Problemas com rede sem fio

[zekkerj]

Sem problema, é um erro menor que pode ser consertado depois.

Execute os comandos abaixo e cole o resultado aqui.

sudo modprobe -rv b43
sudo modprobe -v b43

dmesg |  tail

[quantumech]

Então... Aí vai:

sudo modprobe -rv b43

lucas@ubuntu:~$ sudo modprobe -rv b43
[sudo] password for lucas:
rmmod /lib/modules/2.6.32-36-generic/kernel/drivers/net/wireless/b43/b43.ko
rmmod /lib/modules/2.6.32-36-generic/kernel/drivers/ssb/ssb.ko
rmmod /lib/modules/2.6.32-36-generic/kernel/net/mac80211/mac80211.ko
rmmod /lib/modules/2.6.32-36-generic/kernel/net/wireless/cfg80211.ko
rmmod /lib/modules/2.6.32-36-generic/kernel/drivers/leds/led-class.ko
lucas@ubuntu:~$ ^C
lucas@ubuntu:~$

sudo modprobe -v b43

lucas@ubuntu:~$ sudo modprobe -v b43
insmod /lib/modules/2.6.32-36-generic/kernel/drivers/leds/led-class.ko
insmod /lib/modules/2.6.32-36-generic/kernel/net/wireless/cfg80211.ko
insmod /lib/modules/2.6.32-36-generic/kernel/net/mac80211/mac80211.ko
insmod /lib/modules/2.6.32-36-generic/kernel/drivers/ssb/ssb.ko
insmod /lib/modules/2.6.32-36-generic/kernel/drivers/net/wireless/b43/b43.ko

dmesg |  tail

lucas@ubuntu:~$ dmesg |  tail
[  217.728280] r8169: eth0: link up
[  260.191469] cfg80211: Calling CRDA to update world regulatory domain
[  260.196669] cfg80211: World regulatory domain updated:
[  260.196674]    (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[  260.196678]    (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  260.196683]    (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[  260.196686]    (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[  260.196690]    (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  260.196694]    (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  260.218636] Broadcom 43xx driver loaded [ Features: PL, Firmware-ID: FW13 ]
lucas@ubuntu:~$

Lucas

[zekkerj]

Certo. Aparentemente sua rede foi ativada; isso deve durar até sua máquina ser reiniciada. Antes de reiniciar a máquina, execute os comandos de teste:

sudo lshw -C network
iwconfig wlan0
ifconfig wlan0
nm-tool
rfkill list wifi

Teste também sua conexão. Depois reinicie sua máquina, e confirme se a rede continua funcionando.

[quantumech]

Veja abaixo:

sudo lshw -C network

lucas@ubuntu:~$ sudo lshw -C network
[sudo] password for lucas:
  *-network UNCLAIMED     
       description: Network controller
       product: Broadcom Corporation
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:12:00.0
       version: 01
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: latency=0
       resources: memory:fbc00000-fbc03fff
  *-network
       description: Ethernet interface
       product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:13:00.0
       logical name: eth0
       version: 02
       serial: b8:ac:6f:e7:90:10
       size: 100MB/s
       capacity: 100MB/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full ip=187.64.169.100 latency=0 link=yes multicast=yes port=MII speed=100MB/s
       resources: irq:28 ioport:e000(size=256) memory:d0b10000-d0b10fff(prefetchable) memory:d0b00000-d0b0ffff(prefetchable) memory:fb200000-fb21ffff(prefetchable)

iwconfig wlan0

lucas@ubuntu:~$ iwconfig wlan0
wlan0     No such device

ifconfig wlan0

lucas@ubuntu:~$ ifconfig wlan0
wlan0: erro obtendo informações da interface: %s: dispositivo não encontrado

nm-tool

lucas@ubuntu:~$ nm-tool

NetworkManager Tool

State: connected

- Device: eth0  [Auto eth0] ----------------------------------------------------
  Type:              Wired
  Driver:            r8169
  State:             connected
  Default:           yes
  HW Address:        B8:AC:6F:E7:90:10

