Comment 10 for bug 1107109

I am seeing this issue too, on two different laptops. One is a HP-Mini-210-1100, the other a old black MacBook. On both, everything is fine if I downgrade to 5.100.82.38 using
   sudo apt-get install bcmwl-kernel-source=5.100.82.38+bdcom-0ubuntu6

With bcmwl-kernel-source=6.20.155.1+bdcom-0ubuntu0.0.1 installed, the wireless works as far as seeing the available networks, but when I try to connect, the status in the top menu bar repeatedly loops through showing the "radiating waves icon" typical of when connecting to a network, and then switches to the circular "updating" icon usually seen when first turning on wireless, and then back again to the "waves", repeating that several times before eventually announcing "network disconnected". Looking at the log messages using
   sudo tail -f /var/log/kern.log
while this is happening, I see lots of messages from cfg80211 about disabling frequencies, updating information, disabling frequencies, over and over again.

I'll just downgrade until this is fixed, since that works for me, but I hope it gets fixed. (I prefer not to fuss with update-notifier update-manager's default settings if I can help it, but that means it will keep offering this update to me.)