diff --git a/plugins/GSdx/CMakeLists.txt b/plugins/GSdx/CMakeLists.txt
index 5fa1f3b991..51cf2e5b49 100644
--- a/plugins/GSdx/CMakeLists.txt
+++ b/plugins/GSdx/CMakeLists.txt
@@ -19,7 +19,8 @@ set(CommonFlags
     -std=c++0x
     -fno-strict-aliasing
     -DOGL_DEBUG # FIXME remove me when code is ready
-    -DAMD_DRIVER_WORKAROUND
+    # Unload of Geometry shader was fixed in Cat 12.3 (ie OpenGL version string: 4.2.11554)
+    #-DAMD_DRIVER_WORKAROUND
     )
 
 set(OptimizationFlags
diff --git a/plugins/GSdx/GS.cpp b/plugins/GSdx/GS.cpp
index 8c448348fc..df1a20fdc5 100644
--- a/plugins/GSdx/GS.cpp
+++ b/plugins/GSdx/GS.cpp
@@ -1269,6 +1269,13 @@ EXPORT_C GSReplay(char* lpszCmdLine, int renderer)
 
 	::SetPriorityClass(::GetCurrentProcess(), HIGH_PRIORITY_CLASS);
 #endif
+	// Allow to easyly switch between SW/HW renderer
+	renderer = theApp.GetConfig("renderer", 12);
+	if (renderer != 12 && renderer != 13)
+	{
+		fprintf(stderr, "wrong renderer selected %d\n", renderer);
+		return;
+	}
 
 	if(FILE* fp = fopen(lpszCmdLine, "rb"))
 	{
diff --git a/plugins/GSdx/GSDeviceOGL.cpp b/plugins/GSdx/GSDeviceOGL.cpp
index 40ecf105ca..914cebd66f 100644
--- a/plugins/GSdx/GSDeviceOGL.cpp
+++ b/plugins/GSdx/GSDeviceOGL.cpp
@@ -488,7 +488,9 @@ void GSDeviceOGL::Flip()
 {
 	// FIXME: disable it when code is working
 	CheckDebugLog();
+
 	m_wnd->Flip();
+
 #ifdef PRINT_FRAME_NUMBER
 	fprintf(stderr, "Draw %d (Frame %d)\n", g_draw_count, g_frame_count);
 #endif
@@ -498,6 +500,33 @@ void GSDeviceOGL::Flip()
 #endif
 }
 
+void GSDeviceOGL::DebugBB()
+{
+	bool dump_me = false;
+	uint32 start = theApp.GetConfig("debug_ogl_dump", 0);
+	uint32 length = theApp.GetConfig("debug_ogl_dump_length", 5);
+	if ( (start != 0 && g_frame_count >= start && g_frame_count < (start + length)) ) dump_me = true;
+
+	if (!dump_me) return;
+
+	GLuint fbo_old = m_state.fbo;
+	OMSetFBO(m_fbo);
+
+	GSVector2i size = m_backbuffer->GetSize();
+	GSTexture* rt = CreateRenderTarget(size.x, size.y, false);
+
+	static_cast<GSTextureOGL*>(rt)->Attach(GL_COLOR_ATTACHMENT0);
+
+	glBlitFramebuffer(0, 0, size.x, size.y,
+			0, 0, size.x, size.y,
+			GL_COLOR_BUFFER_BIT, GL_NEAREST);
+
+	rt->Save(format("/tmp/out_f%d__d%d__bb.bmp", g_frame_count, g_draw_count));
+
+	delete rt;
+	OMSetFBO(fbo_old);
+}
+
 void GSDeviceOGL::DebugInput()
 {
 	bool dump_me = false;
@@ -505,21 +534,21 @@ void GSDeviceOGL::DebugInput()
 	uint32 length = theApp.GetConfig("debug_ogl_dump_length", 5);
 	if ( (start != 0 && g_frame_count >= start && g_frame_count < (start + length)) ) dump_me = true;
 
-	if ( dump_me ) {
-		for (auto i = 0 ; i < 3 ; i++) {
-			if (m_state.ps_srv[i] != NULL) {
-				m_state.ps_srv[i]->Save(format("/tmp/in_f%d__d%d__%d.bmp", g_frame_count, g_draw_count, i));
-			}
-		}
-		//if (m_state.rtv != NULL) m_state.rtv->Save(format("/tmp/target_f%d__d%d__tex.bmp", g_frame_count, g_draw_count));
-		//if (m_state.dsv != NULL) m_state.dsv->Save(format("/tmp/ds_in_%d.bmp", g_draw_count));
+	if (!dump_me) return;
 
