3 files changed, 15 insertions, 3 deletions
diff --git a/indra/llrender/llrender.cpp b/indra/llrender/llrender.cpp
index ee66122774..4d64dc9e10 100644
--- a/indra/llrender/llrender.cpp
+++ b/indra/llrender/llrender.cpp
@@ -857,7 +857,7 @@ LLRender::~LLRender()
 	shutdown();
 }
 
-void LLRender::init(bool needs_vertex_buffer)
+bool LLRender::init(bool needs_vertex_buffer)
 {
 #if LL_WINDOWS
     if (gGLManager.mHasDebugOutput && gDebugGL)
@@ -879,6 +879,13 @@ void LLRender::init(bool needs_vertex_buffer)
     // necessary for reflection maps
     glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
 
+#if LL_WINDOWS
+    if (glGenVertexArrays == nullptr)
+    {
+        return false;
+    }
+#endif
+
     { //bind a dummy vertex array object so we're core profile compliant
         U32 ret;
         glGenVertexArrays(1, &ret);
@@ -889,6 +896,7 @@ void LLRender::init(bool needs_vertex_buffer)
     {
         initVertexBuffer();
     }
+    return true;
 }
 
 void LLRender::initVertexBuffer()
diff --git a/indra/llrender/llrender.h b/indra/llrender/llrender.h
index fd922affba..716b52354d 100644
--- a/indra/llrender/llrender.h
+++ b/indra/llrender/llrender.h
@@ -375,7 +375,7 @@ public:
 
 	LLRender();
 	~LLRender();
-    void init(bool needs_vertex_buffer);
+    bool init(bool needs_vertex_buffer);
     void initVertexBuffer();
     void resetVertexBuffer();
 	void shutdown();
diff --git a/indra/newview/llviewerwindow.cpp b/indra/newview/llviewerwindow.cpp
index a89d535943..3eb485dfc8 100644
--- a/indra/newview/llviewerwindow.cpp
+++ b/indra/newview/llviewerwindow.cpp
@@ -1958,7 +1958,11 @@ LLViewerWindow::LLViewerWindow(const Params& p)
 	// Initialize OpenGL Renderer
 	LLVertexBuffer::initClass(mWindow);
 	LL_INFOS("RenderInit") << "LLVertexBuffer initialization done." << LL_ENDL ;
-	gGL.init(true);
+	if (!gGL.init(true))
+    {
+        LLError::LLUserWarningMsg::show(LLTrans::getString("MBVideoDrvErr"));
+        LL_ERRS() << "gGL not initialized" << LL_ENDL;
+    }
 
 	if (LLFeatureManager::getInstance()->isSafe()
 		|| (gSavedSettings.getS32("LastFeatureVersion") != LLFeatureManager::getInstance()->getVersion())