[reactos] 08/09: [VIDEOPRT] Do not attach secondary devices to the device stack

[Timo Kreuzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=49c16e661acf0d73f1b9b…

commit 49c16e661acf0d73f1b9b475dce8ab1271ccb2d3
Author:     Timo Kreuzer <timo.kreuzer(a)reactos.org>
AuthorDate: Sun Jul 4 20:26:32 2021 +0200
Commit:     Hervé Poussineau <hpoussin(a)reactos.org>
CommitDate: Sat Jul 10 16:27:44 2021 +0200

    [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);