相关疑难解决方法(0)

自从升级（全新安装）到 Trusty（Kubuntu - EDIT 和现在的 Ubuntu vanilla，我切换回进一步解决这个问题）我注意到网络问题。

恰好每两分钟我的网络就会崩溃一会儿，但很快又重新上线。这清楚地反映在系统日志中：

Apr 24 07:52:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 07:52:51 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 07:54:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 07:54:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 07:56:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 07:56:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 07:58:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 07:58:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:00:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED …

OpenWrt中有一个CONFIG_ATH_USER_REGD变量允许用户覆盖无线网卡的默认设置。不幸的是，greping Arch 内核配置似乎没有这个功能，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东西还是在 compat-wireless 中提供的东西。

[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), …