diff --git a/plugins/GSdx/GSDeviceOGL.cpp b/plugins/GSdx/GSDeviceOGL.cpp
index 168699c65b..64197f82ed 100644
--- a/plugins/GSdx/GSDeviceOGL.cpp
+++ b/plugins/GSdx/GSDeviceOGL.cpp
@@ -32,6 +32,10 @@
 static uint32 g_draw_count = 0;
 static uint32 g_frame_count = 1;		
 
+static const uint32 g_merge_cb_index      = 10;
+static const uint32 g_interlace_cb_index  = 11;
+static const uint32 g_shadeboost_cb_index = 12;
+static const uint32 g_fxaa_cb_index       = 13;
 
 GSDeviceOGL::GSDeviceOGL()
 	: m_free_window(false)
@@ -287,7 +291,7 @@ bool GSDeviceOGL::Create(GSWnd* wnd)
 	// ****************************************************************
 	// merge
 	// ****************************************************************
-	m_merge_obj.cb = new GSUniformBufferOGL(1, sizeof(MergeConstantBuffer));
+	m_merge_obj.cb = new GSUniformBufferOGL(g_merge_cb_index, sizeof(MergeConstantBuffer));
 
 	for(uint i = 0; i < countof(m_merge_obj.ps); i++)
 		CompileShaderFromSource("merge.glsl", format("ps_main%d", i), GL_FRAGMENT_SHADER, &m_merge_obj.ps[i]);
@@ -299,14 +303,14 @@ bool GSDeviceOGL::Create(GSWnd* wnd)
 	// ****************************************************************
 	// interlace
 	// ****************************************************************
-	m_interlace.cb = new GSUniformBufferOGL(2, sizeof(InterlaceConstantBuffer));
+	m_interlace.cb = new GSUniformBufferOGL(g_interlace_cb_index, sizeof(InterlaceConstantBuffer));
 
 	for(uint i = 0; i < countof(m_interlace.ps); i++)
 		CompileShaderFromSource("interlace.glsl", format("ps_main%d", i), GL_FRAGMENT_SHADER, &m_interlace.ps[i]);
 	// ****************************************************************
 	// Shade boost
 	// ****************************************************************
-	m_shadeboost.cb = new GSUniformBufferOGL(6, sizeof(ShadeBoostConstantBuffer));
+	m_shadeboost.cb = new GSUniformBufferOGL(g_shadeboost_cb_index, sizeof(ShadeBoostConstantBuffer));
 
 	int ShadeBoost_Contrast = theApp.GetConfig("ShadeBoost_Contrast", 50);
 	int ShadeBoost_Brightness = theApp.GetConfig("ShadeBoost_Brightness", 50);
@@ -347,7 +351,7 @@ bool GSDeviceOGL::Create(GSWnd* wnd)
 	// FIXME need to define FXAA_GLSL_130 for the shader
 	// FIXME need to manually set the index...
 	// FIXME need dofxaa interface too
-	// m_fxaa.cb = new GSUniformBufferOGL(3, sizeof(FXAAConstantBuffer));
+	// m_fxaa.cb = new GSUniformBufferOGL(g_fxaa_cb_index, sizeof(FXAAConstantBuffer));
 	//CompileShaderFromSource("fxaa.fx", format("ps_main", i), GL_FRAGMENT_SHADER, &m_fxaa.ps);
 
 	// ****************************************************************
@@ -597,47 +601,62 @@ void GSDeviceOGL::DebugOutput()
 	//DebugBB();
 }
 
-void GSDeviceOGL::DrawPrimitive()
+#ifdef DISABLE_GL42
+static void set_uniform_buffer_binding(GLuint prog, GLchar* name, GLuint binding) {
+	GLuint index;
+	index = glGetUniformBlockIndex(prog, name);
+	if (index != GL_INVALID_INDEX) {
+		glUniformBlockBinding(prog, index, binding);
+	}
+}
+#endif
+
+void GSDeviceOGL::BeforeDraw()
 {
 #ifdef OGL_DEBUG
 	DebugInput();
 #endif
 
