14.04 wifi não consegue conectar “warn Connection connection disconnected (reason -3)”

Question

Nova instalação do 14.04 e não consigo me conectar a uma rede wifi funcional ("Bricks and Scones" é o nome do ponto de acesso no log abaixo). Outros dispositivos (por exemplo, o android que estou usando para postar isso) se conectam muito bem. Não tenho certeza do que há de errado com minha configuração. Eu estou olhando para o syslog, mas ainda não consigo resolver o que está errado. O que esses avisos significam?

ryan@palms /v/log> tail -f syslog | grep -C5 'warn\|error'
May 11 18:55:18 palms avahi-daemon[730]: Withdrawing address record for 192.168.1.129 on wlan0.
May 11 18:55:18 palms avahi-daemon[730]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.1.129.
May 11 18:55:18 palms avahi-daemon[730]: Interface wlan0.IPv4 no longer relevant for mDNS.
May 11 18:55:09 palms whoopsie[1292]: online
May 11 18:55:18 palms whoopsie[1292]: offline
May 11 18:55:18 palms NetworkManager[985]: <warn> DNS: plugin dnsmasq update failed
May 11 18:55:18 palms wpa_supplicant[1004]: nl80211: Was expecting local disconnect but got another disconnect event first
May 11 18:55:18 palms dnsmasq[2269]: setting upstream servers from DBus
May 11 18:55:18 palms NetworkManager[985]: <info> Removing DNS information from /sbin/resolvconf
May 11 18:55:18 palms kernel: [  806.867681] cfg80211: Calling CRDA to update world regulatory domain
May 11 18:55:18 palms kernel: [  806.873484] cfg80211: World regulatory domain updated:
--
May 11 18:55:18 palms NetworkManager[985]: <info> Activation (wlan0) starting connection 'Bricks and Scones Guest Network'
May 11 18:55:18 palms NetworkManager[985]: <info> (wlan0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
May 11 18:55:18 palms NetworkManager[985]: <info> NetworkManager state is now CONNECTING
May 11 18:55:18 palms NetworkManager[985]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
May 11 18:55:18 palms wpa_supplicant[1004]: wlan0: CTRL-EVENT-SCAN-STARTED 
May 11 18:55:18 palms NetworkManager[985]: <warn> Connection disconnected (reason -3)
May 11 18:55:18 palms NetworkManager[985]: <info> (wlan0): supplicant interface state: completed -> disconnected
May 11 18:55:18 palms NetworkManager[985]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
May 11 18:55:18 palms NetworkManager[985]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
May 11 18:55:18 palms NetworkManager[985]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
May 11 18:55:18 palms NetworkManager[985]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
--
May 11 18:55:39 palms NetworkManager[985]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) started...
May 11 18:55:39 palms NetworkManager[985]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) complete.
May 11 18:55:40 palms dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 10 (xid=0x7609df84)
May 11 18:55:50 palms dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 13 (xid=0x7609df84)
May 11 18:56:03 palms dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 9 (xid=0x7609df84)
May 11 18:56:04 palms NetworkManager[985]: <warn> (wlan0): DHCPv4 request timed out.
May 11 18:56:04 palms NetworkManager[985]: <info> (wlan0): canceled DHCP transaction, DHCP client pid 4231
May 11 18:56:04 palms NetworkManager[985]: <info> Activation (wlan0) Stage 4 of 5 (IPv4 Configure Timeout) scheduled...
May 11 18:56:04 palms NetworkManager[985]: <info> Activation (wlan0) Stage 4 of 5 (IPv4 Configure Timeout) started...
May 11 18:56:04 palms NetworkManager[985]: <info> (wlan0): device state change: ip-config -> failed (reason 'ip-config-unavailable') [70 120 5]
May 11 18:56:04 palms NetworkManager[985]: <info> NetworkManager state is now DISCONNECTED
May 11 18:56:04 palms NetworkManager[985]: <info> Marking connection 'Bricks and Scones Guest Network' invalid.
May 11 18:56:04 palms NetworkManager[985]: <warn> Activation (wlan0) failed for connection 'Bricks and Scones Guest Network'
May 11 18:56:04 palms NetworkManager[985]: <info> Activation (wlan0) Stage 4 of 5 (IPv4 Configure Timeout) complete.
May 11 18:56:04 palms NetworkManager[985]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0]
May 11 18:56:04 palms NetworkManager[985]: <info> (wlan0): deactivating device (reason 'none') [0]
May 11 18:56:04 palms avahi-daemon[730]: Withdrawing address record for fe80::3623:87ff:fefd:5b57 on wlan0.
May 11 18:56:04 palms avahi-daemon[730]: Leaving mDNS multicast group on interface wlan0.IPv6 with address fe80::3623:87ff:fefd:5b57.
May 11 18:56:04 palms avahi-daemon[730]: Interface wlan0.IPv6 no longer relevant for mDNS.
May 11 18:56:04 palms wpa_supplicant[1004]: wlan0: CTRL-EVENT-DISCONNECTED bssid=7e:d1:c3:ce:2c:9a reason=3 locally_generated=1
May 11 18:56:04 palms NetworkManager[985]: <warn> Connection disconnected (reason -3)
May 11 18:56:04 palms wpa_supplicant[1004]: wlan0: CTRL-EVENT-SCAN-STARTED 
May 11 18:56:04 palms wpa_supplicant[1004]: nl80211: Was expecting local disconnect but got another disconnect event first
May 11 18:56:04 palms NetworkManager[985]: <info> (wlan0): supplicant interface state: completed -> disconnected
May 11 18:56:04 palms kernel: [  852.988624] cfg80211: Calling CRDA to update world regulatory domain
May 11 18:56:04 palms kernel: [  852.991920] cfg80211: World regulatory domain updated:

(mais um aqui: link )

    

Answer 1

Pouco, mas seu log tem mensagens em comum com um postado no blog zeroset . Seu (e meu) problema era que alguns adaptadores e pontos de acesso interagem mal no modo N. A solução é desativar o modo N e, assim, mudar para um modo mais lento.

Do seu log, não parece que você tenha um adaptador Intel, mas, se fizer isso, você pode tentar a solução da zeroset:

  

Solução temporária

     

Para uma solução temporária, por ex. para verificar se a solução proposta ajuda   para a sua configuração, recarregue o módulo do kernel iwlwifi com a opção    11n_disable definido como 1, para desativar o 802.11N, por ex. por

sudo sh -c 'modprobe -r iwlwifi && modprobe iwlwifi 11n_disable=1'

     

Você   será perguntado por sua senha sudo como você precisa de privilégios de raiz para   recarregar um módulo do kernel.

     

Solução permanente

     

Para desabilitar permanentemente o 802.11N no driver, adicione a linha

options iwlwifi 11n_disable=1

     

para /etc/modprobe.d/iwlwifi.conf

"Temporário" aqui significa que ele será revertido assim que você reiniciar.

    

Answer 2

Eu estava tendo um problema semelhante, mas não dispositivo poderia se conectar, mesmo com ethernet. Estou colocando minha solução aqui, porque esse é o resultado do google superior da mensagem de erro.

Eu consertei isso desligando o roteador e ligando-o novamente .

Portanto, para qualquer smartass como eu, que começar a analisar os seus registos para diagnosticar o problema, e ver Connection disconnected (reason -3) e ainda não tentaram reiniciar o router ... faça isso antes de googling em.