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-rw-r--r--ui/vnc.c4
-rw-r--r--ui/vnc.h1
2 files changed, 4 insertions, 1 deletions
diff --git a/ui/vnc.c b/ui/vnc.c
index 06d6ca009e..f8d9b7db95 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -887,6 +887,7 @@ static int find_and_clear_dirty_height(struct VncState *vs,
 
 static int vnc_update_client(VncState *vs, int has_dirty, bool sync)
 {
+    vs->has_dirty += has_dirty;
     if (vs->need_update && vs->csock != -1) {
         VncDisplay *vd = vs->vd;
         VncJob *job;
@@ -898,7 +899,7 @@ static int vnc_update_client(VncState *vs, int has_dirty, bool sync)
             /* kernel send buffers are full -> drop frames to throttle */
             return 0;
 
-        if (!has_dirty && !vs->audio_cap && !vs->force_update)
+        if (!vs->has_dirty && !vs->audio_cap && !vs->force_update)
             return 0;
 
         /*
@@ -941,6 +942,7 @@ static int vnc_update_client(VncState *vs, int has_dirty, bool sync)
             vnc_jobs_join(vs);
         }
         vs->force_update = 0;
+        vs->has_dirty = 0;
         return n;
     }
 
diff --git a/ui/vnc.h b/ui/vnc.h
index 8f582fdc6c..334de9ddb1 100644
--- a/ui/vnc.h
+++ b/ui/vnc.h
@@ -263,6 +263,7 @@ struct VncState
     VncDisplay *vd;
     int need_update;
     int force_update;
+    int has_dirty;
     uint32_t features;
     int absolute;
     int last_x;