我的问题是，有些 WiFi 无法连接，而其他 WiFi 仍能使用。一周前一切都正常。我的手机创建的移动热点仍然正常工作。
这个问题更普遍，因为我经常让笔记本进入睡眠状态，而不是关机。我检查了这个问题Ubuntu 14.04 恢复后无线网络不工作，但这并没有帮助。
我将非常感激任何帮助，包括可以提供更多见解的日志指针等。
话虽如此，很抱歉标题含糊不清，请随意编辑以澄清。
究竟发生了什么
- 我（重新）开始。
- 网络管理器图标显示已连接的 WiFi。
- 快速连续地显示以下通知：
- 我的无线网络： 联系我的无线网络停用
- 无线接口（wlan0）：未提供任何秘密
- 连接断开，网络管理器显示“正在搜索”，然后显示“连接”图标。
- 进行了多次重试（约 3 次）。每次重试都会显示以下两个通知：
- 我的无线网络： 联系我的无线网络停用
- 无线接口（wlan0）：IP 配置不可用。
- 重试后，网络管理员会显示一个问号并放弃。
硬件：
联想 ThinkPad T540p
$ sudo lshw -c network
*-network
description: Wireless interface
product: Wireless 7260
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:04:00.0
logical name: wlan0
version: bb
serial: 5c:c5:d4:e0:1c:94
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=3.16.0-52-generic firmware=25.228.9.0 ip=192.168.43.77 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
resources: irq:47 memory:f2800000-f2801fff
...
日志
其中摘录的内容dmesg展示了断开与正常工作的 WiFi 的连接、连接到、失败并重新连接到正常工作的 WiFi。
[ 1916.725149] wlan0: deauthenticating from 80:37:73:da:06:c0 by local choice (Reason: 3=DEAUTH_LEAVING)
[ 1916.740742] cfg80211: Calling CRDA to update world regulatory domain
[ 1916.743159] cfg80211: World regulatory domain updated:
[ 1916.743162] cfg80211: DFS Master region: unset
[ 1916.743163] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 1916.743166] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1916.743169] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1916.743171] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1916.743172] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1916.743173] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1916.743184] cfg80211: Calling CRDA for country: DE
[ 1916.744992] cfg80211: Regulatory domain changed to country: DE
[ 1916.744994] cfg80211: DFS Master region: unset
[ 1916.744995] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 1916.744997] cfg80211: (2400000 KHz - 2483500 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 1916.744998] cfg80211: (5150000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 1916.744999] cfg80211: (5250000 KHz - 5350000 KHz @ 40000 KHz), (N/A, 2000 mBm), (0 s)
[ 1916.745000] cfg80211: (5470000 KHz - 5725000 KHz @ 40000 KHz), (N/A, 2698 mBm), (0 s)
[ 1916.745002] cfg80211: (57240000 KHz - 65880000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A)
[ 1919.554137] wlan0: authenticate with 80:37:73:da:06:c0
[ 1919.556786] wlan0: send auth to 80:37:73:da:06:c0 (try 1/3)
[ 1919.558598] wlan0: authenticated
[ 1919.562481] wlan0: associate with 80:37:73:da:06:c0 (try 1/3)
[ 1919.566024] wlan0: RX AssocResp from 80:37:73:da:06:c0 (capab=0x411 status=0 aid=2)
[ 1919.567199] wlan0: associated
[ 1921.188286] wlan0: deauthenticating from 80:37:73:da:06:c0 by local choice (Reason: 3=DEAUTH_LEAVING)
[ 1921.191810] cfg80211: Calling CRDA to update world regulatory domain
[ 1921.196341] cfg80211: World regulatory domain updated:
[ 1921.196343] cfg80211: DFS Master region: unset
[ 1921.196345] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 1921.196347] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1921.196348] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1921.196349] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1921.196350] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1921.196351] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1921.196500] cfg80211: Calling CRDA for country: DE
[ 1921.198385] cfg80211: Regulatory domain changed to country: DE
[ 1921.198388] cfg80211: DFS Master region: unset
[ 1921.198388] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 1921.198390] cfg80211: (2400000 KHz - 2483500 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 1921.198391] cfg80211: (5150000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 1921.198392] cfg80211: (5250000 KHz - 5350000 KHz @ 40000 KHz), (N/A, 2000 mBm), (0 s)
[ 1921.198393] cfg80211: (5470000 KHz - 5725000 KHz @ 40000 KHz), (N/A, 2698 mBm), (0 s)
