Index: sdl/sdl_glimp.c
===================================================================
--- sdl/sdl_glimp.c	(revision 2096)
+++ sdl/sdl_glimp.c	(working copy)
@@ -748,6 +750,17 @@
 
 	// This depends on SDL_INIT_VIDEO, hence having it here
 	IN_Init( );
+
+        qglColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+        qglClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+        qglClearDepth(1.0);
+
+        qglDrawBuffer(GL_FRONT);
+        qglClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_ACCUM_BUFFER_BIT|GL_STENCIL_BUFFER_BIT);
+
+        qglDrawBuffer(GL_BACK);
+        qglClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_ACCUM_BUFFER_BIT|GL_STENCIL_BUFFER_BIT);
+
 }