bad for power consumption with hungry laptop CPUs.

If syndaemon was compiled to include XRecord extension -R parameter
can be used to select even driven mode. Event driven mode wakeups
only when there is KeyPress or KeyRelease event. In that time CPU
is already running so impact for power consumption is lesser.

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>

https://bugzilla.gnome.org/show_bug.cgi?id=639623

plugins/mouse/gsd-mouse-manager.c

@@ -555,7 +555,7 @@ set_disable_w_typing (GsdMouseManager *manager, gboolean state)
 {
         if (state && touchpad_is_present ()) {
                 GError *error = NULL;
-                char *args[5];
+                char *args[6];
 
                 if (manager->priv->syndaemon_spawned)
                         return 0;
@@ -564,7 +564,8 @@ set_disable_w_typing (GsdMouseManager *manager, gboolean state)
                 args[1] = "-i";
                 args[2] = "2.0";
                 args[3] = "-k";
-                args[4] = NULL;
+                args[4] = "-R";
+                args[5] = NULL;
 
                 if (!g_find_program_in_path (args[0]))
                         return 0;