From f4d5c8d99e9071efc54483f44b74a6d3c2a05214 Mon Sep 17 00:00:00 2001
From: Michael Lutz <michi@icosahedron.de>
Date: Sun, 25 Apr 2021 00:43:38 +0200
Subject: Fix: [OpenGL] Main loop expects to start with the video buffer
 unmapped. (#9100)

---
 src/video/sdl2_opengl_v.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/video/sdl2_opengl_v.cpp')

diff --git a/src/video/sdl2_opengl_v.cpp b/src/video/sdl2_opengl_v.cpp
index 9c84c36b1..003e19438 100644
--- a/src/video/sdl2_opengl_v.cpp
+++ b/src/video/sdl2_opengl_v.cpp
@@ -74,6 +74,8 @@ const char *VideoDriver_SDL_OpenGL::Start(const StringList &param)
 		this->Stop();
 		return "Can't get pointer to screen buffer";
 	}
+	/* Main loop expects to start with the buffer unmapped. */
+	this->ReleaseVideoPointer();
 
 	return nullptr;
 }
-- 
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