When I run the following two commands, the first one returns without eror, but the second one gives me FATAL: Module iwlwifi is in use.

sudo ifconfig wlan0 down
sudo modprobe -r iwlwifi

If bringing the wireless interface down still leave the kernel module in use, what does that imply?

  • After you run ifconfig wlan0 down, have you run ifconfig again to make sure wlan0 is actually down ?
    – Lawrence
    Dec 23 '13 at 4:39
  • Yes, I did run ifconfig again to verify.
    – merlin2011
    Dec 23 '13 at 5:20

See if modprobe -rv iwlmvm helps instead.

Use iwldvm for older card types.

  • 3
    modprobe -rv iwlmvm for newer card types.
    – lkraav
    Nov 22 '15 at 17:25

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