This is my first installation of Ubuntu, but I've been running it live on a DVD and flash drive for months. Today I installed Ubuntu 13.04 onto a 3-year old Lenovo G550 laptop, and it has a proprietary Broadcom wireless driver. When I booted Ubuntu as a live system from the DVD, telling Ubuntu to use the proprietary driver in the settings menu was straightforward, and I was able to connect to my home wifi. However, after installation, I attempted to do the same process, but after I hit "apply changes" after selecting "use broadcom 802.11 Linux STA wireless driver source from bcmwl-kernel-source (propretary)",I was met by a pop-up telling me to authenticate. I entered my password, and hit enter. The window dims, a bar indicates that the change is working, but then it changes again to "do not use driver." For some reason, the driver just won't install. It worked when I was running Ubuntu live, but after installation it won't work. What do I do? My laptop is compromised if I can't use the wireless (because Windows 7 crashed on the computer). Any help would be greatly appreciated.
It seems that there is some problem occurred when you installed Wireless Broadcom 802.11 driver. You can give a try to followings:
I hope any of these steps work for you. Reply if something goes wrong..