I've installed F14 on a new Acer Aspire 5742G Notebook with a Thompson Speedtouch 536 DSL modem connected via USB and found I could not connect to my ISP.
Using the 'Edit Connections' option by a right click on the network icon, I deleted all connections.
With 'Enable Networking' and 'Enable Notifications' options checked, I have gone back to 'Edit Connections' and added a DSL connection which includes a user name and password for the ISP. The result was no connection to the ISP and no connection indicated by the network icon. I deleted the DSL connection and added a 'Wired Connection'. This resulted in an indication by the networking icon that a connection was established. Still no connection to the ISP. I subsequently tried all combinations and permutations of connections and presented options without the ability to connect to my ISP.
I have only one internet connection available (via the DSL modem) which I have been using for months with a desktop running F12. In order to read web based help info and guides etc. I have simply plugged the USB cable into the desk top as needed and that has worked fine. The notebook was shutdown and rebooted after a hot unplug event. The desktop was not.
I've run nmcli, ifconfig and a couple of other tools but that has not helped me.
Anyone got any suggestions?