File x11vnc-thread-auth.diff of Package x11vnc

diff --git a/src/screen.c b/src/screen.c
index 21e2eed..d5d42e4 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -4363,6 +4363,37 @@ if (0 && dt > 0.0) fprintf(stderr, "dt: %.5f %.4f\n", dt, dnowx());
 	return msec;
 }
 
+/*
+ * Terrible hack for the multithreaded x11vnc ...
+ * But we get the client confused if we start sending stuff in our
+ * main loop prior to it being initialized properly. So wait.
+ * It's polling :-(
+ */
+static void _mt_wait_for_client() {
+	time_t start = time(0);
+	while (!client_count) {
+		if (first_conn_timeout && time(0) - start > first_conn_timeout)
+			return;
+		usleep(100*1000);
+	}
+	while (1) {
+		rfbClientIteratorPtr iter;
+		rfbClientPtr cl;
+		iter = rfbGetClientIterator(screen);
+		while( (cl = rfbClientIteratorNext(iter)) ) {
+			//ClientData *cd = (ClientData *) cl->clientData;
+			if (cl->state == RFB_NORMAL) {
+				rfbReleaseClientIterator(iter);
+				return;
+			}
+		}
+		rfbReleaseClientIterator(iter);
+		if (first_conn_timeout && time(0) - start > first_conn_timeout)
+			return;
+		usleep(100*1000);
+	}
+}
+
 /*
  * main x11vnc loop: polls, checks for events, iterate libvncserver, etc.
  */
@@ -4374,6 +4405,7 @@ void watch_loop(void) {
 	if (use_threads && !started_rfbRunEventLoop) {
 		started_rfbRunEventLoop = 1;
 		rfbRunEventLoop(screen, -1, TRUE);
+        _mt_wait_for_client();
 	}
 
 	while (1) {