So I am using an Alfa AWUS036H usb wifi adapter on Ubuntu capable of monitor mode and injection, and up until recently it was working fine with Wireshark and Airodump. I was fooling around with Ettercap and Dsniff and since doing that Wireshark is not listing anything under capture devices. When I try to run Airodump after putting my card in monitor mode, I receive an error saying ethernet was expected and my card is incapable of injection (which is false because ive used it to inject on many occasions).

The only major things I changed that I can think of before it stopped working were that I enabled IP forwarding and enabled DCHP. Anyone have any ideas?