Hi,
Yesterday I ran into a "no traffic" situation, which was not resolveable by 
unloading the wl module:

tcpdump on the wlan0 interface showed me only:

00:21:21.575404 EAPOL key (3) v2, len 117
00:21:21.865239 EAPOL key (3) v2, len 117
00:21:22.385278 EAPOL key (3) v2, len 11
...


At the same I was able to use the same (hotel) accesspoint with my android 
phone without trouble. After a reboot (and a update to 4.1.4), the Wifi worked.

One observation: I remember the kde network manager thing telling me the
Wifi was "WPA" while it was not able to connect. After the reboot the
working variant is  WPA2-PSK. Maybe the wpa-supplicant got wrong info
from the driver (via cfg802 ????)

rgds,
j

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https://bugs.launchpad.net/bugs/1478592

Title:
  bcmwl-kernel-source fixes [Patch]

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