我用Ubuntu 14.04我有一个宏碁 V3-571G笔记本电脑。我有一台O2 盒子 6431我从 O2 收到的调制解调器。我的 wifi 连接工作正常，除非我重新启动 ubuntu 或笔记本电脑。下次它不会再连接。我可以看到内核和 o2 盒子之间有很多事情要做，我看到取消认证之间。dmesg输出如下：
[34154.787149] wlan0: deauthenticated from 18:83:bf:a6:a2:fc (Reason: 3)
[34154.872908] cfg80211: Calling CRDA to update world regulatory domain
[34154.878624] cfg80211: World regulatory domain updated:
[34154.878628] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[34154.878630] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[34154.878632] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[34154.878633] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[34154.878634] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[34154.878635] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[34158.386846] wlan0: authenticate with 18:83:bf:a6:a2:fc
[34158.406281] wlan0: send auth to 18:83:bf:a6:a2:fc (try 1/3)
[34158.408269] wlan0: authenticated
[34158.409813] wlan0: associate with 18:83:bf:a6:a2:fc (try 1/3)
[34158.438048] wlan0: RX AssocResp from 18:83:bf:a6:a2:fc (capab=0x411 status=0 aid=2)
[34158.438127] wlan0: associated
[34158.438267] cfg80211: Calling CRDA for country: DE
[34158.442413] ath: EEPROM regdomain: 0x8114
[34158.442416] ath: EEPROM indicates we should expect a country code
[34158.442418] ath: doing EEPROM country->regdmn map search
[34158.442419] ath: country maps to regdmn code: 0x37
[34158.442421] ath: Country alpha2 being used: DE
[34158.442422] ath: Regpair used: 0x37
[34158.442424] ath: regdomain 0x8114 dynamically updated by country IE
[34158.442447] cfg80211: Regulatory domain changed to country: DE
[34158.442448] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[34158.442450] cfg80211: (2400000 KHz - 2483500 KHz @ 40000 KHz), (N/A, 2000 mBm)
[34158.442452] cfg80211: (5150000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm)
[34158.442453] cfg80211: (5250000 KHz - 5350000 KHz @ 40000 KHz), (N/A, 2000 mBm)
[34158.442455] cfg80211: (5470000 KHz - 5725000 KHz @ 40000 KHz), (N/A, 2698 mBm)
[34158.442457] cfg80211: (57240000 KHz - 65880000 KHz @ 2160000 KHz), (N/A, 4000 mBm)
我们的家庭网络中还有许多其他设备，它们都运行良好。每次发生此故障时，无论我重新启动笔记本电脑或删除 wifi 连接并重新连接，它都不会连接，直到我重新启动调制解调器本身。
这是什么问题？我该如何解决？
PS 这里是iwconfig输出：
wlan0 IEEE 802.11abgn ESSID:"o2-WLAN84"
Mode:Managed Frequency:2.412 GHz Access Point: 18:83:BF:A6:A2:FC
Bit Rate=115.6 Mb/s Tx-Power=16 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=60/70 Signal level=-50 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:127 Missed beacon:0
更新
通过进一步搜索，我找到了解决方法2011 年的声明中写道：
对于某些人来说，关闭 wpa_supplicant 似乎可以解决这个问题
尽管它的工具很旧，我还是会尝试它并更新问题。
答案1
不是您的确切设置（笔记本电脑品牌/调制解调器），但很多日志似乎与您的相匹配。同样的问题，取消身份验证，原因 3
这是帖子。
这个人的解决方案是
sudo apt-get update && sudo apt-get install wicd
然后重新启动。
就像我说的，不同的设备，但类似的日志。在尝试我的答案之前，您可能需要先通读它们，以确保我没有遗漏任何东西。
但它解决了这个人的问题。