From 989f9630a43fe0c6efab64ea36e8a0e909d97c19 Mon Sep 17 00:00:00 2001
From: "Jasper St. Pierre" <jstpierre@mecheye.net>
Date: Thu, 11 Jun 2015 21:10:28 -0400
Subject: [PATCH] input-settings-x11: Use xcb to change input settings

This way, we won't be hit with BadValue errors if we set it to a value
outside the X device's range. This can happen for touchpads without
two-finger scrolling, for instance.
---
 configure.ac                               | 1 +
 src/backends/x11/meta-input-settings-x11.c | 8 ++++++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 88d162a5c..b089a6616 100644
--- a/configure.ac
+++ b/configure.ac
@@ -93,6 +93,7 @@ MUTTER_PC_MODULES="
    xrender
    x11-xcb
    xcb-randr
+   xcb-xinput
 "
 
 GLIB_GSETTINGS
diff --git a/src/backends/x11/meta-input-settings-x11.c b/src/backends/x11/meta-input-settings-x11.c
index f683c4788..a1b46dded 100644
--- a/src/backends/x11/meta-input-settings-x11.c
+++ b/src/backends/x11/meta-input-settings-x11.c
@@ -30,7 +30,9 @@
 #include <gdk/gdkx.h>
 #include <X11/Xatom.h>
 #include <X11/extensions/XInput2.h>
+#include <X11/Xlib-xcb.h>
 #include <X11/XKBlib.h>
+#include <xcb/xinput.h>
 
 #include <meta/errors.h>
 
@@ -78,6 +80,7 @@ change_property (ClutterInputDevice *device,
 {
   MetaBackend *backend = meta_get_backend ();
   Display *xdisplay = meta_backend_x11_get_xdisplay (META_BACKEND_X11 (backend));
+  xcb_connection_t *xcb_conn = XGetXCBConnection (xdisplay);
   int device_id;
   Atom property_atom;
   guchar *data_ret;
@@ -89,8 +92,9 @@ change_property (ClutterInputDevice *device,
   if (!data_ret)
     return;
 
-  XIChangeProperty (xdisplay, device_id, property_atom, type,
-                    format, XIPropModeReplace, data, nitems);
+  xcb_input_xi_change_property (xcb_conn, device_id, XCB_PROP_MODE_REPLACE,
+                                format, property_atom, type,
+                                nitems, data);
   meta_XFree (data_ret);
 }