[ 1921.198394] cfg80211: (57240000 KHz - 65880000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A)
[ 1924.652612] wlan0: authenticate with 02:1a:11:fb:34:fc
[ 1924.655299] wlan0: send auth to 02:1a:11:fb:34:fc (try 1/3)
[ 1924.657106] wlan0: authenticated
[ 1924.660085] wlan0: associate with 02:1a:11:fb:34:fc (try 1/3)
[ 1924.667085] wlan0: RX AssocResp from 02:1a:11:fb:34:fc (capab=0x411 status=0 aid=1)
[ 1924.667930] wlan0: associated
[ 1924.667980] cfg80211: Calling CRDA for country: DE
[ 1924.669881] cfg80211: Regulatory domain changed to country: DE
[ 1924.669884] cfg80211: DFS Master region: unset
[ 1924.669885] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 1924.669887] cfg80211: (2400000 KHz - 2483500 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 1924.669888] cfg80211: (5150000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 1924.669890] cfg80211: (5250000 KHz - 5350000 KHz @ 40000 KHz), (N/A, 2000 mBm), (0 s)
[ 1924.669891] cfg80211: (5470000 KHz - 5725000 KHz @ 40000 KHz), (N/A, 2698 mBm), (0 s)
[ 1924.669892] cfg80211: (57240000 KHz - 65880000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A)
[ 1924.687721] wlan0: Limiting TX power to 20 (20 - 0) dBm as advertised by 02:1a:11:fb:34:fc
[ 1924.700790] wlan0: deauthenticating from 02:1a:11:fb:34:fc by local choice (Reason: 2=PREV_AUTH_NOT_VALID)
[ 1924.710385] wlan0: authenticate with 02:1a:11:fb:34:fc
[ 1924.712791] wlan0: send auth to 02:1a:11:fb:34:fc (try 1/3)
[ 1924.713015] cfg80211: Calling CRDA to update world regulatory domain
[ 1924.714585] wlan0: authenticated
[ 1924.714660] cfg80211: World regulatory domain updated:
[ 1924.714663] cfg80211: DFS Master region: unset
[ 1924.714665] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 1924.714667] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1924.714668] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1924.714669] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1924.714670] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1924.714672] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1924.714680] cfg80211: Calling CRDA for country: DE
[ 1924.716136] wlan0: associate with 02:1a:11:fb:34:fc (try 1/3)
[ 1924.716148] cfg80211: Regulatory domain changed to country: DE
[ 1924.716150] cfg80211: DFS Master region: unset
[ 1924.716151] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 1924.716152] cfg80211: (2400000 KHz - 2483500 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 1924.716153] cfg80211: (5150000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 1924.716155] cfg80211: (5250000 KHz - 5350000 KHz @ 40000 KHz), (N/A, 2000 mBm), (0 s)
[ 1924.716155] cfg80211: (5470000 KHz - 5725000 KHz @ 40000 KHz), (N/A, 2698 mBm), (0 s)
[ 1924.716156] cfg80211: (57240000 KHz - 65880000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A)
[ 1924.723515] wlan0: RX AssocResp from 02:1a:11:fb:34:fc (capab=0x411 status=0 aid=1)
[ 1924.724258] wlan0: associated
[ 1924.724293] cfg80211: Calling CRDA for country: DE
[ 1924.725783] cfg80211: Regulatory domain changed to country: DE
[ 1924.725786] cfg80211: DFS Master region: unset
[ 1924.725787] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 1924.725789] cfg80211: (2400000 KHz - 2483500 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 1924.725790] cfg80211: (5150000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 1924.725792] cfg80211: (5250000 KHz - 5350000 KHz @ 40000 KHz), (N/A, 2000 mBm), (0 s)
[ 1924.725793] cfg80211: (5470000 KHz - 5725000 KHz @ 40000 KHz), (N/A, 2698 mBm), (0 s)
[ 1924.725794] cfg80211: (57240000 KHz - 65880000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A)
[ 1924.793764] wlan0: Limiting TX power to 20 (20 - 0) dBm as advertised by 02:1a:11:fb:34:fc
答案1
尽管这个答案可能没有太大帮助，但也许它能提供一些结论。
除了“重新启动直到我再次工作”之外，我从未找到解决此问题的方法。但是，在更新到 16.04 后，错误（尚未）再次出现，并且一切运行顺利。因此，更新到较新的版本为我解决了这个问题。