I have a USB dongle for Wifi, a TP-Link one, which is basically a realtek card (I believe). In the beginning it worked, now though Switchboard shows the oxymoron "Cable unplugged" on my wireless connection.
sudo ifconfig wlxe8de27078274 up and it works, but switchboard does not change its state, even after I restart the
network-manager. I can also successfully search for Wifi connections using
sudo iwlist wlxe8de27078274 scan | grep ESSID, of course only after I enable the card using ifconfig. To my surprise though,
nmtui does not show my card.
I believe the problem must be somewhere in the initialization of the card's driver when the system boots.