Ubuntu 18.04 - Wireless Adapter not Found

Ask Ubuntu Asked by aidan3776 on January 3, 2022

My wifi spuriously failed to connect this morning. Last night, left it asleep, working just fine and this morning it was unable to connect to the internet with a
No-Wifi-Adapter-Found error.

  • sudo lshw -c network:
  *-network UNCLAIMED       
       description: Network controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 14.3
       bus info: pci@0000:00:14.3
       version: 30
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix cap_list
       configuration: latency=0
       resources: memory:911a4000-911a7fff
       description: Ethernet interface
       physical id: 2
       logical name: enp0s20f0u4
       serial: ae:6c:d3:65:74:87
       capabilities: ethernet physical
       configuration: broadcast=yes driver=rndis_host driverversion=22-Aug-2005 firmware=RNDIS device ip= link=yes multicast=yes
  • iw list: no output.
    sudo rfkill list:
    Soft blocked: no
    Hard blocked: no
  • iwconfig: no wireless connections for lo and eth.

  • sudo dmesg | grep iwl :

[ 351.373357] psmouse ahci intel_ish_ipc libahci intel_ishtp i2c_hid hid wmi pinctrl_cannonlake video pinctrl_intel [last unloaded: iwlwifi] [ 351.373407] RIP: 0010:iwl_pci_probe+0x4da/0x540 [iwlwifi] [ 351.373520] iwl_pci_register_driver+0x24/0x40 [iwlwifi] [ 351.373547] __init_backport+0xb8/0xe0 [iwlwifi] [ 351.406765] iwlwifi: probe of 0000:00:14.3 failed with error -22

I have

  • restarted several times
  • disabled Secure Boot
  • ran sudo rfkill unblock all
  • ran sudo rmmod iwlmvm && sudo modprobe iwlmvm
  • ransudo service network-manager restart
  • unpacked the iwlwifi 5.2+ firmware into lib/firmware
  • changed wifi.powersave to 2 in /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf
  • ran modprobe iwlwifi 11n_disable=1 bt_coex_active=0
  • ran
    sudo apt update sudo apt install git build-essential git clone cd backport-iwlwifi/ make defconfig-iwlwifi-public sed -i 's/CPTCFG_IWLMVM_VENDOR_CMDS=y/# CPTCFG_IWLMVM_VENDOR_CMDS is not set/' .config make -j4 sudo make install sudo modprobe iwlwifi

I’m at my wits end, any advice on how to fix would be much appreciated. Thanks so much!!

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