-	m_state.vb->DrawPrimitive();
+#ifdef DISABLE_GL42
+	set_uniform_buffer_binding(m_state.vs, "cb20", 20);
+	set_uniform_buffer_binding(m_state.ps, "cb21", 21);
 
+	set_uniform_buffer_binding(m_state.ps, "cb10", 10);
+	set_uniform_buffer_binding(m_state.ps, "cb11", 11);
+	set_uniform_buffer_binding(m_state.ps, "cb12", 12);
+	set_uniform_buffer_binding(m_state.ps, "cb13", 13);
+#endif
+}
+
+void GSDeviceOGL::AfterDraw()
+{
 #ifdef OGL_DEBUG
 	DebugOutput();
 	g_draw_count++;
 #endif
 }
 
+void GSDeviceOGL::DrawPrimitive()
+{
+	BeforeDraw();
+	m_state.vb->DrawPrimitive();
+	AfterDraw();
+}
+
 void GSDeviceOGL::DrawIndexedPrimitive()
 {
-#ifdef OGL_DEBUG
-	DebugInput();
-#endif
-
+	BeforeDraw();
 	m_state.vb->DrawIndexedPrimitive();
-
-#ifdef OGL_DEBUG
-	DebugOutput();
-	g_draw_count++;
-#endif
+	AfterDraw();
 }
 
 void GSDeviceOGL::DrawIndexedPrimitive(int offset, int count)
 {
 	ASSERT(offset + count <= m_index.count);
-#ifdef OGL_DEBUG
-	DebugInput();
-#endif
 
+	BeforeDraw();
 	m_state.vb->DrawIndexedPrimitive(offset, count);
-
-#ifdef OGL_DEBUG
-	DebugOutput();
-	g_draw_count++;
-#endif
+	AfterDraw();
 }
 
 void GSDeviceOGL::ClearRenderTarget(GSTexture* t, const GSVector4& c)
@@ -733,7 +752,7 @@ GSTexture* GSDeviceOGL::CopyOffscreen(GSTexture* src, const GSVector4& sr, int w
 	{
 		ASSERT(0);
 
-		return false;
+		return NULL;
 	}
 
 	// FIXME: It is possible to bypass completely offscreen-buffer on opengl but it needs some re-thinking of the code.
@@ -1283,7 +1302,11 @@ void GSDeviceOGL::CompileShaderFromSource(const std::string& glsl_file, const st
 	// Build a header string
 	// *****************************************************
 	// First select the version (must be the first line so we need to generate it
+#ifdef DISABLE_GL42
+	std::string version = "#version 330\n#extension GL_ARB_separate_shader_objects : require\n#define DISABLE_GL42\n";
+#else
 	std::string version = "#version 330\n#extension GL_ARB_shading_language_420pack: require\n#extension GL_ARB_separate_shader_objects : require\n";
+#endif
 	//std::string version = "#version 420\n";
 
 	// Allow to puts several shader in 1 files
diff --git a/plugins/GSdx/GSDeviceOGL.h b/plugins/GSdx/GSDeviceOGL.h
index 195e6697f2..697c9e6da0 100644
--- a/plugins/GSdx/GSDeviceOGL.h
+++ b/plugins/GSdx/GSDeviceOGL.h
@@ -599,6 +599,8 @@ class GSDeviceOGL : public GSDevice
 	void DrawPrimitive();
 	void DrawIndexedPrimitive();
 	void DrawIndexedPrimitive(int offset, int count);
+	void BeforeDraw();
+	void AfterDraw();
 
 	void ClearRenderTarget(GSTexture* t, const GSVector4& c);
 	void ClearRenderTarget(GSTexture* t, uint32 c);
diff --git a/plugins/GSdx/GSTextureFXOGL.cpp b/plugins/GSdx/GSTextureFXOGL.cpp
index ab062688bd..80d4e4699c 100644
--- a/plugins/GSdx/GSTextureFXOGL.cpp
+++ b/plugins/GSdx/GSTextureFXOGL.cpp
@@ -23,10 +23,13 @@
 #include "GSDeviceOGL.h"
 #include "GSTables.h"
 
