BIOS issue -> 1: phy0: Wireless LAN Hard blocked: yes -> DISABLED Wireless Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01) not working on LENOVO Lenovo 3000 G430 in Ubuntu 12.04.1 LTS

Asked by Anil Gobburi on 2013-01-15

I installed Ubuntu 12.04 LTS x86_64 on my laptop Lenovo 3000 G430.
Wifi is not working from start.
I tried all the solutions in the internet but could not resolve the issue.
I need help from our community as to how this issue can be resolved.

I am ready to provide additional information immediately if needed.
Thank you!

Question information

Language:
English Edit question
Status:
Solved
For:
Ubuntu broadcom-sta Edit question
Assignee:
No assignee Edit question
Solved by:
Mark Rijckenberg
Solved:
2013-01-17
Last query:
2013-01-17
Last reply:
2013-01-15

Hi,

Please first connect your wired network adapter to the wireless router using an ethernet cable (also known as a LAN cable).

In order to gather essential troubleshooting information about your wireless card, please follow this procedure:

Step 1:

If you are using the Gnome interface, open the Terminal console via "Applications->Accessories->Terminal"

If you are using the Unity interface, the easiest way to open the Terminal is to use the 'search' function on the dash. Or you can click on the 'More Apps' button, click on the 'See more results' by the installed section, and find it in that list of applications. A third way, available after you click on the 'More Apps' button, is to go to the search bar, and see that the far right end of it says 'All Applications'. You then click on that, and you'll see the full list. Then you can go to Accessories > Terminal after that.

The methods in Unity are:
Press Control-ALT-T key combination.
Dash > Search for Terminal
Dash > More Apps > 'See More Results' > Terminal
Dash > More Apps > Accessories > Terminal

Step 2: Please copy-paste the following command from https://help.ubuntu.com/community/WirelessTroubleshootingProcedure in Firefox into the Linux Terminal. Do NOT copy-paste from the Email message into the Terminal, as that will only copy PART of the command. The command STARTS with the word sudo and ENDS with the word lsmod. So please copy-paste the ENTIRE command below from Firefox into a Terminal, press <enter>, then enter password when sudo asks for password, then press enter again.

Tip: If you have a wheel mouse or 3 button mouse you do not need to type commands into the Terminal. Highlight the command written on the page. Move your cursor anywhere in the Terminal and press the wheel or middle button. Automatic Copy and paste! No spelling mistakes! No Typos! No other errors!

sudo apt-get update; sudo apt-get install hwinfo grep rfkill; sudo lshw -C network; rfkill list; sudo iwlist scan | egrep -i 'chan|ssid'; cat /etc/network/interfaces; cat /etc/lsb-release; lspci -nn; lsusb; sudo lshw -short; uname -a; dmesg | egrep 'acx|at76|ath|b43|bcm|brcm|CX|eth|ipw|ireless|irmware|isl|lbtf|orinoco|ndiswrapper|NPE|ound|p54|prism|rtl|rt2|rt3|rt5|rt6|rt7|usb|witch|wl';sudo dmidecode|egrep 'anufact|roduct|erial|elease'; iwconfig; cat /etc/modprobe.d/* | egrep 'acx|at76|ath|b43|bcm|brcm|CX|eth|ipw|irmware|isl|lbtf|orinoco|ndiswrapper|NPE|p54|prism|rtl|rt2|rt3|rt6|rt7|wmi|witch|wl'; cat /var/lib/NetworkManager/NetworkManager.state; sudo hwinfo --netcard ; ps -aux|egrep 'wpa|icd|etwork'; netstat -rn ; cat /etc/resolv.conf; sudo lsmod

Step 3: Please post results (copy/paste terminal output) on this thread. The troubleshooters here need to see the full Terminal output from running the above command.

