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Sat, 3 Oct 2015 22:52:07 +0100 Peter Nikolic <pg.nikolic1@gmail.com>:
No idea, but Google is full of similar issues for "crda" and "country 97". And I don't think this is going any further unless you tell exactly what wifi adapter you have (from dmesg and/or lspci), what's the access point, where you purchased both, what band (2,4/5 GHz) and channel you have configured, and what the country setting should be (one mail you wrote "JP", the next it was "US").
I'd strongly suggest you go over https://wiki.archlinux.org/index.php/Wireless_network_configuration#Respecti... and perhaps try the part about setting the country via cfg80211 options in modprobe.conf.
I've just repeat all these steps. It is hard to guess why, but now problem has gone. I'm wonder. wpa_supplicant: country='JP' kernel: cfg80211: Calling CRDA for country: JP kernel: cfg80211: Regulatory domain changed to country: JP kernel: cfg80211: DFS Master region: JP - -- _ ~~~ This PGP signature only certifies the sender and date of the message. It implies no approval from the administrators of nym.mixmin.net. Date: Tue Oct 6 07:44:57 2015 GMT From: flow@nym.mixmin.net -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlYTe/kACgkQViYZwngkfDvLuQCgp+rTjbA96Br0Uz0QtHfOVuRq et4An1FiitWb87AQkAdQ4smmyYoCZPr4 =YbMZ -----END PGP SIGNATURE-----