Problemas com wifi no Sony Vaio

[zerezende]

Bom dia a todos.

Meu notebook é um Sony Vaio VGN-NR230AE com SO Ubuntu 13.04.

O que acontece é o seguinte. Raramente meu notebook conecta-se a rede wireless que fiz aqui em casa. É uma casa pequena de apenas um pavimento, o nível de sinal é excelente em qualquer ponto e não sofro com quedas de conexão à rede ADSL. Para avaliar a situação, segui a seguinte recomendação que li neste forum:

sudo lshw -C newtork
iwconfig
ifconfig -a
nm-tool
rfkill list wifi

Abaixo temos duas situações. A primeira é quando não estou conectado e não aparece nenhuma rede na lista em que o network manager apresenta. A segunda situação é quando não estou conectado e aparece uma lista de redes wireless, inclusive a minha (MEJ2013).

/*--- Não conecta e lista de redes detectadas está vazia --*/

rezende@rezende:~$ sudo lshw -C network
[sudo] password for rezende:
  *-network             
       description: Ethernet interface
       product: 88E8039 PCI-E Fast Ethernet Controller
       vendor: Marvell Technology Group Ltd.
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eth0
       version: 15
       serial: 00:1a:80:d0:61:05
       capacity: 100Mbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:43 memory:f6000000-f6003fff ioport:2000(size=256)
  *-network
       description: Wireless interface
       product: AR242x / AR542x Wireless Network Adapter (PCI-Express)
       vendor: Atheros Communications Inc.
       physical id: 0
       bus info: pci@0000:06:00.0
       logical name: wlan0
       version: 01
       serial: 00:1d:d9:78:a0:29
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=ath5k driverversion=3.8.0-30-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bg
       resources: irq:18 memory:fa000000-fa00ffff

rezende@rezende:~$  iwconfig
wlan0     IEEE 802.11bg  ESSID:off/any
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm 
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
         
lo        no wireless extensions.

eth0      no wireless extensions.

rezende@rezende:~$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:1a:80:d0:61:05
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:16

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:240 errors:0 dropped:0 overruns:0 frame:0
          TX packets:240 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:19552 (19.5 KB)  TX bytes:19552 (19.5 KB)

wlan0     Link encap:Ethernet  HWaddr 00:1d:d9:78:a0:29
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

rezende@rezende:~$ nm-tool

NetworkManager Tool

State: disconnected

- Device: wlan0 ----------------------------------------------------------------
  Type:              802.11 WiFi
  Driver:            ath5k
  State:             disconnected
  Default:           no
  HW Address:        00:1D:D9:78:A0:29

  Capabilities:

  Wireless Properties
    WEP Encryption:  yes
    WPA Encryption:  yes
    WPA2 Encryption: yes

  Wireless Access Points


- Device: eth0 -----------------------------------------------------------------
  Type:              Wired
  Driver:            sky2
  State:             unavailable
  Default:           no
  HW Address:        00:1A:80:D0:61:05

  Capabilities:
    Carrier Detect:  yes

  Wired Properties
    Carrier:         off


rezende@rezende:~$ rfkill list wifi
0: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no

/* FIM */

/*-- Não conecta e a lista de redes detectadas está cheia (inclusive a minha rede MEJ2013) --*/

rezende@rezende:~/Documents/Vaio$ sudo lshw -C network
[sudo] password for rezende:
  *-network             
       description: Ethernet interface
       product: 88E8039 PCI-E Fast Ethernet Controller
       vendor: Marvell Technology Group Ltd.
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eth0
       version: 15
       serial: 00:1a:80:d0:61:05
       capacity: 100Mbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:43 memory:f6000000-f6003fff ioport:2000(size=256)
  *-network
       description: Wireless interface
       product: AR242x / AR542x Wireless Network Adapter (PCI-Express)
       vendor: Atheros Communications Inc.
       physical id: 0
       bus info: pci@0000:06:00.0
       logical name: wlan0
       version: 01
       serial: 00:1d:d9:78:a0:29
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=ath5k driverversion=3.8.0-30-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bg
       resources: irq:18 memory:fa000000-fa00ffff

rezende@rezende:~/Documents/Vaio$ iwconfig
wlan0     IEEE 802.11bg  ESSID:off/any
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm 
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
         
lo        no wireless extensions.

