问题
QNetworkConfigurationManager::configurationChanged() signal is not getting called by the system when I am inserting a LAN cable with a valid IP(Ethernet interface).
It is getting called for WLAN and USB interface but not for ETHERNET config changes
Hope to get some pointers on this.
来源：https://stackoverflow.com/questions/14359657/qnetworkconfigurationmanagerconfigurationchanged-signal-not-getting-called-for