https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=216923

d...@ukrhub.net changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Hardware|i386                        |Any

--- Comment #1 from d...@ukrhub.net ---
Those were facts, now it's time to my observations and assumptions.

Another incarnation of the same(IMO) bug may be reproduced by 'touching' the
country/regdomain settings.  (Under 'touching' I mean 'changing to other value
and rolling back').  Thus, on a freshly booted system, one may run the
following:
------------------------------------------------------------------------
d610% ifconfig wlan0
ifconfig: interface wlan0 does not exist

d610# ifconfig wlan0 create wlandev iwi0
d610# ifconfig wlan0 country US
d610# ifconfig wlan0 list chan
Channel   1 : 2412  MHz 11g          Channel  11 : 2462  MHz 11g
Channel   2 : 2417  MHz 11g          Channel  36 : 5180  MHz 11a
Channel   3 : 2422  MHz 11g          Channel  40 : 5200  MHz 11a
Channel   4 : 2427  MHz 11g          Channel  44 : 5220  MHz 11a
Channel   5 : 2432  MHz 11g          Channel  48 : 5240  MHz 11a
Channel   6 : 2437  MHz 11g          Channel 149 : 5745  MHz 11a
Channel   7 : 2442  MHz 11g          Channel 153 : 5765  MHz 11a
Channel   8 : 2447  MHz 11g          Channel 157 : 5785  MHz 11a
Channel   9 : 2452  MHz 11g          Channel 161 : 5805  MHz 11a
Channel  10 : 2457  MHz 11g

d610# ifconfig wlan0 country DE
d610# ifconfig wlan0 country US
d610# ifconfig wlan0 list chan
Channel   1 : 2412  MHz 11g          Channel   9 : 2452  MHz 11g
Channel   2 : 2417  MHz 11g          Channel  10 : 2457  MHz 11g
Channel   3 : 2422  MHz 11g          Channel  11 : 2462  MHz 11g
Channel   4 : 2427  MHz 11g          Channel  36 : 5180  MHz 11a
Channel   5 : 2432  MHz 11g          Channel  40 : 5200  MHz 11a
Channel   6 : 2437  MHz 11g          Channel  44 : 5220  MHz 11a
Channel   7 : 2442  MHz 11g          Channel  48 : 5240  MHz 11a
Channel   8 : 2447  MHz 11g
d610#
------------------------------------------------------------------------

  Note, that touching regulatory settings effectively shrinked the list of
available channels: 149,153,157,161 are missing.

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