diff --git a/vl.c b/vl.c
index 39833fc..50f133d 100644
--- a/vl.c
+++ b/vl.c
@@ -2996,6 +2996,7 @@
     DisplayState *ds = opaque;
     DisplayChangeListener *dcl = ds->listeners;
 
+    qemu_flush_coalesced_mmio_buffer();
     dpy_refresh(ds);
 
     while (dcl != NULL) {
@@ -3011,6 +3012,7 @@
 {
     uint64_t interval = GUI_REFRESH_INTERVAL;
 
+    qemu_flush_coalesced_mmio_buffer();
     qemu_mod_timer(nographic_timer, interval + qemu_get_clock(rt_clock));
 }