-		fprintf(stderr, "Draw %d (Frame %d)\n", g_draw_count, g_frame_count);
-		fprintf(stderr, "vs: %d ; gs: %d ; ps: %d\n", m_state.vs, m_state.gs, m_state.ps);
-		m_state.vb->debug();
-		m_state.bs->debug();
-		m_state.dss->debug();
+	for (auto i = 0 ; i < 3 ; i++) {
+		if (m_state.ps_srv[i] != NULL) {
+			m_state.ps_srv[i]->Save(format("/tmp/in_f%d__d%d__%d.bmp", g_frame_count, g_draw_count, i));
+		}
 	}
+	//if (m_state.rtv != NULL) m_state.rtv->Save(format("/tmp/target_f%d__d%d__tex.bmp", g_frame_count, g_draw_count));
+	//if (m_state.dsv != NULL) m_state.dsv->Save(format("/tmp/ds_in_%d.bmp", g_draw_count));
+
+	fprintf(stderr, "Draw %d (Frame %d)\n", g_draw_count, g_frame_count);
+	fprintf(stderr, "vs: %d ; gs: %d ; ps: %d\n", m_state.vs, m_state.gs, m_state.ps);
+	m_state.vb->debug();
+	m_state.bs->debug();
+	m_state.dss->debug();
 }
 
 void GSDeviceOGL::DebugOutput()
@@ -531,17 +560,17 @@ void GSDeviceOGL::DebugOutput()
 	uint32 length = theApp.GetConfig("debug_ogl_dump_length", 5);
 	if ( (start != 0 && g_frame_count >= start && g_frame_count < (start + length)) ) dump_me = true;
 
-	if ( dump_me ) {
-		if (m_state.rtv == m_backbuffer) {
-			if (m_state.rtv != NULL) m_state.rtv->Save(format("/tmp/out_f%d__d%d__back.bmp", g_frame_count, g_draw_count));
-		} else {
-			if (m_state.rtv != NULL) m_state.rtv->Save(format("/tmp/out_f%d__d%d__tex.bmp", g_frame_count, g_draw_count));
-		}
-		//if (m_state.dsv != NULL) m_state.dsv->Save(format("/tmp/ds_out_%d.bmp", g_draw_count));
-
-		fprintf(stderr, "\n");
+	if (!dump_me) return;
 
+	if (m_state.rtv == m_backbuffer) {
+		m_state.rtv->Save(format("/tmp/out_f%d__d%d__back.bmp", g_frame_count, g_draw_count));
+	} else {
+		if (m_state.rtv != NULL) m_state.rtv->Save(format("/tmp/out_f%d__d%d__tex.bmp", g_frame_count, g_draw_count));
 	}
+	//if (m_state.dsv != NULL) m_state.dsv->Save(format("/tmp/ds_out_%d.bmp", g_draw_count));
+
+	fprintf(stderr, "\n");
+	//DebugBB();
 }
 
 void GSDeviceOGL::DrawPrimitive()
@@ -580,6 +609,7 @@ void GSDeviceOGL::DrawIndexedPrimitive(int offset, int count)
 #endif
 
 	m_state.vb->DrawIndexedPrimitive(offset, count);
+
 #ifdef OGL_DEBUG
 	DebugOutput();
 	g_draw_count++;
@@ -601,7 +631,6 @@ void GSDeviceOGL::ClearRenderTarget(GSTexture* t, const GSVector4& c)
 		// FIXME1 I need to clarify this FBO attachment stuff
 		// I would like to avoid FBO for a basic clean operation
 		OMSetFBO(m_fbo);
-		glDrawBuffer(GL_COLOR_ATTACHMENT0);
 		static_cast<GSTextureOGL*>(t)->Attach(GL_COLOR_ATTACHMENT0);
 		glClearBufferfv(GL_COLOR, 0, c.v);
 	}
@@ -1088,7 +1117,7 @@ void GSDeviceOGL::PSSetShader(GLuint ps)
 	}
 }
 
-void GSDeviceOGL::OMSetFBO(GLuint fbo)
+void GSDeviceOGL::OMSetFBO(GLuint fbo, GLenum buffer)
 {
 	if (m_state.fbo != fbo) {
 		m_state.fbo = fbo;
@@ -1096,6 +1125,12 @@ void GSDeviceOGL::OMSetFBO(GLuint fbo)
 		// FIXME DEBUG
 		//if (fbo) fprintf(stderr, "FB status %x\n", glCheckFramebufferStatus(GL_FRAMEBUFFER));
 	}
+
+	if (m_state.draw != buffer) {
+		m_state.draw = buffer;
+		glDrawBuffer(buffer);
+	}
+
 }
 
 void GSDeviceOGL::OMSetDepthStencilState(GSDepthStencilOGL* dss, uint8 sref)
@@ -1135,20 +1170,19 @@ void GSDeviceOGL::OMSetRenderTargets(GSTexture* rt, GSTexture* ds, const GSVecto
 	m_state.dsv = static_cast<GSTextureOGL*>(ds);
 
 	if (static_cast<GSTextureOGL*>(rt)->IsBackbuffer()) {
+		assert(ds == NULL); // no depth-stencil without FBO
+
 		OMSetFBO(0);
 
