From: Laércio de Sousa <lbsousajr@gmail.com>
Subject: xf86Bus.c: go further with legacy PCI bus probe for non-seat0 seats.
diff -up xorg-server-1.14.1/hw/xfree86/common/xf86Bus.c.orig xorg-server-1.14.1/hw/xfree86/common/xf86Bus.c
--- xorg-server-1.14.1/hw/xfree86/common/xf86Bus.c.orig	2013-04-17 03:07:39.000000000 -0300
+++ xorg-server-1.14.1/hw/xfree86/common/xf86Bus.c	2013-06-11 16:37:55.148417711 -0300
@@ -81,7 +81,7 @@ xf86CallDriverProbe(DriverPtr drv, Bool
     if (drv->platformProbe != NULL) {
         foundScreen = xf86platformProbeDev(drv);
     }
-    if (ServerIsNotSeat0())
+    if (ServerIsNotSeat0() && foundScreen)
         return foundScreen;
 #endif
 
@@ -201,7 +201,7 @@ xf86BusProbe(void)
 {
 #ifdef XSERVER_PLATFORM_BUS
     xf86platformProbe();
-    if (ServerIsNotSeat0())
+    if (ServerIsNotSeat0() && xf86_num_platform_devices > 0)
         return;
 #endif
 #ifdef XSERVER_LIBPCIACCESS