adaptateur wifi non détecté ubuntu
# Run this and reboot
sudo apt-get install --reinstall bcmwl-kernel-source
Fragile Fox
# Run this and reboot
sudo apt-get install --reinstall bcmwl-kernel-source
#for Ubuntu 20.04
sudo apt install linux-generic-hwe-20.04
SOLUTION
sudo apt-get purge bcmwl-kernel-source
sudo apt-get install broadcom-sta-source broadcom-sta-dkms broadcom-sta-common
reboot
sudo apt install --reinstall bcmwl-kernel-source
sudo apt install linux-generic-hwe-18.04