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I have been install Ubuntu 14.04 on laptop Lenovo V580c. All components are working OK, but WiFi isn't working.

I searched answers in Google, Askubuntu, but nothing works

Please, help

03:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)

Thanks.

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  • What your output for rfkill list?
    – DJ_Beardsquirt
    Commented Feb 25, 2015 at 12:47
  • '0: tpacpi_bluetooth_sw: Bluetooth Soft blocked: yes Hard blocked: no' only this
    – Vladyslav
    Commented Feb 25, 2015 at 12:48
  • It's not good that your wireless driver isn't listed there. Update your question with the output for sudo lshw -C network
    – DJ_Beardsquirt
    Commented Feb 25, 2015 at 12:50
  • Sorry, I'm a new user on this website, I can't found button "edit question" so I can show the list here <code> *-network 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: bus_master cap_list configuration: driver=bcma-pci-bridge latency=0 resources: irq:17 memory:f3500000-f3507fff</code>
    – Vladyslav
    Commented Feb 25, 2015 at 12:55
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    Yes, it says 'This devise is using an alternative driver'. I already did this operation a few hours ago, but nothing changed
    – Vladyslav
    Commented Feb 25, 2015 at 13:02

3 Answers 3

Reset to default
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With a computer with working internet go to http://packages.ubuntu.com/utopic/amd64/bcmwl-kernel-source/download and select a mirror site to dowload from. Copy the file to a USB, DVD or whatever to get in on the Ubuntu pc and double click on it to install

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  • Just use thist method and listen to @Jeremy31; and @jessenorton; :) Thanks a lot!
    – Vladyslav
    Commented Feb 25, 2015 at 15:10
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My laptop has the same wireless hardware. The easy solution is: When you install ubuntu, check the box which says install third party software(wireless driver included in that). Then everything works out of box.

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  • to install them after an installation run sudo apt-get install ubuntu-restricted-extras
    – DJ_Beardsquirt
    Commented Feb 25, 2015 at 13:30
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    No wifi, no connection to internet. The package ubuntu-restricted-extras is for things like playing video files, the wireless driver is not included.
    – Tom
    Commented Feb 25, 2015 at 13:33
  • Ah, yeah. I was assuming he still had ethernet but I just re-read his comments and noticed that he doesn't have ethernet on his machine.
    – DJ_Beardsquirt
    Commented Feb 25, 2015 at 13:35
  • I should reinstall my Ubuntu system? Can you give me a screenshot of that checkbox, please?
    – Vladyslav
    Commented Feb 25, 2015 at 13:44
  • cdn5.howtogeek.com/wp-content/uploads/2013/04/… I also suggest selecting Download updates while installing
    – DJ_Beardsquirt
    Commented Feb 25, 2015 at 13:50
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Do the command:

sudo gedit /etc/NetworkManager/NetworkManager.conf

This will open up that file in a text editor. Change the line that has managed= to:

managed=true

Save and close the file, then do:

sudo killall NetworkManager

Logout and log back in again. Answer taken from: Ubuntu 12.10 - network manager not listing wireless networks

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  • After that, I have some system problems, but wi-fi isn't shown
    – Vladyslav
    Commented Feb 25, 2015 at 13:40
  • What system problems did it cause?
    – DJ_Beardsquirt
    Commented Feb 25, 2015 at 13:42
  • I have no idea, it shows, call me about problem, and hides
    – Vladyslav
    Commented Feb 25, 2015 at 13:45
  • Okay, undo the changes. use sudo gedit /etc/NetworkManager/NetworkManager.conf to open the network manager configuration file and remove the line managed=true. Save and exit, then run sudo killall NetworkManager. After logging out and in again follow the instructions by @Jeremy31 at: askubuntu.com/a/589786/143396
    – DJ_Beardsquirt
    Commented Feb 25, 2015 at 13:48
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    By the way, I don't remove the line managed=true to false, and it works Now, I'll reinstall ubuntu system, do the same way to create wireless connection and will write here, for describe what happened It'll take about 30 min
    – Vladyslav
    Commented Feb 25, 2015 at 14:15

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