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I am brand new to Ubuntu and the forums, and I know very little. So please keep all help simple. I can handle code, but no skipped steps please. Also, if one step needs prior knowledge, I won't know it. I got ubuntu on my Dell Inspiron 3520 model. I have 15.10. My wifi is out, and I don't know why. I have had Vista, Ubunt 14.10, 15.06, and 15.10, and all have thwarted me of wifi by no drivers. In the extra driver section, it says:

Broadcom Corporation: BCM43142 802.11b/g/n (Wireless 1704 802.22n + BT 4.0)
This device is not working.
Using Broadcom 802.11 Linux STA wireless driver source from bcmwl-kernel-source (proprietary)

I have tried to download it here, and failed. I have tried many methods, and none have worked. I tried all marked "Answered". I don't know what else to put in. If you need anything, tell me what. Ethernet works.

Eliah Kagan
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Andrew Steele
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2 Answers2

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To fix this problem, make a dvd with the .iso with the latest version of ubuntu on it. Open the dvd. Click on the following: pool>restricted>b>bcmwl and drop the file on the desktop. Next go to pool>main>d>dkms and drop the file on the desktop. Both files should be .deb Next open the terminal(Control Alt T). Type in the command: cd ~/Desktop
and then: sudo dpkg --configure -a
if there is an error, type the command: lsof /var/lib/dpkg/lock and then: ps cax | grep PID
if it is running then type: kill PID

wait

kill -9 PID type this next: ps cax | grep PID then type: sudo rm /var/lib/dpkg/lock and finally: sudo dpkg --configure -a after typing that repeat: sudo dpkg --configure -a and finally type: sudo modprobe wl this will unlock your wifi. If it is still blocked by hardware switch, then type: sudo rfkill unblock wifi your wifi will be fixed. If not, look elsewhere for answers.

Community
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Andrew Steele
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In my case after upgrading my Ubuntu 15.04 version to 15.10, It didn't recognize my wireless card. What I did was:

1) Run: lspci |grep Wireless (you will get your wireless driver chipset)

2) Download the firmware for my hardware from Intel support site and install it (# sudo cp iwlwifi-7260-15.ucode /lib/firmware/)

3) Download the drivers for my configuration from Broadcom support site, because when running: "sudo modprobe wl" y got the error message: "wl module not found". http://www.broadcom.com/support/?gid=1 (I picked: Linux® STA 64-bit driver --> hybrid-v35_64-nodebug-pcoem-6_30_223_271)

4) # make (to build the wl module) # sudo make install (install)

5) Reboot

Done!. So now I have my WiFi working properly again :)

Additional Steps Because a I have an Intel® Dual Band Wireless-AC 7260, it has some problems when enabling both bluetooth and WiFi, so I also had to do:

6) sudo vi /etc/modprobe.d/blacklist.conf add the line --> blacklist btusb

7) sudo vi /etc/modprobe.d/iwlwifi.conf
comment everything

Zvonko Pino
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