Fix connection duping for old libvirt versions

src/virtManager/connection.py

@@ -837,17 +837,22 @@ class vmmConnection(gobject.GObject):
         self.record = []
         self._change_state(self.STATE_DISCONNECTED)
 
-    def open(self):
+    def open(self, sync=False):
         if self.state != self.STATE_DISCONNECTED:
             return
 
+        self.connectError = None
         self._change_state(self.STATE_CONNECTING)
 
-        logging.debug("Scheduling background open thread for " + self.uri)
-        self.connectThread = threading.Thread(target = self._open_thread,
-                                              name = "Connect %s" % self.uri)
-        self.connectThread.setDaemon(True)
-        self.connectThread.start()
+        if sync:
+            logging.debug("Opening connection synchronously: %s" % self.uri)
+            self._open_thread()
+        else:
+            logging.debug("Scheduling background open thread for " + self.uri)
+            self.connectThread = threading.Thread(target = self._open_thread,
+                                                name = "Connect %s" % self.uri)
+            self.connectThread.setDaemon(True)
+            self.connectThread.start()
 
     def _do_creds_polkit(self, action):
         if os.getuid() == 0:

src/virtManager/util.py

@@ -266,8 +266,7 @@ def _dup_all_conn(config, conn, libconn, return_conn_class):
 
     logging.debug("Duplicating connection for async operation.")
     newconn = virtManager.connection.vmmConnection(config, uri, is_readonly)
-    newconn.open()
-    newconn.connectThreadEvent.wait()
+    newconn.open(sync=True)
 
     if return_conn_class:
         return newconn