The CRDA (Central Regulatory Domain Agent) utility has been used as a user space helper to load regulatory information for WiFi drivers. However, since Linux 4.15 the kernel can load the regulatory information directly from a signed firmware file "regulatory.db". The regulatory.db file is provided by the WIRELESS_REGDB package, which has been already installed since its a dependency of CRDA. Drop CRDA and select WIRELESS_REGDB package explicitly to make sure the regulatory.db file is present.
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