Wifi Problem with dual booting Ubuntu 14.04 and Windows 8.1

Question

So I've installed both Windows 8.1 and Ubuntu (dual-booting), and the for the most part, I have followed instructions. However, right now I can't figure out why my wifi on my Ubuntu does not work. When I click on the Network icon, the "Enable Wifi" does not even appear.

My machine is the Lenovo Flex 2, 15 inch.

$ lspci -knn | grep Net -A2 && rfkill list

02:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n[14e4:4365] (rev 01)
        Subsystem: Lenovo Device [17aa:0621]
        Kernel driver in use: bcma-pci-bridge
0: ideapad_wlan: Wireless LAN
        Soft blocked: no
        Hard blocked: no
1: ideapad_bluetooth: Bluetooth
        Soft blocked: no
        Hard blocked: no

Please [edit] your question and add output of `lspci -knn | grep Net -A2 && rfkill list` terminal command. — Pilot6, Jun 18 '15 at 09:48
possible duplicate of [Installing Broadcom Wireless Drivers](http://askubuntu.com/questions/55868/installing-broadcom-wireless-drivers) — Fabby, Jun 21 '15 at 07:53

score 0 · Accepted Answer · edited Apr 13 '17 at 12:25

0

sudo apt-get install bcmwl-kernel-source

will fix it.

Offline Guide.

edited Apr 13 '17 at 12:25

Community

1

answered Jun 19 '15 at 08:12

Pilot6

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I tried that, but then it asks me to insert the disc labeled 'Ubuntu 14.04.2 LTS _Trusty Tahr_ - Release amd64 (20150218.1)' – Edasaur Jun 20 '15 at 01:14
As soon as I mount the iso file, the file unmounts and it prompts me again for the iso file.... – Edasaur Jun 20 '15 at 01:19
@Pilot6: look at duplicate... **;-)** – Fabby Jun 21 '15 at 07:53
@Edasaur Do you have a wired internet connection? If not use offline guide. – Pilot6 Jun 21 '15 at 07:56
@Fabby Duplicate is very good but too complex. – Pilot6 Jun 21 '15 at 07:58
Duplicate is very good *and thorough* thus not very easy... **;-)** – Fabby Jun 21 '15 at 08:02
@Pilot6, it worked! Thank you so much! Out of curiosity, how do you guys know so much about debugging ubuntu problems? – Edasaur Jun 21 '15 at 09:46
@Edasaur Just read http://askubuntu.com/questions/55868/installing-broadcom-wireless-drivers, and you will know as much as we do )) – Pilot6 Jun 21 '15 at 09:51

Wifi Problem with dual booting Ubuntu 14.04 and Windows 8.1

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