Não é possível conectar-se à rede WiFi após as atualizações

Question

Eu estou rodando 12.04, e não tive problemas com WiFi até que eu instalei atualizações na noite passada (havia algumas, e não sei como ver o que foi instalado). Pode não estar relacionado, mas é a única coisa que mudou.

Já não consigo ligar à minha rede Wi-Fi doméstica. Algumas redes (como o meu hotspot Android) funcionam bem, mas a conexão ao nosso BT Home Hub apenas expira e solicita autenticação também.

O laptop é um HP EliteBook 8470p, que tem uma placa 'Centrino Advanced-N 6205' (informada em lshw, não tenho certeza se é uma marca para outra placa).

Aqui está o que está no meu syslog, o erro parece ser 'Falha ao inserir a entrada Dummy STA para o AP':

Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: get_secret_flags: assertion 'is_secret_prop (setting, secret_name, error)' failed
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> (wlan0): device state change: need-auth -> prepare (reason 'none') [60 40 0]
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Activation (wlan0/wireless): connection 'BTHub3-8ZRT 1' has security, and secrets exist.  No new secrets needed.
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Config: added 'ssid' value 'BTHub3-8ZRT'
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Config: added 'scan_ssid' value '1'
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Config: added 'key_mgmt' value 'NONE'
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Config: added 'wep_key0' value '<omitted>'
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Config: added 'wep_tx_keyidx' value '0'
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> Config: set interface ap_scan to 1
Sep 17 16:56:43 richard-HP-EliteBook-8470p NetworkManager[998]: <info> (wlan0): supplicant interface state: disconnected -> scanning
Sep 17 16:56:47 richard-HP-EliteBook-8470p wpa_supplicant[1506]: Trying to authenticate with 00:fe:f4:75:56:50 (SSID='BTHub3-8ZRT' freq=2412 MHz)
Sep 17 16:56:47 richard-HP-EliteBook-8470p wpa_supplicant[1506]: CTRL-EVENT-DISCONNECTED bssid=00:fe:f4:75:56:50 reason=2
Sep 17 16:56:47 richard-HP-EliteBook-8470p kernel: [  291.593766] wlan0: deauthenticating from 00:fe:f4:75:56:50 by local choice (reason=2)
Sep 17 16:56:47 richard-HP-EliteBook-8470p NetworkManager[998]: <info> (wlan0): supplicant interface state: scanning -> authenticating
Sep 17 16:56:47 richard-HP-EliteBook-8470p wpa_supplicant[1506]: Trying to associate with 00:fe:f4:75:56:50 (SSID='BTHub3-8ZRT' freq=2412 MHz)
Sep 17 16:56:47 richard-HP-EliteBook-8470p wpa_supplicant[1506]: Association request to the driver failed
Sep 17 16:56:47 richard-HP-EliteBook-8470p kernel: [  291.595197] wlan0: authenticate with 00:fe:f4:75:56:50 (try 1)
Sep 17 16:56:47 richard-HP-EliteBook-8470p kernel: [  291.597584] wlan0: authenticated
Sep 17 16:56:47 richard-HP-EliteBook-8470p kernel: [  291.597763] wlan0: failed to insert Dummy STA entry for the AP (error -17)
Sep 17 16:56:47 richard-HP-EliteBook-8470p NetworkManager[998]: <info> (wlan0): supplicant interface state: authenticating -> associating

Alguém tem alguma idéia de qual é o problema e como corrigi-lo?

Muito obrigado por qualquer ajuda!

    

Answer 1

tente isso

link

Ubuntu 12.04. WiFi não funciona

Verifique se a placa wifi está bloqueada (Terminal)

rfkill list wlan     (for wifi)

OR

rfkill list all             (for wifi and bluetooth)

DESBLOQUEAR :

rfkill unblock wlan     (for wifi)

OR

rfkill unblock all             (for wifi and bluetooth)

Reinicie a rede:

sudo service network-manager restart

    

Answer 2

Na verdade, eu segui 2 passos para ativar o wireless no meu PC

Etapa 1: Removido o pacote bcmwl-kernel-source

sudo apt-get remove bcmwl-kernel-source

Passo 2: Instalou o pacote firmware-b43-installer.

sudo apt-get install firmware-b43-installer

Em seguida, reiniciei o meu PC.

Finalmente tenho o meu trabalho feito. :)