Well, to help out a neighbor (eh?), see if the following works for you:
Start by opening a Terminal window. First, get everything up-to-date
Code:
sudo apt-get update && sudo apt-get upgrade
Next, downgrade the driver
Code:
sudo apt-get install bcmwl-kernel-source=5.100.82.38+bdcom-0ubuntu6
Then, pin that package so `apt` won't upgrade you back to the (presumably) broken one. Use the command...
Code:
sudo nano /etc/apt/preferences
...and add the following block to that file:
Code:
Package: bcmwl-kernel-source
Pin: version 5.100.82.38*
Pin-priority: 1001
Give that a try and let us know how it went.
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