From 49c16e661acf0d73f1b9b475dce8ab1271ccb2d3 Mon Sep 17 00:00:00 2001
From: Timo Kreuzer <timo.kreuzer@reactos.org>
Date: Sun, 4 Jul 2021 20:26:32 +0200
Subject: [PATCH] [VIDEOPRT] Do not attach secondary devices to the device
 stack

This fixes display on the primary screen.
---
 win32ss/drivers/videoprt/videoprt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/win32ss/drivers/videoprt/videoprt.c b/win32ss/drivers/videoprt/videoprt.c
index e36e0ce6c7c..c0a1d446116 100644
--- a/win32ss/drivers/videoprt/videoprt.c
+++ b/win32ss/drivers/videoprt/videoprt.c
@@ -298,7 +298,7 @@ IntVideoPortCreateAdapterDeviceObject(
     KeInitializeMutex(&DeviceExtension->DeviceLock, 0);
 
     /* Attach the device. */
-    if (PhysicalDeviceObject != NULL)
+    if ((PhysicalDeviceObject != NULL) && (DisplayNumber == 0))
         DeviceExtension->NextDeviceObject = IoAttachDeviceToDeviceStack(
                                                 *DeviceObject,
                                                 PhysicalDeviceObject);