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How to solve: No wireless network in Ubuntu 11.04 : Centrino Wireless-N 1000

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Wireless and Ubuntu never go hand in hand. No version of Ubuntu has worked out of box for all wireless hardware. This post is meant for people who has Centrino Wireless-N 1000 wireless adapter. If you do not know what is the make of your hardware, follow this link: Know your Network Adapter.

If your network Adapter is of Broadcom BCM 43XX series, you may want to follow this link: Wireless problem with Broadcom in Ubuntu 11.04

Problem Detection:

Now if you are still here I assume that you have a Centrino Wireless adapter from Intel. Run the following command:

 sudo rfkill list 
1: phy0: Wireless LAN
    Soft blocked: yes
    Hard blocked: no
2: acer-wireless: Wireless LAN
    Soft blocked: yes
    Hard blocked: no

Instead of acer-wireless, there may be other result as well. If it says Soft blocked: YES that means the wireless is turned off in software. Follow these solutions.

Solution 1:

If you are connected to Ethernet (Wired Network) disconnect it and type this command:

sudo rfkill unblock all 
sudo rfkill list all

Solution 2: 

If the above command does not solve the problem. Try with this command (replace the acer with your result in previous command output ):

sudo rmmod -f acer-wmi 
sudo rfkill unblock all 
sudo rfkill list all

Make the changes permanent:

If the above mentioned solution worked then you might want to make it permanent by amending a few lines in the configuration file so that you don’t need to type these commands again and again on each boot. Type the following commands (again replacing “acer”): 

sudo su 
echo "blacklist acer-wmi" >> /etc/modprobe.d/blacklist.conf 
exit

Hopefully this works for you all! Questions, suggestions and feedbacks are welcomed. If you liked the post then please acknowledge it by liking/voting/commenting on the post. Enjoy :)

Sources: Ubuntu Forums

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  • ht3t

    It didn’t work for me. When I type

    $ sudo rfkill

    I got only this..

    0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

    • https://computerandyou.net/ Abhishek Prakash

      did you try solution 2 .. and could you give more details about your hardware?

      • ht3t

        yes, I did. I typed this command

        sudo rmmod -f msi-wmi

        but I got this…

        Removing ‘msi_wmi’: No such file or directory.

        I have no idea because I’m new to ubuntu.

        $ lspci
        00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02)
        00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 02)
        00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02)
        00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
        00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
        00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
        00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05)
        00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05)
        00:1c.3 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 (rev 05)
        00:1c.5 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 6 (rev 05)
        00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
        00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5)
        00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05)
        00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05)
        00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05)
        00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05)
        01:00.0 VGA compatible controller: nVidia Corporation GT216 [GeForce GT 325M] (rev a2)
        06:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000
        07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)
        3f:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
        3f:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
        3f:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
        3f:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02)
        3f:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
        3f:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
        00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 02)
        00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02)
        00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
        00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
        00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
        00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05)
        00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05)
        00:1c.3 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 (rev 05)
        00:1c.5 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 6 (rev 05)
        00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
        00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5)
        00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05)
        00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05)
        00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05)
        00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05)
        01:00.0 VGA compatible controller: nVidia Corporation GT216 [GeForce GT 325M] (rev a2)
        06:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000
        07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)
        3f:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
        3f:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
        3f:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
        3f:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02)
        3f:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
        3f:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02)

  • Moatra

    thank you very much , you helped me :) worked for me z570

    • https://computerandyou.net/ Abhishek Prakash

      You are welcome Moatra..