diff -udp Mesa-7.11.2/src/mesa/drivers/osmesa/osmesa.c.orig Mesa-7.11.2/src/mesa/drivers/osmesa/osmesa.c
--- Mesa-7.11.2/src/mesa/drivers/osmesa/osmesa.c.orig	2011-12-18 15:38:08.000000000 +0600
+++ Mesa-7.11.2/src/mesa/drivers/osmesa/osmesa.c	2011-12-18 17:22:23.000000000 +0600
@@ -996,6 +996,10 @@ new_osmesa_renderbuffer(struct gl_contex
       case GL_UNSIGNED_SHORT:
          rb->Format = MESA_FORMAT_RGBA_16;
          break;
+      case GL_UNSIGNED_SHORT_5_6_5:
+         rb->Format = MESA_FORMAT_RGB565;
+         type = GL_UNSIGNED_BYTE;
+         break;
       case GL_FLOAT:
          rb->Format = MESA_FORMAT_RGBA_FLOAT32;
          break;