hp pavilion g6 1250 with a BCM 4313 doesn't see any wireless networks
Solution 1:
Finally i was able to fix the problem using this link
http://tuxcanfly.appspot.com/2011/10/Ubuntu-11-10-Broadcom-Wifi-driver-43xx
the brcmsmac driver (inspire that every one recommends it for bcm4313) had problems with ubuntu 11.10 , the solution was just to blacklist it and install bcmwl-kernel-source
the instructions on the link are easy to follow