Wireless Lenovo G550 and Linux Mint

The strange way:
How to fix no Wireless Network Issue in Linux Mint 19.2

sudo lshw -C network
sudo apt remove broadcom-sta-dkms bcmwl-kernel-source

sudo apt install firmware-b43-installer

wget http://cz.archive.ubuntu.com/ubuntu/pool/multiverse/b/b43-fwcutter/firmware-b43-installer_019-4_all.deb

sudo dpkg -R1 |firmware-b43-installer_*




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AN ELEGANT WAY:

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https://www.sysnettechsolutions.com/en/windows/verify-linux-mint-iso-windows-10/