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Regulatory domain warnings in system log

Warning messages:

cfg80211: Loading compiled-in X.509 certificates for regulatory database
cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
platform regulatory.0 Direct firmware load for regulatory.db failed with error -2
cfg80211: failed to load regulatory.db

The explanation can be found here:

Summary of steps to resolve the message:

  1. Install crda package
  2. Reboot to reload cfg80211 module
  3. # iw reg set US (or any country code you want)

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