在 Kubuntu 中，奇怪的是，Wifi 会完全断开约 5 到 30 秒，然后重新连接。此问题可能由什么原因造成？
我的笔记本电脑信息：Kubunu 15.10 KDE plasma 5.4.2 内核版本 4.2.0-27-generic
请告诉我我需要分享哪些其他信息。（这家伙分享了很多信息但没人回答！）
更新 1：输出lspci -knn | grep Net -A2
02:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)
Subsystem: Hewlett-Packard Company Device [103c:1508]
Kernel driver in use: b43-pci-bridge
更新 2：输出grep wlan /var/log/kern.log
Feb 7 13:29:45 HP kernel: [ 20.420557] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 13:30:34 HP kernel: [ 69.472388] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 13:30:34 HP kernel: [ 69.557596] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 13:30:41 HP kernel: [ 76.132410] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 13:30:49 HP kernel: [ 84.516376] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 13:30:50 HP kernel: [ 84.595066] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 13:48:26 HP kernel: [ 20.763486] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 13:48:31 HP kernel: [ 26.496351] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 13:48:32 HP kernel: [ 26.768843] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 13:50:02 HP kernel: [ 117.425032] wlan0: authenticate with a4:b1:e9:9c:f0:96
Feb 7 13:50:02 HP kernel: [ 117.448664] wlan0: send auth to a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 13:50:02 HP kernel: [ 117.453951] wlan0: authenticated
Feb 7 13:50:02 HP kernel: [ 117.456283] wlan0: associate with a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 13:50:02 HP kernel: [ 117.459509] wlan0: RX AssocResp from a4:b1:e9:9c:f0:96 (capab=0x411 status=0 aid=5)
Feb 7 13:50:02 HP kernel: [ 117.459902] wlan0: associated
Feb 7 13:50:02 HP kernel: [ 117.459936] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Feb 7 13:50:05 HP kernel: [ 120.472723] wlan0: deauthenticated from a4:b1:e9:9c:f0:96 (Reason: 2=PREV_AUTH_NOT_VALID)
Feb 7 13:50:34 HP kernel: [ 149.401202] wlan0: authenticate with a4:b1:e9:9c:f0:96
Feb 7 13:50:34 HP kernel: [ 149.424614] wlan0: send auth to a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 13:50:34 HP kernel: [ 149.427180] wlan0: authenticated
Feb 7 13:50:34 HP kernel: [ 149.428251] wlan0: associate with a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 13:50:34 HP kernel: [ 149.431222] wlan0: RX AssocResp from a4:b1:e9:9c:f0:96 (capab=0x411 status=0 aid=5)
Feb 7 13:50:34 HP kernel: [ 149.431620] wlan0: associated
Feb 7 14:08:38 HP kernel: [ 1232.119261] wlan0: deauthenticating from a4:b1:e9:9c:f0:96 by local choice (Reason: 3=DEAUTH_LEAVING)
Feb 7 14:11:40 HP kernel: [ 19.752909] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 14:12:37 HP kernel: [ 77.492458] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 14:12:37 HP kernel: [ 77.555537] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 14:13:18 HP kernel: [ 117.789036] wlan0: authenticate with a4:b1:e9:9c:f0:96
Feb 7 14:13:18 HP kernel: [ 117.812648] wlan0: send auth to a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 14:13:18 HP kernel: [ 117.815753] wlan0: authenticated
Feb 7 14:13:18 HP kernel: [ 117.820065] wlan0: associate with a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 14:13:18 HP kernel: [ 117.823603] wlan0: RX AssocResp from a4:b1:e9:9c:f0:96 (capab=0x411 status=0 aid=1)
Feb 7 14:13:18 HP kernel: [ 117.823995] wlan0: associated
Feb 7 14:13:18 HP kernel: [ 117.824061] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Feb 7 15:03:55 HP kernel: [ 22.797706] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:04:00 HP kernel: [ 28.544436] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:04:01 HP kernel: [ 28.970856] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:04:02 HP kernel: [ 30.131941] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:05:25 HP kernel: [ 113.041220] wlan0: authenticate with a4:b1:e9:9c:f0:96
Feb 7 15:05:25 HP kernel: [ 113.064676] wlan0: send auth to a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 15:05:25 HP kernel: [ 113.067027] wlan0: authenticated
Feb 7 15:05:25 HP kernel: [ 113.068181] wlan0: associate with a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 15:05:25 HP kernel: [ 113.071494] wlan0: RX AssocResp from a4:b1:e9:9c:f0:96 (capab=0x411 status=0 aid=1)
Feb 7 15:05:25 HP kernel: [ 113.071893] wlan0: associated
Feb 7 15:05:25 HP kernel: [ 113.071925] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Feb 7 15:38:07 HP kernel: [ 21.369331] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:38:13 HP kernel: [ 27.096353] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:38:13 HP kernel: [ 27.177568] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:38:14 HP kernel: [ 28.310506] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:40:39 HP kernel: [ 172.965166] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:40:39 HP kernel: [ 173.511667] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:41:02 HP kernel: [ 195.942446] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:41:03 HP kernel: [ 197.518776] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:41:04 HP kernel: [ 197.806099] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:41:04 HP kernel: [ 198.514786] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:41:34 HP kernel: [ 228.533349] wlan0: authenticate with a4:b1:e9:9c:f0:96
