I just added tasks for the packages mentioned in comment #65. Some things learned today:
- the sub-component of QNetwork that's most likely the cause is called Bearer Management. One of it's classes, QNetworkSession includes a plugin for NetworkManager which creates listeners for new AccessPoint DBus objects. - msyncd ( part of buteo-syncfw ) includes it's own internal NetworkManager class ( dated from 2010 ) which in turn uses QNetworkSession. - unity8 appears to use QNetworkAccessManager, which uses QNetworkSession. - sync-monitor uses QNetworkConfigurationManager, which is also part of Bearer Management, and most likely causes a QNetworkSession to be instantiated. - maliit-framework is the only puzzle, as it doesn't seem to have any network code. It does use QGuiApplication however, which might in turn hook into the network code. - the bulk of the code involved on the Qt side can be found in the qtbase-opensource-base source package. - I'm no expert in QtDBus, but from what I can tell, to listen to a DBus signal ( which causes a match rule to be created ), you need to call connect on an instance of a DBusConnection, similar to what you'd do with a native Qt signal and slot. Conversely, to remove a signal watch, you need to call the disconnect() function. - The connect to for a new new AccessPoint object can be found in src/plugins/bearer/networkmanager/networkmanagerservice.cpp in the funcion QNetworkManagerInterfaceAccessPoint::QNetworkManagerInterfaceAccessPoint(). - I don't see any corresponding cleanup code when an access point is removed ( ie. there's no disconnect() call made to the bus ) That's all I have for now... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1480877 Title: Access points' "PropertiesChanged" dbus signals freeze UI on mobile devices To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1480877/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
