# Ubuntu – Cannot use wifi broadcom 802.11 alternative driver in ubuntu 15.04

I have a dell Inspiron 11 with the Broadcom 802.11 driver.

Playing with Ubuntu 15.04 live cd it works ok. I have to select additional drivers, check on "Using Broadcom 802.11 Linux STA wireless driver source from bcmwl-kernel-source (proprietary)" and everything works ok.

But after installing Ubuntu to my hard drive I can no longer use it. I check the driver, but after a few seconds the window shows up as if it woudln't have been selected. I guess that if must raise some kind of error that just get lost.

Anybody knows how to solve it, or at least how to do it manually so that I can see what is the error?

More over, where should I report this bug so that it can be corrected on future versions? I'm sure it must be pretty easy to fix because on the livecd it works fine.

BTW, every distro based con 15.04 has the same problem. Right now I'm using Elementary Freya, which is based on Ubuntu 14.04 LTS, and everything works fine.

$lspci | grep Network 01:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)$ uname -a
Linux freya 3.16.0-38-generic #52~14.04.1-Ubuntu SMP Fri May 8 09:43:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux


• If you still have the install DVD or USB, then you can find the correct driver and its prerequisite there. Navigate to pool > restricted > b > bcmwl and drag and drop the deb file to your desktop. Now navigate to pool > main > d > dkms and drag and drop dkms to your desktop. Now install both with:

cd ~/Desktop
sudo dpkg -i *.deb


sudo modprobe wl