Feb 7 15:41:34 HP kernel: [ 228.556679] wlan0: send auth to a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 15:41:34 HP kernel: [ 228.559227] wlan0: authenticated
Feb 7 15:41:34 HP kernel: [ 228.560071] wlan0: associate with a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 15:41:34 HP kernel: [ 228.563334] wlan0: RX AssocResp from a4:b1:e9:9c:f0:96 (capab=0x411 status=0 aid=1)
Feb 7 15:41:34 HP kernel: [ 228.563767] wlan0: associated
Feb 7 15:41:34 HP kernel: [ 228.563807] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Feb 7 15:48:50 HP kernel: [ 664.353899] wlan0: deauthenticating from a4:b1:e9:9c:f0:96 by local choice (Reason: 3=DEAUTH_LEAVING)
Feb 7 15:49:02 HP kernel: [ 676.206188] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:49:38 HP kernel: [ 712.508721] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:49:38 HP kernel: [ 712.517050] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:49:39 HP kernel: [ 713.469383] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:49:39 HP kernel: [ 713.480442] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:49:39 HP kernel: [ 713.517817] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:49:39 HP kernel: [ 713.536570] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:49:40 HP kernel: [ 714.510608] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:49:40 HP kernel: [ 714.516118] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:50:26 HP kernel: [ 760.585066] wlan0: authenticate with a4:b1:e9:9c:f0:96
Feb 7 15:50:27 HP kernel: [ 760.608587] wlan0: send auth to a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 15:50:27 HP kernel: [ 760.611016] wlan0: authenticated
Feb 7 15:50:27 HP kernel: [ 760.612047] wlan0: associate with a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 15:50:27 HP kernel: [ 760.615341] wlan0: RX AssocResp from a4:b1:e9:9c:f0:96 (capab=0x411 status=0 aid=1)
Feb 7 15:50:27 HP kernel: [ 760.615782] wlan0: associated
Feb 7 15:50:27 HP kernel: [ 760.615823] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Feb 7 15:57:10 HP kernel: [ 20.856551] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:57:16 HP kernel: [ 26.592379] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:57:16 HP kernel: [ 26.672656] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:57:17 HP kernel: [ 27.805317] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:58:03 HP kernel: [ 74.526900] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:58:04 HP kernel: [ 75.229235] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:58:04 HP kernel: [ 75.251292] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:58:04 HP kernel: [ 75.265960] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:58:07 HP kernel: [ 78.177975] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:58:07 HP kernel: [ 78.509149] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:58:20 HP kernel: [ 90.837966] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:58:21 HP kernel: [ 92.520402] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:58:24 HP kernel: [ 94.947817] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:58:25 HP kernel: [ 96.510522] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:58:53 HP kernel: [ 124.386939] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 15:59:05 HP kernel: [ 135.653121] wlan0: authenticate with a4:b1:e9:9c:f0:96
Feb 7 15:59:05 HP kernel: [ 135.676663] wlan0: send auth to a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 15:59:05 HP kernel: [ 135.680144] wlan0: authenticated
Feb 7 15:59:05 HP kernel: [ 135.684069] wlan0: associate with a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 15:59:05 HP kernel: [ 135.687297] wlan0: RX AssocResp from a4:b1:e9:9c:f0:96 (capab=0x411 status=0 aid=1)
Feb 7 15:59:05 HP kernel: [ 135.687698] wlan0: associated
Feb 7 15:59:05 HP kernel: [ 135.687742] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Feb 7 16:23:36 HP kernel: [ 20.390421] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 16:23:42 HP kernel: [ 26.116384] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 16:23:42 HP kernel: [ 26.193417] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Feb 7 16:23:43 HP kernel: [ 27.340317] wlan0: authenticate with a4:b1:e9:9c:f0:96
Feb 7 16:23:43 HP kernel: [ 27.352602] wlan0: send auth to a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 16:23:43 HP kernel: [ 27.361461] wlan0: authenticated
Feb 7 16:23:43 HP kernel: [ 27.364150] wlan0: associate with a4:b1:e9:9c:f0:96 (try 1/3)
Feb 7 16:23:43 HP kernel: [ 27.374449] wlan0: RX AssocResp from a4:b1:e9:9c:f0:96 (capab=0x411 status=0 aid=1)
Feb 7 16:23:43 HP kernel: [ 27.374827] wlan0: associated
Feb 7 16:23:43 HP kernel: [ 27.374864] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
编辑 1：我试过了这个答案但它没有用。
答案1
您需要互联网连接：
运行以下命令：
sudo apt-get remove --purge bcmwl-kernel-source
安装 build-essential 和 linux-headers
sudo apt-get update && apt-get install build-essential linux-headers-generic
安装或重新安装 wpa_supplicant
sudo apt-get --reinstall install wpasupplicant
安装b43固件
sudo apt-get install firmware-b43-installer
和
sudo apt-get --reinstall install bcmwl-kernel-source
加载驱动程序
sudo modprobe b43
和
sudo ifdown wlan0
sudo ifup wlan0
您可以重新启动