eth0      no wireless extensions.

rezende@rezende:~/Documents/Vaio$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:1a:80:d0:61:05
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:16

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:240 errors:0 dropped:0 overruns:0 frame:0
          TX packets:240 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:19288 (19.2 KB)  TX bytes:19288 (19.2 KB)

wlan0     Link encap:Ethernet  HWaddr 00:1d:d9:78:a0:29
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:2 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:306 (306.0 B)  TX bytes:2335 (2.3 KB)

rezende@rezende:~/Documents/Vaio$ nm-tool

NetworkManager Tool

State: disconnected

- Device: wlan0 ----------------------------------------------------------------
  Type:              802.11 WiFi
  Driver:            ath5k
  State:             disconnected
  Default:           no
  HW Address:        00:1D:D9:78:A0:29

  Capabilities:

  Wireless Properties
    WEP Encryption:  yes
    WPA Encryption:  yes
    WPA2 Encryption: yes

  Wireless Access Points
    REDE REMACLO:    Infra, 00:12:0E:B6:B3:08, Freq 2462 MHz, Rate 54 Mb/s, Strength 45 WPA
    Carlos:          Infra, 00:0E:2E:B4:24:47, Freq 2462 MHz, Rate 54 Mb/s, Strength 22 WPA WPA2
    Mayra:           Infra, 00:25:86:B3:F5:B0, Freq 2437 MHz, Rate 54 Mb/s, Strength 57 WPA WPA2
    dlink:           Infra, 00:21:91:74:3B:4C, Freq 2437 MHz, Rate 54 Mb/s, Strength 44 WEP
    linksys:         Infra, 00:1C:10:57:B3:DD, Freq 2437 MHz, Rate 54 Mb/s, Strength 27
    tubarao:         Infra, 78:44:76:2E:DE:80, Freq 2462 MHz, Rate 54 Mb/s, Strength 35
    Netfor3:         Infra, 00:02:6F:64:CF:D7, Freq 2447 MHz, Rate 11 Mb/s, Strength 34
    Maicon:          Infra, 00:0A:EB:26:71:0E, Freq 2462 MHz, Rate 54 Mb/s, Strength 12 WPA2
    BRAULIO:         Infra, F8:1A:67:8A:52:8E, Freq 2437 MHz, Rate 54 Mb/s, Strength 15 WPA WPA2
    Ilda:            Infra, A0:F3:C1:3B:07:8C, Freq 2412 MHz, Rate 54 Mb/s, Strength 24 WPA WPA2
    mgnet minas 14:  Infra, 00:0C:42:69:3F:2D, Freq 2422 MHz, Rate 11 Mb/s, Strength 12
    Alvorada_P3:     Infra, 00:02:6F:66:71:80, Freq 2422 MHz, Rate 11 Mb/s, Strength 10
    MEJ2013:         Infra, 54:E6:FC:B2:64:92, Freq 2462 MHz, Rate 54 Mb/s, Strength 52 WPA WPA2
    COOP:            Infra, 00:14:D1:52:C6:58, Freq 2447 MHz, Rate 54 Mb/s, Strength 45 WPA


- Device: eth0 -----------------------------------------------------------------
  Type:              Wired
  Driver:            sky2
  State:             unavailable
  Default:           no
  HW Address:        00:1A:80:D0:61:05

  Capabilities:
    Carrier Detect:  yes

  Wired Properties
    Carrier:         off

rezende@rezende:~/Documents/Vaio$ rfkill list wifi
0: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no

/* FIM */

Alguém poderia me ajudar? Muito obrigado.

[Tota]

Ola

Remova o modo gerenciado de suas configurações (managed)

Veja seu arquivo interfaces para saber se você não mudou algo ali.

Deixe sua placa ajustada para dhcp automático.

Possivelmente a mascara de rede esteja errada.

[]'s