How to Fix ‘No WiFi Adapter’ Issue in Ubuntu 20.04

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In case you are using a (now) outdated version of Ubuntu and run into some weird WiFi issue.
Published

January 10, 2021

If Ubuntu 20.04 greets you with a “no WiFi adapter” error after running updates, this fixed it for me:

  1. Connect the laptop to the internet (ethernet, phone tethering, etc.).
  2. Run the following two commands in the terminal (Ctrl + T):
sudo apt-get purge bcmwl-kernel-source
sudo apt-get install broadcom-sta-source broadcom-sta-dkms broadcom-sta-common

Reboot and everything should be running smoothly again.

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