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  • [SOLVED] Wifi is disabled or possibly hard blocked on Lenovo - RHEL 7

    Posted on

    I've spent days on trying to get my wireless to work on my Lenovo Legion Y720. I am unable to understand why it's not working when the drivers are detected at boot using dmesg:

    [   16.089403] iwlwifi 0000:02:00.0: loaded firmware version 21.302800.0 op_mode iwlmvm
    [   16.105606] iwlwifi 0000:02:00.0: Detected Intel(R) Dual Band Wireless AC 8265, REV=0x230
    [   16.107786] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
    [   16.108187] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
    

    iwconfig
    lists:

    wlp2s0    IEEE 802.11  ESSID:off/any  
              Mode:Managed  Access Point: Not-Associated   Tx-Power=0 dBm   
              Retry short limit:7   RTS thr:off   Fragment thr:off
              Encryption key:off
              Power Management:on
    
    lo        no wireless extensions.
    
    virbr0-nic  no wireless extensions.
    
    virbr0    no wireless extensions.
    
    enp7s0    no wireless extensions.
    

    I am also running the latest

    NetworkManager
    and
    NetworkManager-wifi
    :

    NetworkManager-1.4.0-20.el7_3.x86_64
    NetworkManager-wifi-1.4.0-20.el7_3.x86_64
    
    lspci | grep Network :
    02:00.0 Network controller: Intel Corporation Device 24fd (rev 78)
    

    The

    rfkill list all
    command shows:

    0: ideapad_wlan: Wireless LAN
        Soft blocked: no
        Hard blocked: yes
    1: ideapad_bluetooth: Bluetooth
        Soft blocked: no
        Hard blocked: yes
    2: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
    3: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
    

    lshw -C network
    for the disabled wireless shows the following:

      *-network DISABLED        
           description: Wireless interface
           product: Intel Corporation
           vendor: Intel Corporation
           physical id: 0
           bus info: pci@0000:02:00.0
           logical name: wlp2s0
           version: 78
           serial: 86:2e:60:12:1b:1c
           width: 64 bits
           clock: 33MHz
           capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
           configuration: broadcast=yes driver=iwlwifi driverversion=3.10.0-514.21.1.el7.x86_64 firmware=21.302800.0 latency=0 link=no multicast=yes wireless=IEEE 802.11
           resources: irq:136 memory:94000000-94001fff
    

    cat /var/lib/NetworkManager/NetworkManager.state
    gives me:

    [main]
    NetworkingEnabled=true
    WirelessEnabled=true
    WWANEnabled=true
    

    The contents of my /etc/NetworkManager/NetworkManager.conf file are:

    [main]
    plugins=ifcfg-rh
    

    Any help would be much appreciated,

    thx

    EDIT: SOLUTION:

    Had to blacklist

    ideapad_laptop
    kernel module and reboot:

    sudo tee /etc/modprobe.d/blacklist-ideapad.conf  "blacklist ideapad_laptop"
    

    I guess a hard block can be caused by multiple modules and/or firmware trying to use the same device.

    Original forum where I found the solution:

    https://askubuntu.com/questions/893384/wifi-doesnt-work-on-fresh-ubuntu-16-04

    by

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