自 Trusty 以来的网络问题

Question

自 Trusty 以来的网络问题

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 
Apr 24 08:00:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:02:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:04:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:04:51 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:06:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:06:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:08:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:08:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:10:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:10:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:12:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:12:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:14:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:14:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:16:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:16:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:18:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:18:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Apr 24 08:20:45 jordan-TECRA-R840 wpa_supplicant[1271]: wlan0: CTRL-EVENT-SCAN-STARTED 
Apr 24 08:20:50 jordan-TECRA-R840 wpa_supplicant[1271]: nl80211: send_and_recv->nl_recvmsgs failed: -33

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我还没有花太多时间进行故障排除，我才刚刚安装了一天。我想知道是否有人以前见过这个问题？我不记得 3 天前我在 Ubuntu 13.10 上使用完全相同的硬件时看到过这个。

硬件：Tecra R840-S8430 网络控制器：Intel Corporation Centrino Advanced-N 6230 [Rainbow Peak] (rev 34) 口味：Kubuntu + Ubuntu 版本：14.04 LTS

更新 - 更多信息 (5/05/05)

是的，这似乎正在断开我的连接。这是来自典型丢弃的一些系统日志，我必须禁用/重新启用 wifi 才能恢复它：

May  5 09:29:57 Oban kernel: [74616.819616] wlan0: deauthenticated from 00:26:62:4f:c3:f6 (Reason: 6)
May  5 09:29:57 Oban wpa_supplicant[1368]: wlan0: CTRL-EVENT-DISCONNECTED bssid=00:26:62:4f:c3:f6 reason=6
May  5 09:29:57 Oban NetworkManager[1151]: <warn> Connection disconnected (reason 6)
May  5 09:29:57 Oban kernel: [74616.851674] cfg80211: Calling CRDA to update world regulatory domain
May  5 09:29:57 Oban wpa_supplicant[1368]: wlan0: SME: Trying to authenticate with 00:26:62:4f:c3:f6 (SSID='Air' freq=2462 MHz)
May  5 09:29:57 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: completed -> disconnected
May  5 09:29:57 Oban wpa_supplicant[1368]: wlan0: CTRL-EVENT-SCAN-STARTED 
May  5 09:29:57 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: disconnected -> authenticating
May  5 09:29:57 Oban kernel: [74616.921570] wlan0: authenticate with 00:26:62:4f:c3:f6
May  5 09:29:57 Oban kernel: [74616.925036] wlan0: send auth to 00:26:62:4f:c3:f6 (try 1/3)
May  5 09:29:57 Oban kernel: [74616.931650] cfg80211: World regulatory domain updated:
May  5 09:29:57 Oban kernel: [74616.931654] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
May  5 09:29:57 Oban kernel: [74616.931656] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74616.931658] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74616.931659] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74616.931661] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74616.931662] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74617.031487] wlan0: send auth to 00:26:62:4f:c3:f6 (try 2/3)
May  5 09:29:57 Oban kernel: [74617.035474] wlan0: authenticated
May  5 09:29:57 Oban wpa_supplicant[1368]: wlan0: Trying to associate with 00:26:62:4f:c3:f6 (SSID='Air' freq=2462 MHz)
May  5 09:29:57 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: authenticating -> associating
May  5 09:29:57 Oban kernel: [74617.039506] wlan0: associate with 00:26:62:4f:c3:f6 (try 1/3)
May  5 09:29:57 Oban kernel: [74617.043029] wlan0: RX AssocResp from 00:26:62:4f:c3:f6 (capab=0x431 status=0 aid=4)
May  5 09:29:57 Oban wpa_supplicant[1368]: wlan0: Associated with 00:26:62:4f:c3:f6
May  5 09:29:57 Oban kernel: [74617.050233] wlan0: associated
May  5 09:29:57 Oban kernel: [74617.050393] cfg80211: Calling CRDA for country: US
May  5 09:29:57 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: associating -> associated
May  5 09:29:57 Oban kernel: [74617.056664] cfg80211: Regulatory domain changed to country: US
May  5 09:29:57 Oban kernel: [74617.056673] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
May  5 09:29:57 Oban kernel: [74617.056679] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
May  5 09:29:57 Oban kernel: [74617.056685] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
May  5 09:29:57 Oban kernel: [74617.056690] cfg80211:   (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74617.056695] cfg80211:   (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74617.056700] cfg80211:   (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:29:57 Oban kernel: [74617.056705] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
May  5 09:29:57 Oban kernel: [74617.056711] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 4000 mBm)
May  5 09:29:57 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: associated -> 4-way handshake
May  5 09:29:57 Oban wpa_supplicant[1368]: wlan0: WPA: Key negotiation completed with 00:26:62:4f:c3:f6 [PTK=CCMP GTK=CCMP]
May  5 09:29:57 Oban wpa_supplicant[1368]: wlan0: CTRL-EVENT-CONNECTED - Connection to 00:26:62:4f:c3:f6 completed [id=0 id_str=]
May  5 09:29:57 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: 4-way handshake -> completed
May  5 09:31:34 Oban kernel: [74713.775114] wlan0: deauthenticated from 00:26:62:4f:c3:f6 (Reason: 6)
May  5 09:31:34 Oban wpa_supplicant[1368]: wlan0: CTRL-EVENT-DISCONNECTED bssid=00:26:62:4f:c3:f6 reason=6
May  5 09:31:34 Oban NetworkManager[1151]: <warn> Connection disconnected (reason 6)
May  5 09:31:34 Oban kernel: [74713.812782] cfg80211: Calling CRDA to update world regulatory domain
May  5 09:31:34 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: completed -> disconnected
May  5 09:31:34 Oban kernel: [74713.816717] cfg80211: World regulatory domain updated:
May  5 09:31:34 Oban kernel: [74713.816724] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
May  5 09:31:34 Oban kernel: [74713.816729] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:31:34 Oban kernel: [74713.816732] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:31:34 Oban kernel: [74713.816735] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
May  5 09:31:34 Oban kernel: [74713.816738] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:31:34 Oban kernel: [74713.816741] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
May  5 09:31:34 Oban NetworkManager[1151]: <info> (wlan0): supplicant interface state: disconnected -> scanning
May  5 09:31:49 Oban NetworkManager[1151]: <warn> (wlan0): link timed out.
May  5 09:31:49 Oban NetworkManager[1151]: <info> (wlan0): device state change: activated -> failed (reason 'SSID not found') [100 120 53]
May  5 09:31:49 Oban NetworkManager[1151]: <info> NetworkManager state is now DISCONNECTED
May  5 09:31:49 Oban NetworkManager[1151]: <warn> Activation (wlan0) failed for connection 'Air'
May  5 09:31:49 Oban dbus[943]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper)
May  5 09:31:49 Oban NetworkManager[1151]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0]
May  5 09:31:49 Oban NetworkManager[1151]: <info> (wlan0): deactivating device (reason 'none') [0]
May  5 09:11:56 Oban whoopsie[1374]: online
May  5 09:31:49 Oban whoopsie[1374]: offline
May  5 09:31:49 Oban kernel: [74729.721867] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
May  5 09:31:49 Oban NetworkManager[1151]: <info> (wlan0): canceled DHCP transaction, DHCP client pid 11587
May  5 09:31:49 Oban avahi-daemon[1099]: Withdrawing address record for fe80::8a53:2eff:fe07:49c8 on wlan0.
May  5 09:31:49 Oban avahi-daemon[1099]: Leaving mDNS multicast group on interface wlan0.IPv6 with address fe80::8a53:2eff:fe07:49c8.
May  5 09:31:49 Oban avahi-daemon[1099]: Interface wlan0.IPv6 no longer relevant for mDNS.
May  5 09:31:49 Oban NetworkManager[1151]: <warn> DNS: plugin dnsmasq update failed
May  5 09:31:49 Oban NetworkManager[1151]: <info> Removing DNS information from /sbin/resolvconf
May  5 09:31:49 Oban avahi-daemon[1099]: Withdrawing address record for 192.168.1.5 on wlan0.
May  5 09:31:49 Oban avahi-daemon[1099]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.1.5.
May  5 09:31:49 Oban avahi-daemon[1099]: Interface wlan0.IPv4 no longer relevant for mDNS.
May  5 09:31:49 Oban dnsmasq[1888]: setting upstream servers from DBus
May  5 09:31:50 Oban NetworkManager[1151]: <warn> Couldn't disconnect supplicant interface: This interface is not connected.
May  5 09:31:50 Oban dbus[943]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'

