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System: HP ab516TX

sudo lshw -C network

gives

*-network UNCLAIMED     
       description: Network controller
       product: BCM43142 802.11b/g/n
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       version: 01
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress cap_list
       configuration: latency=0
       resources: memory:94100000-94107fff

and lscpi gives

03:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)

I have checked the following topics, they aren't helping:

No WI-FI in Ubuntu 16.04 gnome [duplicate]

How do I install BCM43142 wireless drivers for Dell Vostro 3460/3560?

New : Installing Broadcom Drivers

@Pilot6, Here you go. Yes I did read both of the articles. Also disable secure boot before trying to install the recommended driver.

lspci -knn | grep Net -A2


03:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
    DeviceName: Broadcom BCM43142 802.11 b/g/n 1x1Wi-Fi + BT4.0 M.2 Combo Adapter
    Subsystem: Hewlett-Packard Company BCM43142 802.11b/g/n [103c:804a]
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Kartik Mudgal
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    Possible duplicate of [Installing Broadcom Wireless Drivers](http://askubuntu.com/questions/55868/installing-broadcom-wireless-drivers) – Pilot6 Jun 12 '16 at 10:33
  • Related: http://askubuntu.com/questions/762254/why-do-i-get-required-key-not-available-when-install-dkms-modules-in-ubuntu-16/762255?s=5|0.6999#762255 – Pilot6 Jun 12 '16 at 10:34
  • @Pilot6 I have followed the steps described at Installing Broadcom Wireless Drivers. No dice, the driver is not detected. Any ideas why? – Kartik Mudgal Jun 12 '16 at 11:12
  • Please [edit] your question and add output of `lspci -knn | grep Net -A2` terminal command. Did you read the related link? – Pilot6 Jun 12 '16 at 11:19
  • @Pilot6 Yes, I've read the articles you pointed to. PS: Edited the question to include the details. of {lspci -knn | grep Net -A2}. PS: how do you include formatting in comments? – Kartik Mudgal Jun 12 '16 at 11:31
  • For code formatting in comments, you can use backticks, ie. \`some text \` will result in `some text`. – Jonas Czech Jun 12 '16 at 11:38
  • Did you run `sudo apt-get install bcmwl-kernel-source`? Did you disable SecureBoot if applicable? – Pilot6 Jun 12 '16 at 11:42
  • @Pilot6 Yes, to both. I did however try to install `bcmwl-kernel-source` before I had asked this question, and thus had to `--purge` it first – Kartik Mudgal Jun 12 '16 at 11:45
  • Did it install without errors? – Pilot6 Jun 12 '16 at 11:46
  • derp. I did not check. Sorry for wasting your time, I'll re-install it asap(now) – Kartik Mudgal Jun 12 '16 at 11:49
  • @Pilot6 Ah, I've found out what the problem is: for some reason secure boot is not being disabled even after running `sudo mokutil --disable-validation` ,`mokutil --sb-state` shows `SecureBoot enabled`. Anything I can do to disable it? – Kartik Mudgal Jun 12 '16 at 11:59
  • Please close this question. The error was due to `mokutils` not disabling `SecureBoot`. I had to do it through the setup options at boot [This](http://askubuntu.com/questions/55868/installing-broadcom-wireless-drivers) is a correct solution my problem – Kartik Mudgal Jun 13 '16 at 05:01

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