'Launch the xvfb process and wait for it to start the X server
:return: True if the server is started.'

def start_sync(self):

    i = 0
    self.start()
    while (i < 10):
        if (self.xvfb_start_result is None):
            time.sleep(0.2)
            i += 1
        else:
            return self.xvfb_start_result
