From d8c1cad24547b955490b181216550d6e2bf84ec4 Mon Sep 17 00:00:00 2001
From: Zephyron <zephyron@citron-emu.org>
Date: Wed, 31 Dec 2025 16:57:34 +1000
Subject: [PATCH] fix(service/nvnflinger): implement GetBufferHistory to
 prevent game hangs

Return empty buffer history list instead of stubbing to allow games to
proceed past loading screens.

Signed-off-by: Zephyron <zephyron@citron-emu.org>
---
 src/core/hle/service/nvnflinger/buffer_queue_producer.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/core/hle/service/nvnflinger/buffer_queue_producer.cpp b/src/core/hle/service/nvnflinger/buffer_queue_producer.cpp
index 9e5091eeb..6e4dc24ea 100644
--- a/src/core/hle/service/nvnflinger/buffer_queue_producer.cpp
+++ b/src/core/hle/service/nvnflinger/buffer_queue_producer.cpp
@@ -922,9 +922,12 @@ void BufferQueueProducer::Transact(u32 code, std::span<const u8> parcel_data,
         status = SetBufferCount(buffer_count);
         break;
     }
-    case TransactionId::GetBufferHistory:
-        LOG_WARNING(Service_Nvnflinger, "(STUBBED) called, transaction=GetBufferHistory");
+    case TransactionId::GetBufferHistory: {
+        const u32 history_count = 0;
+
+        parcel_out.Write(history_count);
         break;
+    }
     default:
         ASSERT_MSG(false, "Unimplemented TransactionId {}", code);
         break;