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这太令人沮丧了。我不能总是在 cat5 上。正如我之前所说，这在 13.10 上从未发生过。我真的不想降级。有没有办法可以使用 13.10 的 wifi 驱动程序？

此外，我将 wifi 安全性从 WPA2 更改为 128 WEP，到目前为止，我只在几个小时内断开了一次连接。在 WPA2 上，平均每 10 次。

Answer 1

Izk*_*ata 9

根据关于 launchpad 的评论，它是无害的：

WinEunuchs2Unix (ricklee518) 写于 2014-08-18：#24

糟糕，这种情况自 2009 年以来一直在发生，开发人员确实回应说，它只是为了在具有多个接入点要连接的企业环境中漫游。如果您家里只有一个 AP，请进入网络管理器，选择“编辑连接”，突出显示您的 AP/wlan0，然后单击“编辑”。然后单击空白的 BSSID 旁边的向下箭头。然后选择之前隐藏的mac地址。

我很抱歉将其与 802.11n 问题联系起来。曾经被咬过两次害羞我猜......

我已经完成了这些步骤，并且已经停止记录扫描和错误行。 ~~我还不能说它是否使我的连接更稳定，但我会尽量记住在一两天内更新这个答案。~~

3 周后我回来了（丢失了打开的标签，哎呀），我认为它有所帮助。我仍然会遇到奇怪的连接中断，但它们似乎不像我记得当我第一次发现这个问题时它们回来那么常见。

Answer 2

小智 2

@Jordan，我找到了一个解决方法，即停止网络管理器以避免每 2 秒扫描一次 AP，这就是我认为 wpa_supplicant 驱动程序代码中可能存在错误的地方。连接到 AP 后，我运行以下命令...

sudo Killall -STOP NetworkManager

虽然我在桌面上使用无线网络，但它是固定的，我真的不需要 NetworkManager 不断寻找 AP 并陷入这个问题。在驱动程序中解决此问题之前，我将继续执行上述解决方法。

Answer 3

bai*_*ain 0

这可能是 Linux 驱动程序或接入点固件中的错误，或两者兼而有之。关闭省电功能有帮助吗？iwconfig wlan0 关闭电源

要缩小问题范围，您可以尝试使用不同的接入点和 USB WiFi 适配器。不幸的是，这类问题很难诊断。

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