Index: /trunk/src/VBox/Main/ConsoleImplTeleporter.cpp
===================================================================
--- /trunk/src/VBox/Main/ConsoleImplTeleporter.cpp	(revision 31255)
+++ /trunk/src/VBox/Main/ConsoleImplTeleporter.cpp	(revision 31256)
@@ -1237,7 +1237,9 @@
 
     /*
-     * Say hello.
-     */
-    int vrc = RTTcpWrite(Sock, g_szWelcome, sizeof(g_szWelcome) - 1);
+     * Disable Nagle and say hello.
+     */
+    int vrc = RTTcpSetSendCoalescing(pState->mhSocket, false /*fEnable*/);
+    AssertRC(vrc);
+    vrc = RTTcpWrite(Sock, g_szWelcome, sizeof(g_szWelcome) - 1);
     if (RT_FAILURE(vrc))
     {