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I have installed Ubuntu 16.04 LTS on my HP laptop along with Windows 10. I use wi-fi router daily with windows to connect to internet. But when I am switching to UBUNTU, my laptop is not connecting to my router. If I use a LAN wire, it works fine. I tried many solutions as said on ubuntu forums, such as:

  • In Settings->Software and Updates, I searched for drivers and clicked to use Broadcom 802.11 driver and restarted. Not worked.

  • I restarted NetworkManager service, still did not work.

And in Menu bar, network manager is also not visible.

I searched through other solutions on askubuntu.com also, but nothing worked for me.

Please help me on this.

prateek goyal
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  • mention your laptop model and wifi chip details. that is too little info to help you. – Surya Teja Karra May 01 '16 at 08:35
  • My laptop model : HP 15-af114AU Notebook
    Model #: P3C92PA
    _italic_ Network Card(s): 2 NIC(s) Installed. [01]: Broadcom BCM43142 802.11 bgn Wi-Fi M.2 Adapter Connection Name: Wi-Fi DHCP Enabled: Yes DHCP Server: 192.168.1.1 IP address(es) _italic_     – prateek goyal May 01 '16 at 10:28
  • Is secure boot enabled? – Jeremy31 May 01 '16 at 12:24
  • @Jeremy Yes secure boot is enabled. – prateek goyal May 01 '16 at 12:46
  • It may be time for a bug report as the bcmwl-kernel-source module doesn't seem to be able to be used with secure boot enabled. Try `sudo modprobe -v wl` and see if it returns errors `Required key not available` and `Operation not permitted` – Jeremy31 May 01 '16 at 13:08
  • @Jeremy31 I ran the command `sudo modprobe -v wl` and got the following input modprobe: FATAL: Module wl not found in directory /lib/modules/4.4.0-21-generic. and if it is a bug, where should I report it? – prateek goyal May 01 '16 at 16:10
  • Try `sudo apt-get install bcmwl-kernel-source` reboot and see if wifi works or the results from `sudo modprobe -v wl` are different. [Pilot6's answer](http://askubuntu.com/a/762255/300665) may help as there is a chance he is correct about the issue – Jeremy31 May 01 '16 at 16:25
  • @Jeremy31 I tried to install bcmwl-kernel-source, but it was already installed, however after tring @Pilot6 answer, the error message of `sudo modprobe -v wl` changed and it showed **Required key not available**. But it did not solve problem and finally I disabled secure boot. Is it safe to disable secure boot? – prateek goyal May 02 '16 at 06:39
  • I don't use it on the one laptop I own that has the option – Jeremy31 May 02 '16 at 10:09

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