Comment 15 for bug 931168

Here are the results of my tests for your proposed workarounds.
Unfortunately, none of them worked for me.

Broadcom STA wireless :
I did not manage to make it work with your link https://help.ubuntu.com/community/BroadcomSTA%28Wireless%29. But I managed to install it with https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx#STA_-_Internet_access :
- sudo apt-get install bcmwl-kernel-source
- activate driver in the additional drivers GUI

I checked that driver "wl" was used after connecting to another wifi network
I have a slightly different behavior : the wifi network on channel 13 is not detected at all.
iw reg get or iw reg set commands fail with a "nl80211 not found'

Ndiswrapper :
I managed to install it following https://help.ubuntu.com/community/WifiDocs/Driver/Ndiswrapper (I had to compile ndiswrapper 1.57 from source). I used the windows driver from http://www.mediafire.com/file/3po0b925r0n1yyl/

I checked that driver "ndiswrapper" was used after connecting to another wifi network
I can see my channel 13 wifi network, but cannot connect to it (asking password again and again)
iw reg get or iw reg set commands also fail with a "nl80211 not found'
I also tried to change the windows .ini, to put FR as the default country, but it did not seem to change anything

I checked again with another laptop that my wifi on channel 13 was working correctly. It does work with a iwl3945 driver