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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 problem return back suddenly. kernel: cfg80211: World regulatory domain updated: kernel: cfg80211: DFS Master region: unset kernel: cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time) kernel: cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) kernel: cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) kernel: cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A) kernel: cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A) kernel: cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s) kernel: cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s) kernel: cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A) kernel: cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A) systemd-udevd[1366]: Process '/usr/bin/crda' failed with exit code 234. - -- _ ~~~ This PGP signature only certifies the sender and date of the message. It implies no approval from the administrators of nym.mixmin.net. Date: Sat Oct 10 05:45:50 2015 GMT From: flow@nym.mixmin.net -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlYYpg8ACgkQViYZwngkfDvQLACdGW24ZAI3fL+RsEbfY31bKoy7 jCEAnismvIlyYzOQCWzaDY5yIG0z+jQI =5gmc -----END PGP SIGNATURE-----