diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index baf8210..c495f29 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -1017,6 +1017,13 @@ static void intel_i830_chipset_flush(struct agp_bridge_data *bridge)
 		"i8xx chipset flush failed, expected: %u, gtt_read: %u\n",
 		intel_private.i8xx_cache_flush_num, gtt_read);
 
+	if (cpu_read != intel_private.i8xx_cache_flush_num ||
+		gtt_read != intel_private.i8xx_cache_flush_num) {
+		printk("gtt readback: %u, cpu reaback: %u\n",
+			readl(intel_private.i8xx_gtt_cc_pages + offset1),
+			*p_cpu_write);
+		}
+
 	intel_private.i8xx_cache_flush_num++;
 }