diff -rupN xorg-server-1.15.2/dix/devices.c xorg-server-1.15.2-fix/dix/devices.c
--- xorg-server-1.15.2/dix/devices.c	2014-06-27 02:48:02.000000000 +0200
+++ xorg-server-1.15.2-fix/dix/devices.c	2014-10-07 16:35:42.458846338 +0200
@@ -1473,7 +1473,6 @@ InitPtrFeedbackClassDeviceStruct(DeviceI
     PtrFeedbackPtr feedc;
 
     BUG_RETURN_VAL(dev == NULL, FALSE);
-    BUG_RETURN_VAL(dev->ptrfeed != NULL, FALSE);
 
     feedc = malloc(sizeof(PtrFeedbackClassRec));
     if (!feedc)
@@ -1517,7 +1516,6 @@ InitStringFeedbackClassDeviceStruct(Devi
     StringFeedbackPtr feedc;
 
     BUG_RETURN_VAL(dev == NULL, FALSE);
-    BUG_RETURN_VAL(dev->stringfeed != NULL, FALSE);
 
     feedc = malloc(sizeof(StringFeedbackClassRec));
     if (!feedc)
@@ -1554,7 +1552,6 @@ InitBellFeedbackClassDeviceStruct(Device
     BellFeedbackPtr feedc;
 
     BUG_RETURN_VAL(dev == NULL, FALSE);
-    BUG_RETURN_VAL(dev->bell != NULL, FALSE);
 
     feedc = malloc(sizeof(BellFeedbackClassRec));
     if (!feedc)
@@ -1576,7 +1573,6 @@ InitLedFeedbackClassDeviceStruct(DeviceI
     LedFeedbackPtr feedc;
 
     BUG_RETURN_VAL(dev == NULL, FALSE);
-    BUG_RETURN_VAL(dev->leds != NULL, FALSE);
 
     feedc = malloc(sizeof(LedFeedbackClassRec));
     if (!feedc)
@@ -1599,7 +1595,6 @@ InitIntegerFeedbackClassDeviceStruct(Dev
     IntegerFeedbackPtr feedc;
 
     BUG_RETURN_VAL(dev == NULL, FALSE);
-    BUG_RETURN_VAL(dev->intfeed != NULL, FALSE);
 
     feedc = malloc(sizeof(IntegerFeedbackClassRec));
     if (!feedc)