During boot, this message appears, but it doesn't appear in dmesg ifconfig: SIOCIFCREATE2: Device not configured After I plug the Netgear A6100 AC600 DB Wireless Adapter [Realtek RTL8811AU] in, I get ugen0.5: <Realtek 802.11ac WLAN Adapter> at usbus0 rtwn0 on uhub0 rtwn0: <802.11ac WLAN Adapter > on usbus0 rtwn0: MAC/BB RTL8821AU, RF 6052 1T1R followed by: Feb 20 13:06:12 FreeBSD wpa_supplicant[1548]: ioctl[SIOCS80211, op=20, val=0, arg_len=7]: Invalid argument Feb 20 13:06:12 FreeBSD syslogd: last message repeated 1 times Feb 20 13:06:15 FreeBSD wpa_supplicant[1549]: Failed to add supported operating classes IE Applicable lines from /etc/rc.conf: create_args_wlan0="country US regdomain FCC" ifconfig_wlan0="ssid ByteMe WPA DHCP" wlans_rtwn0="wlan0" I am able to use the wireless connection just fine. I have these lines in my custom kernel: device rtwn # Netgear A6100 AC600 DB Wireless Adapter [Realtek RTL8811AU] device rtwnfw device rtwn_pci device rtwn_usb Here's my system: HP-Slimline 290-p0014 Desktop using integrated UHD Graphics 630 FreeBSD FreeBSD 12.2-RELEASE-p4 FreeBSD 12.2-RELEASE-p4 r369434 Special amd64 Path: /usr/ports Working Copy Root Path: /usr/ports URL: https://svn.freebsd.org/ports/head Relative URL: ^/head Repository Root: https://svn.freebsd.org/ports Repository UUID: 35697150-7ecd-e111-bb59-0022644237b5 Revision: 567992 Node Kind: directory Schedule: normal Last Changed Author: vd Last Changed Rev: 567992 Last Changed Date: 2021-03-10 05:29:13 -0500 (Wed, 10 Mar 2021)