  Capabilities:
    Carrier Detect:  yes
    Speed:           100 Mb/s

  Wired Properties
    Carrier:         on

  IPv4 Settings:
    Address:         187.64.169.100
    Prefix:          20 (255.255.240.0)
    Gateway:         187.64.160.1

    DNS:             187.36.192.15
    DNS:             187.36.192.16

rfkill list wifi

lucas@ubuntu:~$ rfkill list wifi
lucas@ubuntu:~$

Vou reiniciar...

[quantumech]

Ainda há problemas.

Não funcionou.

[zekkerj]

É, está bem estranho. O módulo estava carregado, e indicava ter reconhecido o hardware...

Diga uma coisa, sua máquina é Dell, certo? Um dos passos que eu te passei era pra bloquear um módulo que atrapalha a rede wireless no Ubuntu 10.04 nas máquinas Dell. Vamos verificar se isso funcionou.

lsmod | grep -i dell

modprobe -rv dell-laptop
modprobe -rv dell-wmi
modprobe -rv acer-wmi
modprobe -rv b43
modprobe -v b43
dmesg | tail -20
sudo lshw -C network

Tudo bem se alguns dos comandos derem erro, pode ser que os módulos que a gente mandou descarregar não existam ou não estejam carregados.

[quantumech]

Acompanhe:

lucas@ubuntu:~$ lsmod | grep -i dell
dell_wmi                2177  0
lucas@ubuntu:~$ modprobe -rv dell-laptop
rmmod /lib/modules/2.6.32-36-generic/kernel/drivers/firmware/dcdbas.ko
WARNING: Error removing dcdbas (/lib/modules/2.6.32-36-generic/kernel/drivers/firmware/dcdbas.ko): Operation not permitted
lucas@ubuntu:~$ modprobe -rv dell-wmi
rmmod /lib/modules/2.6.32-36-generic/kernel/drivers/platform/x86/dell-wmi.ko
FATAL: Error removing dell_wmi (/lib/modules/2.6.32-36-generic/kernel/drivers/platform/x86/dell-wmi.ko): Operation not permitted
lucas@ubuntu:~$ modprobe -rv acer-wmi
lucas@ubuntu:~$ modprobe -rv b43
rmmod /lib/modules/2.6.32-36-generic/kernel/drivers/net/wireless/b43/b43.ko
FATAL: Error removing b43 (/lib/modules/2.6.32-36-generic/kernel/drivers/net/wireless/b43/b43.ko): Operation not permitted
lucas@ubuntu:~$ modprobe -v b43
lucas@ubuntu:~$ dmesg | tail -20
[   23.505589]  domain 0: span 0,2 level SIBLING
[   23.505593]   groups: 0 (cpu_power = 589) 2 (cpu_power = 589)
[   23.505605]   domain 1: span 0-3 level MC
[   23.505606]    groups: 0,2 (cpu_power = 1178) 1,3 (cpu_power = 1178)
[   23.505612] CPU1 attaching sched-domain:
[   23.505613]  domain 0: span 1,3 level SIBLING
[   23.505615]   groups: 1 (cpu_power = 589) 3 (cpu_power = 589)
[   23.505618]   domain 1: span 0-3 level MC
[   23.505619]    groups: 1,3 (cpu_power = 1178) 0,2 (cpu_power = 1178)
[   23.505623] CPU2 attaching sched-domain:
[   23.505624]  domain 0: span 0,2 level SIBLING
[   23.505625]   groups: 2 (cpu_power = 589) 0 (cpu_power = 589)
[   23.505628]   domain 1: span 0-3 level MC
[   23.505630]    groups: 0,2 (cpu_power = 1178) 1,3 (cpu_power = 1178)
[   23.505633] CPU3 attaching sched-domain:
[   23.505634]  domain 0: span 1,3 level SIBLING
[   23.505636]   groups: 3 (cpu_power = 589) 1 (cpu_power = 589)
[   23.505639]   domain 1: span 0-3 level MC
[   23.505640]    groups: 1,3 (cpu_power = 1178) 0,2 (cpu_power = 1178)
[   31.393704] eth0: no IPv6 routers present
lucas@ubuntu:~$ sudo lshw -C network
[sudo] password for lucas:
  *-network UNCLAIMED     
       description: Network controller
       product: Broadcom Corporation
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:12:00.0
       version: 01
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: latency=0
       resources: memory:fbc00000-fbc03fff
  *-network
       description: Ethernet interface
       product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:13:00.0
       logical name: eth0
       version: 02
       serial: b8:ac:6f:e7:90:10
       size: 100MB/s
       capacity: 100MB/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full ip=187.64.169.100 latency=0 link=yes multicast=yes port=MII speed=100MB/s
       resources: irq:28 ioport:e000(size=256) memory:d0b10000-d0b10fff(prefetchable) memory:d0b00000-d0b0ffff(prefetchable) memory:fb200000-fb21ffff(prefetchable)
lucas@ubuntu:~$

