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https://himself.wordpress.com/2014/09/12/ac66u-failed-to-execute-sbin-preinit-ctf-module-license-proprietary-taints-kernel-wlc_phy_cal_init_acphy-not-implemented/
ac66u Failed to execute /sbin/preinit ctf: module license 'Proprietary' taints kernel. wlc_phy_cal_init_acphy: NOT Implemented