I have a problem with NetworkManger, or to be specific with the nm-applet. When I choose the WiFi network I want to connect to nothing happens. The terminal window I opened nm-applet shows some warnings and errors, but I don't think that they have something to do with the actual problem:
nm-applet (nm-applet:1442): nm-applet-WARNING **: Error connecting to ModemManager: Error calling StartServiceByName for org.freedesktop.ModemManager1: GDBus.Error:org.freedesktop.systemd1.Load Failed: Unit dbus-org.freedesktop.ModemManager1.service failed to load: No such file or directory. ** Message: Remote error from secret service: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.secrets was not provided by any .service files
I know that one error occurs because I don't have installed the notification tool that is needed for the GNOME notifications.
NetworkManager's service is running. My wifi on-board card is an Intel Pro/Wireless 5100 AGN (it uses the iwlwifi driver). My distribution is Arch Linux and I'm using the awesome WM.