Great question — answering as the UphillTech team:
Try looking if you have a correct driver for your wifi device, in the terminal you should type: sudo lshw | more or in Gnome Graphical Desktop, run the "Additional Drivers" application. Best Regards
Full answer by Daniel Espinosa: https://askubuntu.stackexchange.com/a/1569398 (CC BY-SA 4.0).
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