有一个CONFIG_ATH_USER_REGD变量开放Wrt允许用户覆盖无线 NIC 的默认设置。不幸的是，grepping Arch 内核配置似乎没有这个，而且由于 OpenWrt 有相当多的黑客和补丁，我不知道这是他们添加的还是在 compat-wireless 中提供的。
Ubuntu 或 BackTrack-Linux 是否存在此设置？
更新 我认为 CRDA 不会对此带来任何好处。
[10661.269580] cfg80211: Restoring regulatory settings while preserving user preference for: BO
[10661.269589] cfg80211: Calling CRDA to update world regulatory domain
[10661.276975] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[10661.276982] cfg80211: World regulatory domain updated:
[10661.276986] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[10661.276992] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[10661.276998] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[10661.277003] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[10661.277008] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[10661.277014] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[10661.277036] cfg80211: Calling CRDA for country: BO
[10661.285251] cfg80211: Ignoring regulatory request Set by user since the driver requires its own regulatory domain to be set first
[10661.285258] cfg80211: Regulatory domain changed to country: BO
[10661.285262] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[10661.285268] cfg80211: (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 3000 mBm)
[10661.285273] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (N/A, 3000 mBm)
阅读更多http://wireless.kernel.org/en/users/Drivers/ath
Atheros 设备共享相同的监管实施。所有设备均在其 EEPROM 中编程了一个监管域代码。编程的监管域代码可分为三类：
自定义世界监管域 编程 ISO-3166-1 数字国家代码（有少数例外） 监管对组编号
答案1
我昨天也遇到了和你一样的问题，经过一番尝试，找到了解决办法：
sudo apt-get install crda
sudo vi /etc/default/crda
然后将该行更改REGDOMAIN=为您的国家代码，例如。
REGDOMAIN=AU
然后重新启动。
顺便说一句，我的系统是 Ubuntu 12.04，带有 3.2.x 内核和 AR9485 无线。