Comment 34 for bug 1456585

Holy Moly! It gives me real pleasure to realize living in some kind of forbidden world, like outside of North America. Channels 12 and 13 of WIFI 2.4GHz are valid channels for the whole world, perhaps with the exception of North America. There is no need to block these channels!

The problem was that my router was transmitting on channel 13. And both channels 12 and 13 are NOT seen on my DELL, neither on 14.04 nor on Vivid.

As iwlist finds channels 1...13 (in the previous I said 14? Not seen anymore, maybe I had mislooked). This suggests that the clipping of the 2 channels may not be done by the broadcom module, but by something else in the ubuntu configuration.

I have now forced the router to channels 1...11 and wifi works well.