when trying to connect to a *new* network using plasma-nm, plasmashell crashes with the following message. /usr/bin/plasmashell: symbol lookup error: /usr/lib/x86_64-linux-gnu/libplasmanm_editor.so: undefined symbol: _ZNK14NetworkManager18ConnectionSettings19autoconnectPriorityEv gdb plasmashell bt just sais no stack. I don't know why System (Ubuntu 15.10 beta) related https://bugzilla.opensuse.org/show_bug.cgi?id=933977 Reproducible: Always
You would need to ask your distro packagers to rebuild either networkmanager-qt or plasma-nm against current NetworkManager version.
I have the same problem in Kubuntu 15.10 upgraded from Kubuntu 15.04. I still use kernel 3.19 because the video card behavior with kernel 4.X is not good. When I try to add a new connection: > kde5-nm-connection-editor Invalid service name "/org/kde/kde5-nm-connection-editor" using: "/org/kde/kde5nmconnectioneditor" plasma-nm: Item "Nexxt_520B58" : active connection state changed to 2 networkmanager-qt: void NetworkManager::NetworkManagerPrivate::propertiesChanged(const QVariantMap&) Unhandled property "Devices" networkmanager-qt: void NetworkManager::NetworkManagerPrivate::propertiesChanged(const QVariantMap&) Unhandled property "PrimaryConnectionType" plasma-nm: NetworkManager state changed to 7 kde5-nm-connection-editor: symbol lookup error: /usr/lib/x86_64-linux-gnu/libplasmanm_editor.so: undefined symbol: _ZNK14NetworkManager18ConnectionSettings19autoconnectPriorityEv I have to reinstall the OS?