diff -ur xserver-cygwin-1.13.0-1.orig/hw/xwin/win.h xserver-cygwin-1.13.0-1/hw/xwin/win.h
--- xserver-cygwin-1.13.0-1.orig/hw/xwin/win.h	2012-12-10 15:19:42.093750000 +0100
+++ xserver-cygwin-1.13.0-1/hw/xwin/win.h	2012-12-10 15:27:40.031250000 +0100
@@ -595,6 +595,9 @@
     UnrealizeFontPtr UnrealizeFont;
 #endif
 
+    /* mouse polling */
+    BOOL bMousePollingTimerStoppedWhileMinimized;
+
 } winPrivScreenRec;
 
 #ifdef XWIN_MULTIWINDOWEXTWM
diff -ur xserver-cygwin-1.13.0-1.orig/hw/xwin/winmultiwindowwndproc.c xserver-cygwin-1.13.0-1/hw/xwin/winmultiwindowwndproc.c
--- xserver-cygwin-1.13.0-1.orig/hw/xwin/winmultiwindowwndproc.c	2012-12-10 15:19:42.140625000 +0100
+++ xserver-cygwin-1.13.0-1/hw/xwin/winmultiwindowwndproc.c	2012-12-10 15:26:50.359375000 +0100
@@ -415,6 +415,22 @@
 
         SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR) XMING_SIGNATURE);
 
+        /*
+         * Initialize variables for mouse polling in s_pScreenPriv.
+         * Need to initialize s_pSreenPriv first, as WIN_WINDOW_PROP
+         * was read before we set it in WM_CREATE 
+         */
+        if ((pWin = GetProp (hwnd, WIN_WINDOW_PROP)) != NULL)
+          {
+            /* Get a pointer to our window privates */
+            pWinPriv = winGetWindowPriv(pWin);
+            
+            /* Get pointers to our screen privates and screen info */
+            s_pScreenPriv = pWinPriv->pScreenPriv;
+            
+            s_pScreenPriv->bMousePollingTimerStoppedWhileMinimized = FALSE;
+  	}
+
         return 0;
 
     case WM_INIT_SYS_MENU:
@@ -1007,6 +1023,27 @@
         return 0;
 
     case WM_SIZE:
+        if(wParam == SIZE_MINIMIZED)
+          {
+            /* Kill the timer used to poll mouse events, if window gets minimized */
+            if (g_uipMousePollingTimerID != 0)
+              {
+                KillTimer (s_pScreenPriv->hwndScreen, WIN_POLLING_MOUSE_TIMER_ID);
+                g_uipMousePollingTimerID = 0;
+                s_pScreenPriv->bMousePollingTimerStoppedWhileMinimized = TRUE;
+              }
+          }
+        else
+          {
+            /* If timer was killed on minimize, restart it */
+            if(s_pScreenPriv->bMousePollingTimerStoppedWhileMinimized == TRUE)
+              {
+                s_pScreenPriv->bMousePollingTimerStoppedWhileMinimized = FALSE;
+                winStartMousePolling(s_pScreenPriv);
+              }
+          }
+
+
         /* see dix/window.c */
 #if CYGWINDOWING_DEBUG
     {
diff -ur xserver-cygwin-1.13.0-1.orig/hw/xwin/winwndproc.c xserver-cygwin-1.13.0-1/hw/xwin/winwndproc.c
--- xserver-cygwin-1.13.0-1.orig/hw/xwin/winwndproc.c	2012-12-10 15:19:42.187500000 +0100
+++ xserver-cygwin-1.13.0-1/hw/xwin/winwndproc.c	2012-12-10 15:20:52.703125000 +0100
@@ -139,6 +139,10 @@
 
             winInitNotifyIcon(s_pScreenPriv);
         }
+
+	/* initialize variables for mouse polling in s_pScreenPriv */
+	s_pScreenPriv->bMousePollingTimerStoppedWhileMinimized = FALSE;
+
         return 0;
 
     case WM_DISPLAYCHANGE: