# Pastebin wBgI8xs8
cheako@mx1:~/src/deb/xfce4-settings-4.16.0$ cat debian/patches/fix_xchangedeviceproperty.patch 
--- a/xfsettingsd/pointers.c
+++ b/xfsettingsd/pointers.c
@@ -53,6 +53,8 @@
 #define DEVICE_ENABLED "Device Enabled"
 #endif /* XI_PROP_ENABLED */
 
+#include <X11/extensions/XInput2.h>
+
 static void             xfce_pointers_helper_finalize                 (GObject            *object);
 static void             xfce_pointers_helper_syndaemon_stop           (XfcePointersHelper *helper);
 static void             xfce_pointers_helper_syndaemon_check          (XfcePointersHelper *helper);
@@ -877,7 +879,8 @@
             if (n_succeeds == n_items)
             {
                 gdk_x11_display_error_trap_push (gdk_display_get_default ());
-                XChangeDeviceProperty (xdisplay, device, prop, type, format,
+                XIChangeProperty (xdisplay, device->deviceid,
+                                       prop, type, format,
                                        PropModeReplace, data.c, n_items);
                 XSync (xdisplay, FALSE);
                 if (gdk_x11_display_error_trap_pop (gdk_display_get_default ()))