How To Fix Wireless Problem On My OS / Ubuntu 12.04

Problem :

• Go to menu Application -> Accessories -> Terminal.
• If the terminal window is already visible, then go to the right of access as root. Inside terminal, execute the following command :

  dnd@riyaniezt:~$ sudo -i
  [sudo] password for dnd:

Cek Your Wireless Problem :

1. Inside Terminal, execute the following command:

   root@riyaniezt:~# ifconfig wlan0 up
   SIOCSIFFLAGS: Operation not possible due to RF-kill

2. Inside Terminal, execute the following command:

   root@riyaniezt:~# cat /var/lib/NetworkManager/NetworkManager.state 
   
   [main]
   NetworkingEnabled=true
   WirelessEnabled=false
   WWANEnabled=true
   WimaxEnabled=true

    

3. Inside Terminal, execute the following command:

   root@riyaniezt:~# lshw -C network
     *-network               
          description: Ethernet interface
          product: AR8131 Gigabit Ethernet
          vendor: Atheros Communications Inc.
          physical id: 0
          bus info: pci@0000:01:00.0
          logical name: eth0
          version: c0
          serial: 54:53:ed:58:29:8e
          capacity: 1Gbit/s
          width: 64 bits
          clock: 33MHz
          capabilities: pm msi pciexpress vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
          configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.0-NAPI firmware=N/A latency=0 link=no multicast=yes port=twisted pair
          resources: irq:44 memory:f0100000-f013ffff ioport:2000(size=128)
     *-network DISABLED
          description: Wireless interface product: AR9285 Wireless Network Adapter (PCI-Express) 
          vendor: Atheros Communications Inc. physical 
          id: 0 bus 
          info: pci@0000:02:00.0 logical 
          name: wlan0 version: 01 
          serial: 08:ed:b9:aa:e5:71 
          width: 64 bits 
          clock: 33MHz 
          capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless 
          configuration: broadcast=yes driver=ath9k driverversion=3.2.0-32-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn 
          resources: irq:18 memory:f0000000-f000ffff

Solution :

1. Inside Terminal, execute the following command:

   root@riyaniezt:~# rfkill unblock all

2. Inside Terminal, execute the following command:

   root@riyaniezt:~# cat /var/lib/NetworkManager/NetworkManager.state 
   
   [main]
   NetworkingEnabled=true
   WirelessEnabled=false
   WWANEnabled=true
   WimaxEnabled=true

3. Inside Terminal, execute the following command:

   root@riyaniezt:~# /etc/init.d/network-manager restart
   Rather than invoking init scripts through /etc/init.d, use the service(8)
   utility, e.g. service network-manager restart
   
   Since the script you are attempting to invoke has been converted to an
   Upstart job, you may also use the stop(8) and then start(8) utilities,
   e.g. stop network-manager ; start network-manager. The restart(8) utility is also available.
   network-manager stop/waiting
   network-manager start/running, process 7444

   
   

4. Inside Terminal, execute the following command:

   root@riyaniezt:~# lshw -C network
     *-network               
          description: Ethernet interface
          product: AR8131 Gigabit Ethernet
          vendor: Atheros Communications Inc.
          physical id: 0
          bus info: pci@0000:01:00.0
          logical name: eth0
          version: c0
          serial: 54:53:ed:58:29:8e
          capacity: 1Gbit/s
          width: 64 bits
          clock: 33MHz
          capabilities: pm msi pciexpress vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
          configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.0-NAPI firmware=N/A latency=0 link=no multicast=yes port=twisted pair
          resources: irq:44 memory:f0100000-f013ffff ioport:2000(size=128)
     *-network
                description: Wireless interface
          product: AR9285 Wireless Network Adapter (PCI-Express)
          vendor: Atheros Communications Inc.
          physical id: 0
          bus info: pci@0000:02:00.0
          logical name: wlan0
          version: 01
          serial: 08:ed:b9:aa:e5:71
          width: 64 bits
          clock: 33MHz
          capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
          configuration: broadcast=yes driver=ath9k driverversion=3.2.0-32-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
          resources: irq:18 memory:f0000000-f000ffff

5. Inside Terminal, execute the following command:

   root@riyaniezt:~# cat /var/lib/NetworkManager/NetworkManager.state 
   
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true