Problemas de rede desde o Trusty

Question

Desde a atualização (nova instalação) para o Trusty (Kubuntu - EDIT e agora o Ubuntu vanilla, eu mudei novamente para solucionar este problema ) eu notei problemas de rede.

Exatamente a cada dois minutos, minha rede adivinha por um momento, mas logo volta a ficar on-line. Isso é claramente refletido no syslog:

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

Ainda não resolvi muito tempo, acabei de instalar há um dia. Eu queria saber se alguém já viu esse problema antes? Eu não me lembro de ver isso de volta quando eu estava no Ubuntu 13.10 com exatamente o mesmo hardware há apenas 3 dias.

Equipamento: Tecra R840-S8430 Controlador de rede: Intel Corporation Centrino Advanced-N 6230 [Rainbow Peak] (rev 34) Sabor: Kubuntu + Ubuntu Lançamento: 14.04 LTS

Atualização - Mais informações (5/05/05)

Sim, isso parece estar perdendo minha conexão. Aqui está algum syslog de um drop típico, eu tenho que desabilitar / re habilitar wi-fi para recuperá-lo:

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'

Isso é tão frustrante. Eu não posso estar sempre na cat5. Como eu disse antes, isso nunca aconteceu em 13.10. Eu realmente não quero fazer downgrade. Existe uma maneira que eu possa usar os drivers de wifi de 13.10?

Além disso, alterei minha segurança de Wi-Fi de WPA2 para 128 WEP e, até agora, apenas desconectei uma vez em algumas horas. No WPA2, era a cada 10 em média.

    

Answer 1

De acordo com comentários no launchpad , é inofensivo:

  

WinEunuchs2Unix (ricklee518) escreveu em 2014-08-18: # 24

     

    

Oops, isso vem acontecendo desde 2009 e um desenvolvedor respondeu que é simplesmente para roaming em ambientes corporativos com vários pontos de acesso para se conectar. Se você tiver apenas um AP em casa, entre no gerenciador de rede, selecione "Editar Conexão", destaque seu AP / wlan0 e clique em "Editar". Em seguida, clique na seta para baixo ao lado de BSSID, que está em branco. Em seguida, selecione o endereço mac que estava oculto antes.

         

Minhas desculpas por vincular isso a um problema 802.11n. Uma vez mordido duas vezes tímido, eu acho ....

  

Eu fiz essas etapas e as linhas de varredura e erro deixaram de ser registradas. Ainda não posso dizer se minha conexão está mais estável, mas tentarei lembrar de atualizar essa resposta em um dia ou dois.

Estou de volta 3 semanas depois (perdi a guia aberta, oops) e acho que ajudou. Eu ainda recebo as conexões estranhas, mas elas não parecem tão comuns quanto eu me lembro de estarem de volta quando eu encontrei esta pergunta pela primeira vez.

    

Answer 2

Eu provavelmente tenho o mesmo problema, veja " Desautenticação freqüente de Wifi (Razão: 6) em um Centrino Advanced-N 6230 [Rainbow Peak] ".

Acho que encontrei uma solução desativando o modo-N wifi. Isso pode ser feito temporariamente (após remover o módulo) com "modprobe iwlwifi 11n_disable = 1" ou permanentemente adicionando "options iwlwifi 11n_disable = 1" a algum arquivo em /etc/modprobe.d.

Talvez devêssemos abrir um bug no bugzilla.kernel.org?

    

Answer 3

@Jordan, eu encontrei uma solução alternativa, ou seja, parar o gerenciador de rede para evitar a varredura de AP a cada 2 segundos, que é onde eu acho que há possivelmente um bug no código do driver wpa_supplicant. Depois de me conectar ao meu AP, eu corro o seguinte ...

sudo killall -STOP NetworkManager

Embora eu use a rede sem fio na minha área de trabalho, ela é estacionária e eu realmente não preciso do NetworkManager constantemente procurando APs e resolvendo esse problema. Até que esse problema seja corrigido no driver, continuarei com o trabalho acima.

    

Answer 4

Pode ser um bug no driver do Linux, no firmware do ponto de acesso ou em ambos. Desativar a ajuda para economizar energia? desligamento do wlan0 do iwconfig

Para diminuir o problema, você pode tentar usar um ponto de acesso diferente e um adaptador Wi-Fi USB. Infelizmente, esses tipos de problemas são difíceis de diagnosticar.