+static const uint32 g_vs_cb_index = 20;
+static const uint32 g_ps_cb_index = 21;
+
 void GSDeviceOGL::CreateTextureFX()
 {
-	m_vs_cb = new GSUniformBufferOGL(4, sizeof(VSConstantBuffer));
-	m_ps_cb = new GSUniformBufferOGL(5, sizeof(PSConstantBuffer));
+	m_vs_cb = new GSUniformBufferOGL(g_vs_cb_index, sizeof(VSConstantBuffer));
+	m_ps_cb = new GSUniformBufferOGL(g_ps_cb_index, sizeof(PSConstantBuffer));
 
 	glGenSamplers(1, &m_rt_ss);
 	// FIXME, seem to have no difference between sampler !!!
diff --git a/plugins/GSdx/config.h b/plugins/GSdx/config.h
index a11724fcb7..80c47392b9 100644
--- a/plugins/GSdx/config.h
+++ b/plugins/GSdx/config.h
@@ -35,3 +35,5 @@
 //#define DISABLE_COLCLAMP
 
 //#define DISABLE_DATE
+
+//#define DISABLE_GL42
diff --git a/plugins/GSdx/res/interlace.glsl b/plugins/GSdx/res/interlace.glsl
index 97e567fa1b..21b81af113 100644
--- a/plugins/GSdx/res/interlace.glsl
+++ b/plugins/GSdx/res/interlace.glsl
@@ -11,7 +11,11 @@ layout(location = 0) in vertex_basic PSin;
 
 layout(location = 0) out vec4 SV_Target0;
 
-layout(std140, binding = 2) uniform cb0
+#ifdef DISABLE_GL42
+layout(std140) uniform cb11
+#else
+layout(std140, binding = 11) uniform cb11
+#endif
 {
     vec2 ZrH;
     float hH;
diff --git a/plugins/GSdx/res/merge.glsl b/plugins/GSdx/res/merge.glsl
index e9a93bdc88..ed3ca36062 100644
--- a/plugins/GSdx/res/merge.glsl
+++ b/plugins/GSdx/res/merge.glsl
@@ -11,7 +11,11 @@ layout(location = 0) in vertex_basic PSin;
 
 layout(location = 0) out vec4 SV_Target0;
 
-layout(std140, binding = 1) uniform cb0
+#ifdef DISABLE_GL42
+layout(std140) uniform cb10
+#else
+layout(std140, binding = 10) uniform cb10
+#endif
 {
     vec4 BGColor;
 };
diff --git a/plugins/GSdx/res/shadeboost.glsl b/plugins/GSdx/res/shadeboost.glsl
index c98222d80a..006329ae80 100644
--- a/plugins/GSdx/res/shadeboost.glsl
+++ b/plugins/GSdx/res/shadeboost.glsl
@@ -18,7 +18,11 @@ layout(location = 0) in vertex_basic PSin;
 
 layout(location = 0) out vec4 SV_Target0;
 
-layout(std140, binding = 6) uniform cb0
+#ifdef DISABLE_GL42
+layout(std140) uniform cb12
+#else
+layout(std140, binding = 12) uniform cb12
+#endif
 {
     vec4 BGColor;
 };
diff --git a/plugins/GSdx/res/tfx.glsl b/plugins/GSdx/res/tfx.glsl
index 85c1cb732c..f25ba617a2 100644
--- a/plugins/GSdx/res/tfx.glsl
+++ b/plugins/GSdx/res/tfx.glsl
@@ -69,7 +69,11 @@ out gl_PerVertex {
     float gl_ClipDistance[];
 };
 
-layout(std140, binding = 4) uniform cb0
+#ifdef DISABLE_GL42
+layout(std140) uniform cb20
+#else
+layout(std140, binding = 20) uniform cb20
+#endif
 {
     vec4 VertexScale;
     vec4 VertexOffset;
@@ -278,7 +282,11 @@ layout(binding = 0) uniform sampler2D TextureSampler;
 layout(binding = 1) uniform sampler2D PaletteSampler;
 layout(binding = 2) uniform sampler2D RTCopySampler;
 
-layout(std140, binding = 5) uniform cb1
+#ifdef DISABLE_GL42
+layout(std140) uniform cb21
+#else
+layout(std140, binding = 21) uniform cb21
+#endif
 {
     vec3 FogColor;
     float AREF;