diff -r ac809ea54d63 src/video/x11/SDL_x11xinput2.c
--- a/src/video/x11/SDL_x11xinput2.c	Mon Dec 16 10:03:26 2013 -0300
+++ b/src/video/x11/SDL_x11xinput2.c	Mon Dec 16 21:24:38 2013 +0100
@@ -125,9 +125,39 @@
 X11_HandleXinput2Event(SDL_VideoData *videodata,XGenericEventCookie *cookie)
 {
 #if SDL_VIDEO_DRIVER_X11_XINPUT2
+
+#if SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH
+    double window_w = 1.0;
+    double window_h = 1.0;
+#endif
+
     if(cookie->extension != xinput2_opcode) {
         return 0;
     }
+
+#if SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH
+    /* Get Width and Heigh of the Window the event belongs to.
+     * Then, normalize the position (event_x, event_y).
+     * Notice that the event may belong to a Window and be outside of it.
+     * If so, the normalized coordinates are <0 or >1.
+     * (0, 0) is the upper left corner of the window.
+     */
+    if (cookie->evtype == XI_TouchBegin || cookie->evtype == XI_TouchEnd || cookie->evtype == XI_TouchUpdate) {
+        const XIDeviceEvent *xev = (const XIDeviceEvent *) cookie->data;
+        int i = 0;
+
+        for (i = 0; i < videodata->numwindows; i++) {
+            const SDL_WindowData *window_data = videodata->windowlist[i];
+            
+            if (window_data->xwindow == xev->event) {
+                window_w = window_data->window->w;
+                window_h = window_data->window->h;
+                break;
+            }
+        }
+    }
+#endif
+
     switch(cookie->evtype) {
         case XI_RawMotion: {
             const XIRawEvent *rawev = (const XIRawEvent*)cookie->data;
@@ -148,21 +178,21 @@
         case XI_TouchBegin: {
             const XIDeviceEvent *xev = (const XIDeviceEvent *) cookie->data;
             SDL_SendTouch(xev->sourceid,xev->detail,
-                      SDL_TRUE, xev->event_x, xev->event_y, 1.0);
+                      SDL_TRUE, xev->event_x / window_w, xev->event_y / window_h, 1.0);
             return 1;
             }
             break;
         case XI_TouchEnd: {
             const XIDeviceEvent *xev = (const XIDeviceEvent *) cookie->data;
             SDL_SendTouch(xev->sourceid,xev->detail,
-                      SDL_FALSE, xev->event_x, xev->event_y, 1.0);
+                      SDL_FALSE, xev->event_x / window_w, xev->event_y / window_h, 1.0);
             return 1;
             }
             break;
         case XI_TouchUpdate: {
             const XIDeviceEvent *xev = (const XIDeviceEvent *) cookie->data;
             SDL_SendTouchMotion(xev->sourceid,xev->detail,
-                                xev->event_x, xev->event_y, 1.0);
+                                xev->event_x / window_w, xev->event_y / window_h, 1.0);
             return 1;
             }
             break;