Solved: Getting Wireless Wifi To Work on Peppermint OS

I installed Peppermint 4 OS on a very old Sony Vaio VGN-FS742/W. After updating and confirming that all packages, drivers, and firmware were properly installed, Wifi still would not work.

Type of Wireless Connector: PRO/Wireless 2200BG [Calexico2] Network Connection by Intel Corporation
(IEEE 802.11bg)

Peppermint was apparently “blocking” my card, or something. I finally got Wifi working by editing 1 file.

In terminal:

 sudo gedit /etc/rc.local 

In the rc.local file, add this above the exit 0 line:

rfkill unblock wifi
rfkill unblock all
sudo modprobe -r acer_wmi

Source: Wireless is disabled by hardware switch on Sony Vaio

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