Comment 2 for bug 121819

First install the last version of ndiswrapper, from here http://ndiswrapper.sourceforge.net/
follow this requirements:
http://ndiswrapper.sourceforge.net/joomla/index.php?/component/option,com_openwiki/Itemid,33/id,installation/

ndiswrapper -l
net5211 : driver installed
        device (168C:001C) present (alternate driver: ath_pci)

Try to remove the module ath_pci to let ndiswrapper to use the wifi.
      "sudo rmmod ath_pci" or "sudo modprobe -r ath_pci"

also try put that module in the blacklist of modprobe to avoid his loading on the startup:

           sudo nano /etc/modprobe.d/blacklist-common

Insert this line:
         blacklist ath_pci

Then restart.
When u will boot again. Try to remove the old ndiswrapper driver:
        #ndiswrapper -r net5211
and load again:
        #ndiswrapper -i net5211.inf
 then install to modprobe
        #ndiswrapper -m

Then you should be able to see from ifconfig the new lan named wlan0

Tell me the results.