I have win7 and ubuntu 12.04 on dell inspiron 1545 with Dell Wireless 1397 WLAN MiniCard. wireless works fine on windows, but I cannot connect with ubuntu. when I tried connect with a cable - it said the cable was unplugged. when I check wireless networks - it says there are no devices detected.I've tried a few things I found on forums, for example     sudo apt-get install --reinstal bcmwl-kernel-sourceor    sudo apt-get purge bcmwl-kernel-sourcebut it says bcmwl-kernel-source was not found. anyone knows what can I do?Thank you in advance
no internet connection (wireless or wired) on ubuntu 12.04
linux;ubuntu