I reinstallled my Ubuntu just now and i typed to CMD rfkill list but it showed this:

0: ideapad_wlan: Wireless LAN
        Soft blocked: no
        Hard blocked: no

And after lspci-knn | grep Net -A2 it showed this:

01:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
    Subsystem: Lenovo Device [17aa:0611]
    Kernel driver in use: bcma-pci-bridge

So what i am supposed to do if my wifi doesnt work (my pc cant find any) and i dont have connection to internet only on my mobil phone.

  • Please edit your question and add output of lspci -knn | grep Net -A2 terminal command. – Pilot6 Oct 11 '15 at 9:52
  • 2
    Possible duplicate of Installing Broadcom Wireless Drivers – Pilot6 Oct 11 '15 at 10:05
  • If you can't connect to internet, then refer to askubuntu.com/questions/626642/… – Pilot6 Oct 11 '15 at 10:06
  • IDK what to do with this: sudo dpkg -i *.deb ... this sign * means that there i must type full name of that file what i want to install? Becouse i did it and i got error – user3396072 Oct 11 '15 at 10:22
  • Just run this command as it is. it will be substituted itself. Or type in the file name, if you have other deb files there. – Pilot6 Oct 11 '15 at 10:23

Install the proprietary BROADCOM Linux drivers.

Open a terminal and execute:

sudo apt-get update  
sudo apt-get install dkms
sudo apt-get install bcmwl-kernel-source  
sudo reboot  

When you don't have Internet access or cannot connect to a router via Ethernet adapter - install BROADCOM Wireless Linux STA drivers offline, following this guide from @Pilot6: offline install

  • I cant do that becouse I dont have imternet connection :/ – user3396072 Oct 11 '15 at 10:18
  • @user3396072 I gave you a link to my answer with directions how to install this driver offline. – Pilot6 Oct 11 '15 at 10:20
  • @user3396072: for clarity: Pilot6 is referring to this one – Fabby Oct 11 '15 at 13:29
  • You may mention disabling secure boot in case of troubleshooting. – Pandya Jul 1 '17 at 2:52

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