Vou reiniciar.

[quantumech]

Nada!

No ícone do painel relacionado a rede nem aparece nenhuma opção de rede sem fio. 

No Windowns a internet wireless  funciona normalmente.

[zekkerj]

Desculpe, na mensagem anterior esqueci de dizer que todos os comandos "modprobe" devem ser executados com "sudo", assim:

lsmod | grep -i dell

sudo modprobe -rv dell-laptop
sudo modprobe -rv dell-wmi
sudo modprobe -rv acer-wmi
sudo modprobe -rv b43
sudo modprobe -v b43

dmesg | tail -20

sudo lshw -C network

[quantumech]

Novamente:

lucas@ubuntu:~$ lsmod | grep -i dell
dell_wmi                2177  0
lucas@ubuntu:~$
lucas@ubuntu:~$ sudo modprobe -rv dell-laptop
[sudo] password for lucas:
rmmod /lib/modules/2.6.32-36-generic/kernel/drivers/firmware/dcdbas.ko
lucas@ubuntu:~$ sudo modprobe -rv dell-wmi
rmmod /lib/modules/2.6.32-36-generic/kernel/drivers/platform/x86/dell-wmi.ko
lucas@ubuntu:~$ sudo modprobe -rv acer-wmi
lucas@ubuntu:~$ sudo modprobe -rv b43
rmmod /lib/modules/2.6.32-36-generic/kernel/drivers/net/wireless/b43/b43.ko
rmmod /lib/modules/2.6.32-36-generic/kernel/drivers/ssb/ssb.ko
rmmod /lib/modules/2.6.32-36-generic/kernel/net/mac80211/mac80211.ko
rmmod /lib/modules/2.6.32-36-generic/kernel/net/wireless/cfg80211.ko
rmmod /lib/modules/2.6.32-36-generic/kernel/drivers/leds/led-class.ko
lucas@ubuntu:~$ sudo modprobe -v b43
insmod /lib/modules/2.6.32-36-generic/kernel/drivers/leds/led-class.ko
insmod /lib/modules/2.6.32-36-generic/kernel/net/wireless/cfg80211.ko
insmod /lib/modules/2.6.32-36-generic/kernel/net/mac80211/mac80211.ko
insmod /lib/modules/2.6.32-36-generic/kernel/drivers/ssb/ssb.ko
insmod /lib/modules/2.6.32-36-generic/kernel/drivers/net/wireless/b43/b43.ko
lucas@ubuntu:~$ dmesg | tail -20
[   23.811754]    groups: 1,3 (cpu_power = 1178) 0,2 (cpu_power = 1178)
[   23.811758] CPU2 attaching sched-domain:
[   23.811759]  domain 0: span 0,2 level SIBLING
[   23.811760]   groups: 2 (cpu_power = 589) 0 (cpu_power = 589)
[   23.811763]   domain 1: span 0-3 level MC
[   23.811764]    groups: 0,2 (cpu_power = 1178) 1,3 (cpu_power = 1178)
[   23.811768] CPU3 attaching sched-domain:
[   23.811769]  domain 0: span 1,3 level SIBLING
[   23.811770]   groups: 3 (cpu_power = 589) 1 (cpu_power = 589)
[   23.811773]   domain 1: span 0-3 level MC
[   23.811775]    groups: 1,3 (cpu_power = 1178) 0,2 (cpu_power = 1178)
[  120.954082] cfg80211: Calling CRDA to update world regulatory domain
[  120.960870] cfg80211: World regulatory domain updated:
[  120.960876]    (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[  120.960884]    (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  120.960891]    (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[  120.960898]    (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[  120.960905]    (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  120.960911]    (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[  120.982677] Broadcom 43xx driver loaded [ Features: PL, Firmware-ID: FW13 ]
lucas@ubuntu:~$
lucas@ubuntu:~$ sudo lshw -C network
  *-network UNCLAIMED     
       description: Network controller
       product: Broadcom Corporation
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:12:00.0
       version: 01
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: latency=0
       resources: memory:fbc00000-fbc03fff
  *-network
       description: Ethernet interface
       product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:13:00.0
       logical name: eth0
       version: 02
       serial: b8:ac:6f:e7:90:10
       size: 10MB/s
       capacity: 100MB/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half latency=0 link=no multicast=yes port=MII speed=10MB/s
       resources: irq:29 ioport:e000(size=256) memory:d0b10000-d0b10fff(prefetchable) memory:d0b00000-d0b0ffff(prefetchable) memory:fb200000-fb21ffff(prefetchable)
lucas@ubuntu:~$

