From b38a45e784a06e5f4db089cd1f6874d91373cd9d Mon Sep 17 00:00:00 2001
From: Michalis Kamburelis <michalis.kambi@gmail.com>
Date: Mon, 22 Dec 2025 18:04:05 +0100
Subject: [PATCH] Avoid using memory mapping on AMD

---
 src/PasVulkan.Framework.pas | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/PasVulkan.Framework.pas b/src/PasVulkan.Framework.pas
index 26d0d640d..a0b61ebaa 100644
--- a/src/PasVulkan.Framework.pas
+++ b/src/PasVulkan.Framework.pas
@@ -16265,9 +16265,14 @@ function TpvVulkanDeviceMemoryStaging.Download(const aTransferQueue:TpvVulkanQue
     Source:Pointer;
     Destination:PpvUInt8;
     VkBufferCopy:TVkBufferCopy;
+    EnableMemoryMap:boolean;
 begin
+ { Using Move for memory-mapped buffer causes hands at AMD. }
+ EnableMemoryMap:=Device.PhysicalDevice.Properties.vendorID<>
+  TpvUInt32(TpvVulkanVendorID.AMD);
 
- if (TpvVulkanBufferFlag.PersistentMapped in aSourceBuffer.fBufferFlags) and
+ if EnableMemoryMap and
+    (TpvVulkanBufferFlag.PersistentMapped in aSourceBuffer.fBufferFlags) and
     ((aSourceBuffer.fMemoryPropertyFlags and TVkMemoryPropertyFlags(VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT))<>0) then begin
 
   Source:=aSourceBuffer.Memory.MapMemory;