2 files changed, 3 insertions, 5 deletions
diff --git a/src/mesa/drivers/dri/sis/sis_context.c b/src/mesa/drivers/dri/sis/sis_context.c
index 0d15bfa5e90..3b23b7df4e5 100644
--- a/src/mesa/drivers/dri/sis/sis_context.c
+++ b/src/mesa/drivers/dri/sis/sis_context.c
@@ -312,11 +312,6 @@ sisMakeCurrent( __DRIcontextPrivate *driContextPriv,
 
       sisUpdateBufferSize( newSisCtx );
       sisUpdateClipping( newSisCtx->glCtx );
-
-      if ( newSisCtx->glCtx->Viewport.Width == 0 ) {
-         _mesa_set_viewport(newSisCtx->glCtx, 0, 0,
-                            driDrawPriv->w, driDrawPriv->h);
-      }
    } else {
       _mesa_make_current( 0, 0 );
    }
diff --git a/src/mesa/drivers/dri/sis/sis_state.c b/src/mesa/drivers/dri/sis/sis_state.c
index 2cca1611df7..b269d694b0f 100644
--- a/src/mesa/drivers/dri/sis/sis_state.c
+++ b/src/mesa/drivers/dri/sis/sis_state.c
@@ -39,6 +39,7 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include "sis_tex.h"
 
 #include "context.h"
+#include "buffers.h"
 #include "enums.h"
 #include "colormac.h"
 #include "swrast/swrast.h"
@@ -436,6 +437,8 @@ static void sisDDViewport( GLcontext *ctx,
 			   GLint x, GLint y,
 			   GLsizei width, GLsizei height )
 {
+   /* update size of Mesa/software ancillary buffers */
+   _mesa_ResizeBuffersMESA();
    sisCalcViewport( ctx );
 }