diff --git a/src/gallium/drivers/r300/r300_blit.c b/src/gallium/drivers/r300/r300_blit.c
index 4ac2589a9a7..ff5ad12a988 100644
--- a/src/gallium/drivers/r300/r300_blit.c
+++ b/src/gallium/drivers/r300/r300_blit.c
@@ -272,6 +272,11 @@ static void r300_clear(struct pipe_context* pipe,
         } else {
             zmask_clear = r300_fast_zclear_allowed(r300, buffers);
             hiz_clear = r300_hiz_clear_allowed(r300);
+	    /* FIXME: only for testing! */
+            /*zmask_clear = FALSE;*/
+            /*zmask_clear = TRUE; // - this alone looks bad, bothfalse look good, zmaks_clear only false hiz_clear untouched is good */
+            /*hiz_clear = FALSE;*/
+            /*hiz_clear = TRUE; // enabling this and falsing zmask_clear shows picture but FPS is lower in glxgears...*/
         }
 
         /* If we need Hyper-Z. */
@@ -292,12 +297,14 @@ static void r300_clear(struct pipe_context* pipe,
             /* Setup Hyper-Z clears. */
             if (r300->hyperz_enabled) {
                 if (zmask_clear) {
+/*
                     hyperz_dcv = hyperz->zb_depthclearvalue =
                         r300_depth_clear_value(fb->zsbuf->format, depth, stencil);
 
                     r300_mark_atom_dirty(r300, &r300->zmask_clear);
                     r300_mark_atom_dirty(r300, &r300->gpu_flush);
                     buffers &= ~PIPE_CLEAR_DEPTHSTENCIL;
+*/
                 }
 
                 if (hiz_clear) {