I have a Dell Inspiron 15R that came preinstalled with Windows 8.1 I just installed Ubuntu 12.04 in dual boot and got it working. Now i cannot connect to wifi. I tried How do I install BCM43142 wireless drivers for Dell Vostro 3460/3560? and also other methods involving installing firmware-b43-installer and b43-fwcutter. Nothing works. rfkill list all only shows Bluetooth:

rfkill list all

0: hci0: Bluetooth

Soft blocked: no
Hard blocked: no


My wireless hardware isn't detected at all! What do i do?


output for lspci -nnk | grep -iA2 net:

    01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 07)
        Subsystem: Dell Device [1028:05e9]
        Kernel driver in use: r8169

02:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
    Subsystem: Dell Wireless 1704 802.11n + BT 4.0 [1028:0016]
    Kernel driver in use: bcma-pci-bridge

and for iwconfig:

eth0      no wireless extensions.

lo        no wireless extensions.

Step one: Connect your system to the network temporarily using an Ethernet cable.

Step two: Open a terminal and issue the commands: sudo apt-get update and then after that completes, sudo apt-get upgrade

Step three:

Open Additional Drivers and install what is recommended. If there aren't any needed or recommended you'll see this:


If your wireless hardware isn't detected at all, consider trying a USB wifi adapter as the integrated one may be damaged somehow.

  • I installed the drivers... Now it says 'Activated but not in use' and still refuses to detect the wifi. Any tips? – user306084 Jul 29 '14 at 13:05
  • Insure wireless networking is activated and the indicator led for your wireless is on. – Elder Geek Jul 30 '14 at 16:05
  • I had done that back then, as well! :-/ I tried a hundred different things after that, then gave up. My ubuntu still doesn't detect wireless. It's been a while, i know, but could you still help? – user306084 Jan 20 '15 at 11:37
  • Expanded answer - without knowing the "hundred things" you've tried it's hard to say which helped and which made things worse.... – Elder Geek Jan 20 '15 at 14:10

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.