diff --git a/dix/getevents.c b/dix/getevents.c
index baa26c4b8..75708520f 100644
--- a/dix/getevents.c
+++ b/dix/getevents.c
@@ -35,6 +35,7 @@
 #include <X11/keysym.h>
 #include <X11/Xproto.h>
 #include <math.h>
+#include <limits.h>
 
 #include "misc.h"
 #include "resource.h"
@@ -756,6 +757,29 @@ clipAbsolute(DeviceIntPtr dev, ValuatorMask *mask)
     }
 }
 
+static void
+add_to_scroll_valuator(DeviceIntPtr dev, ValuatorMask *mask, int valuator, double value)
+{
+    double v;
+
+    if (!valuator_mask_fetch_double(mask, valuator, &v))
+        return;
+
+    /* protect against scrolling overflow. INT_MAX for double, because
+     * we'll eventually write this as 32.32 fixed point */
+    if ((value > 0 && v > INT_MAX - value) || (value < 0 && v < INT_MIN - value)) {
+        v = 0;
+
+        /* reset last.scroll to avoid a button storm */
+        valuator_mask_set_double(dev->last.scroll, valuator, 0);
+    }
+    else
+        v += value;
+
+    valuator_mask_set_double(mask, valuator, v);
+}
+
+
 /**
  * Move the device's pointer by the values given in @valuators.
  *
@@ -774,13 +798,17 @@ moveRelative(DeviceIntPtr dev, ValuatorMask *mask)
 
         if (!valuator_mask_isset(mask, i))
             continue;
-        val += valuator_mask_get_double(mask, i);
+
+        add_to_scroll_valuator(dev, mask, i, val);
+
         /* x & y need to go over the limits to cross screens if the SD
          * isn't currently attached; otherwise, clip to screen bounds. */
         if (valuator_get_mode(dev, i) == Absolute &&
-            ((i != 0 && i != 1) || clip_xy))
+            ((i != 0 && i != 1) || clip_xy)) {
+            val = valuator_mask_get_double(mask, i);
             clipAxis(dev, i, &val);
-        valuator_mask_set_double(mask, i, val);
+            valuator_mask_set_double(mask, i, val);
+        }
     }
 }
 
@@ -1506,6 +1534,7 @@ emulate_scroll_button_events(InternalEvent *events,
     return num_events;
 }
 
+
 /**
  * Generate a complete series of InternalEvents (filled into the EventList)
  * representing pointer motion, or button presses.  If the device is a slave
@@ -1560,7 +1589,7 @@ GetPointerEvents(InternalEvent *events, DeviceIntPtr pDev, int type,
      * necessary. This only needs to cater for the XIScrollFlagPreferred
      * axis (if more than one scrolling axis is present) */
     if (type == ButtonPress) {
-        double val, adj;
+        double adj;
         int axis;
         int h_scroll_axis = -1;
         int v_scroll_axis = -1;
@@ -1596,8 +1625,7 @@ GetPointerEvents(InternalEvent *events, DeviceIntPtr pDev, int type,
 
         if (adj != 0.0 && axis != -1) {
             adj *= pDev->valuator->axes[axis].scroll.increment;
-            val = valuator_mask_get_double(&mask, axis) + adj;
-            valuator_mask_set_double(&mask, axis, val);
+            add_to_scroll_valuator(pDev, &mask, axis, adj);
             type = MotionNotify;
             buttons = 0;
             flags |= POINTER_EMULATED;
diff --git a/include/xkbsrv.h b/include/xkbsrv.h
index a19c8fb29..d58478543 100644
--- a/include/xkbsrv.h
+++ b/include/xkbsrv.h
@@ -301,6 +301,11 @@ extern _X_EXPORT const char *XkbBinDirectory;
 extern _X_EXPORT CARD32 xkbDebugFlags;
 
 #define	_XkbLibError(c,l,d)     /* Epoch fail */
+
+/* "a" is a "unique" numeric identifier that just defines which error
+ * code statement it is. _XkbErrCode2(4, foo) means "this is the 4th error
+ * statement in this function". lovely.
+ */
 #define	_XkbErrCode2(a,b) ((XID)((((unsigned int)(a))<<24)|((b)&0xffffff)))
 #define	_XkbErrCode3(a,b,c)	_XkbErrCode2(a,(((unsigned int)(b))<<16)|(c))
 #define	_XkbErrCode4(a,b,c,d) _XkbErrCode3(a,b,((((unsigned int)(c))<<8)|(d)))
diff --git a/os/connection.c b/os/connection.c
index 039942f91..344147220 100644
--- a/os/connection.c
+++ b/os/connection.c
@@ -353,6 +353,7 @@ NotifyParentProcess(void)
 #if !defined(WIN32)
     if (dynamic_display[0]) {
         write(displayfd, dynamic_display, strlen(dynamic_display));
+        write(displayfd, "\n", 1);
         close(displayfd);
     }
     if (RunFromSmartParent) {
diff --git a/test/.gitignore b/test/.gitignore
index 5d4fdfa99..23d4c8f4f 100644
--- a/test/.gitignore
+++ b/test/.gitignore
@@ -1,4 +1,5 @@
 fixes
+hashtabletest
 input
 list
 misc
diff --git a/test/Makefile.am b/test/Makefile.am
index b2a53aa64..a5a2e5c2b 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -20,7 +20,7 @@ INCLUDES += -I$(top_srcdir)/hw/xfree86/parser \
 	-I$(top_srcdir)/hw/xfree86/i2c -I$(top_srcdir)/hw/xfree86/modes \
 	-I$(top_srcdir)/hw/xfree86/ramdac
 endif
-TEST_LDADD=libxservertest.la $(XORG_SYS_LIBS) $(XSERVER_SYS_LIBS)
+TEST_LDADD=libxservertest.la $(XORG_SYS_LIBS) $(XSERVER_SYS_LIBS) $(GLX_SYS_LIBS)
 
 if XORG
 if SPECIAL_DTRACE_OBJECTS
diff --git a/test/xi2/Makefile.am b/test/xi2/Makefile.am
index 913ba0f8b..9de7abf5d 100644
--- a/test/xi2/Makefile.am
+++ b/test/xi2/Makefile.am
@@ -18,7 +18,7 @@ TESTS_ENVIRONMENT = $(XORG_MALLOC_DEBUG_ENV)
 
 AM_CFLAGS = $(DIX_CFLAGS) @XORG_CFLAGS@
 INCLUDES = @XORG_INCS@
-TEST_LDADD=../libxservertest.la $(XORG_SYS_LIBS) $(XSERVER_SYS_LIBS)
+TEST_LDADD=../libxservertest.la $(XORG_SYS_LIBS) $(XSERVER_SYS_LIBS) $(GLX_SYS_LIBS)
 COMMON_SOURCES=protocol-common.h protocol-common.c
 
 if SPECIAL_DTRACE_OBJECTS