Reiniciei o computador, mas não resolveu o problema.

[zekkerj]

Tá faltando algum detalhezinho... execute o comando abaixo e cole o resultado aqui.

sudo lspci -v -s 12:00.0

[quantumech]

Confira:

sudo lspci -v -s 12:00.0

lucas@ubuntu:~$ sudo lspci -v -s 12:00.0
[sudo] password for lucas:
12:00.0 Network controller: Broadcom Corporation Device 4727 (rev 01)
   Subsystem: Dell Device 0010
   Flags: bus master, fast devsel, latency 0, IRQ 5
   Memory at fbc00000 (64-bit, non-prefetchable) [size=16K]
   Capabilities: [40] Power Management version 3
   Capabilities: [58] Vendor Specific Information <?>
   Capabilities: [48] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
   Capabilities: [d0] Express Endpoint, MSI 00
   Capabilities: [100] Advanced Error Reporting <?>
   Capabilities: [13c] Virtual Channel <?>
   Capabilities: [160] Device Serial Number 65-1c-82-ff-ff-9d-00-00
   Capabilities: [16c] Power Budgeting <?>

[zekkerj]

Bem, eu consegui achar alguns resultados no google.

Parece que é um problema específico do Kernel do Ubuntu 10.04 (2.6.32) com esse controlador Broadcomm 4727. Parece que o driver que funciona com essa placa é o "wl", mesmo, que é instalado pelo pacote "bcmwl-kernel-source" [Referência].

Mas o histórico de problemas da sala sugere que isso seria resolvido de forma mais simples usando uma versão mais nova do Ubuntu --- por exemplo a 11.10, que é a versão atual. Inclusive, estamos já em cima da pinta pro lançamento do Ubuntu 12.04, no final do mês que vem.

[quantumech]

Por ora obrigado!

Vou tentando aqui! Vou ver no que dá!

[quantumech]

Resolvido!

Realmente é só instalar o bcmwl-kernel-source executando os seguintes comandos:

sudo apt-get update
sudo apt-get install bcmwl-kernel-source

E... reiniciar o computador.

Obrigado