-		assert(ds == NULL); // no depth-stencil without FBO
 	} else {
-		OMSetFBO(m_fbo);
-
 		assert(rt != NULL); // a render target must exists
 
 		// FIXME DEBUG special case for GL_R16UI
 		if (rt->GetFormat() == GL_R16UI) {
-			glDrawBuffer(GL_COLOR_ATTACHMENT1);
+			OMSetFBO(m_fbo, GL_COLOR_ATTACHMENT1);
 			static_cast<GSTextureOGL*>(rt)->Attach(GL_COLOR_ATTACHMENT1);
 		} else {
-			glDrawBuffer(GL_COLOR_ATTACHMENT0);
+			OMSetFBO(m_fbo, GL_COLOR_ATTACHMENT0);
 			static_cast<GSTextureOGL*>(rt)->Attach(GL_COLOR_ATTACHMENT0);
 		}
 
diff --git a/plugins/GSdx/GSDeviceOGL.h b/plugins/GSdx/GSDeviceOGL.h
index fc574a5229..0ab52b8853 100644
--- a/plugins/GSdx/GSDeviceOGL.h
+++ b/plugins/GSdx/GSDeviceOGL.h
@@ -805,6 +805,7 @@ class GSDeviceOGL : public GSDevice
 		GSTextureOGL* rtv;
 		GSTextureOGL* dsv;
 		GLuint	   fbo;
++		GLenum	   draw;
 	} m_state;
 
 	bool m_srv_changed;
@@ -840,6 +841,7 @@ class GSDeviceOGL : public GSDevice
 	static void DebugOutputToFile(unsigned int source, unsigned int type, unsigned int id, unsigned int severity, const char* message);
 	void DebugOutput();
 	void DebugInput();
+	void DebugBB();
 
 	bool HasStencil() { return true; }
 	bool HasDepth32() { return true; }
@@ -894,7 +896,7 @@ class GSDeviceOGL : public GSDevice
 	void PSSetSamplerState(GLuint ss0, GLuint ss1, GLuint ss2 = 0);
 	void PSSetShader(GLuint ps);
 
-	void OMSetFBO(GLuint fbo);
+	void OMSetFBO(GLuint fbo, GLenum buffer = GL_COLOR_ATTACHMENT0);
 	void OMSetDepthStencilState(GSDepthStencilOGL* dss, uint8 sref);
 	void OMSetBlendState(GSBlendStateOGL* bs, float bf);
 	void OMSetRenderTargets(GSTexture* rt, GSTexture* ds, const GSVector4i* scissor = NULL);
diff --git a/plugins/GSdx/GSTextureOGL.cpp b/plugins/GSdx/GSTextureOGL.cpp
index 00f4cffd37..73aef4a5d9 100644
--- a/plugins/GSdx/GSTextureOGL.cpp
+++ b/plugins/GSdx/GSTextureOGL.cpp
@@ -120,6 +120,11 @@ GSTextureOGL::GSTextureOGL(int type, int w, int h, bool msaa, int format, GLuint
 			// In worst case the HW renderer seems to use 3 texture unit
 			// For the moment SW renderer only use 1 so don't bother
 			EnableUnit(0);
+			// Did we need to setup a default sampler of the texture now?
+			// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+			// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+			// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+			// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
 			if (m_format == GL_RGBA8)
 				glTexImage2D(m_texture_target, 0, m_format, m_size.x, m_size.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
 			else if (m_format == GL_R16UI)
@@ -144,7 +149,7 @@ GSTextureOGL::~GSTextureOGL()
 void GSTextureOGL::Attach(GLenum attachment)
 {
 	//fprintf(stderr, "format %d,%x\n", m_type, m_format);
-	glFramebufferTexture2D(GL_FRAMEBUFFER, attachment, m_texture_target, m_texture_id, 0);
+	glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, attachment, m_texture_target, m_texture_id, 0);
 	// FIXME DEBUG
 	//fprintf(stderr, "FB status %x\n", glCheckFramebufferStatus(GL_FRAMEBUFFER));
 }
diff --git a/plugins/GSdx/linux_replay.cpp b/plugins/GSdx/linux_replay.cpp
index 0de8a06825..f2d25ab8c9 100644
--- a/plugins/GSdx/linux_replay.cpp
+++ b/plugins/GSdx/linux_replay.cpp
@@ -37,5 +37,5 @@ int main ( int argc, char *argv[] )
   if ( argc != 3 ) help();
 
   GSsetSettingsDir(argv[1]);
-  GSReplay(argv[2], 15);
+  GSReplay(argv[2], 12);
 }