Regards,

Mark

Anil Gobburi (anil-gobburi) said : #2

[sudo] password for anil:
Ign http://security.ubuntu.com precise-security InRelease
Ign http://in.archive.ubuntu.com precise InRelease
Ign http://in.archive.ubuntu.com precise-updates InRelease
Ign http://in.archive.ubuntu.com precise-backports InRelease
Ign http://extras.ubuntu.com precise InRelease
Get:1 http://security.ubuntu.com precise-security Release.gpg [198 B]
Hit http://in.archive.ubuntu.com precise Release.gpg
Get:2 http://extras.ubuntu.com precise Release.gpg [72 B]
Get:3 http://security.ubuntu.com precise-security Release [49.6 kB]
Get:4 http://in.archive.ubuntu.com precise-updates Release.gpg [198 B]
Hit http://in.archive.ubuntu.com precise-backports Release.gpg
Hit http://extras.ubuntu.com precise Release
Hit http://in.archive.ubuntu.com precise Release
Hit http://extras.ubuntu.com precise/main Sources
Get:5 http://in.archive.ubuntu.com precise-updates Release [49.6 kB]
Get:6 http://security.ubuntu.com precise-security/main Sources [60.4 kB]
Hit http://extras.ubuntu.com precise/main amd64 Packages
Hit http://extras.ubuntu.com precise/main i386 Packages
Hit http://in.archive.ubuntu.com precise-backports Release
Ign http://extras.ubuntu.com precise/main TranslationIndex
Get:7 http://security.ubuntu.com precise-security/restricted Sources [1,950 B]
Get:8 http://security.ubuntu.com precise-security/universe Sources [19.3 kB]
Hit http://in.archive.ubuntu.com precise/main Sources
Hit http://in.archive.ubuntu.com precise/restricted Sources
Hit http://in.archive.ubuntu.com precise/universe Sources
Hit http://in.archive.ubuntu.com precise/multiverse Sources
Hit http://in.archive.ubuntu.com precise/main amd64 Packages
Hit http://in.archive.ubuntu.com precise/restricted amd64 Packages
Hit http://in.archive.ubuntu.com precise/universe amd64 Packages
Get:9 http://security.ubuntu.com precise-security/multiverse Sources [1,379 B]
Get:10 http://security.ubuntu.com precise-security/main amd64 Packages [215 kB]
Hit http://in.archive.ubuntu.com precise/multiverse amd64 Packages
Hit http://in.archive.ubuntu.com precise/main i386 Packages
Hit http://in.archive.ubuntu.com precise/restricted i386 Packages
Hit http://in.archive.ubuntu.com precise/universe i386 Packages
Hit http://in.archive.ubuntu.com precise/multiverse i386 Packages
Hit http://in.archive.ubuntu.com precise/main TranslationIndex
Hit http://in.archive.ubuntu.com precise/multiverse TranslationIndex
Hit http://in.archive.ubuntu.com precise/restricted TranslationIndex
Hit http://in.archive.ubuntu.com precise/universe TranslationIndex
Get:11 http://in.archive.ubuntu.com precise-updates/main Sources [200 kB]
Get:12 http://security.ubuntu.com precise-security/restricted amd64 Packages [3,969 B]
Get:13 http://security.ubuntu.com precise-security/universe amd64 Packages [60.8 kB]
Get:14 http://in.archive.ubuntu.com precise-updates/restricted Sources [4,419 B]
Get:15 http://in.archive.ubuntu.com precise-updates/universe Sources [69.8 kB]
Get:16 http://security.ubuntu.com precise-security/multiverse amd64 Packages [2,184 B]
Get:17 http://security.ubuntu.com precise-security/main i386 Packages [222 kB]
Get:18 http://in.archive.ubuntu.com precise-updates/multiverse Sources [4,240 B]
Get:19 http://in.archive.ubuntu.com precise-updates/main amd64 Packages [451 kB]
Get:20 http://security.ubuntu.com precise-security/restricted i386 Packages [3,968 B]
Get:21 http://security.ubuntu.com precise-security/universe i386 Packages [61.8 kB]
Get:22 http://security.ubuntu.com precise-security/multiverse i386 Packages [2,366 B]
Get:23 http://security.ubuntu.com precise-security/main TranslationIndex [74 B]
Get:24 http://security.ubuntu.com precise-security/multiverse TranslationIndex [71 B]
Get:25 http://security.ubuntu.com precise-security/restricted TranslationIndex [71 B]
Get:26 http://security.ubuntu.com precise-security/universe TranslationIndex [73 B]
Get:27 http://security.ubuntu.com precise-security/main Translation-en [105 kB]
Hit http://security.ubuntu.com precise-security/multiverse Translation-en
Hit http://security.ubuntu.com precise-security/restricted Translation-en
Get:28 http://in.archive.ubuntu.com precise-updates/restricted amd64 Packages [8,366 B]
Get:29 http://in.archive.ubuntu.com precise-updates/universe amd64 Packages [167 kB]
Get:30 http://security.ubuntu.com precise-security/universe Translation-en [37.4 kB]
Get:31 http://in.archive.ubuntu.com precise-updates/multiverse amd64 Packages [8,654 B]
Get:32 http://in.archive.ubuntu.com precise-updates/main i386 Packages [458 kB]
Ign http://extras.ubuntu.com precise/main Translation-en_US
Ign http://extras.ubuntu.com precise/main Translation-en
Get:33 http://in.archive.ubuntu.com precise-updates/restricted i386 Packages [8,374 B]
Get:34 http://in.archive.ubuntu.com precise-updates/universe i386 Packages [169 kB]
Ign http://extras.ubuntu.com precise/main Translation-en_IN
Get:35 http://in.archive.ubuntu.com precise-updates/multiverse i386 Packages [9,678 B]
Get:36 http://in.archive.ubuntu.com precise-updates/main TranslationIndex [3,564 B]
Get:37 http://in.archive.ubuntu.com precise-updates/multiverse TranslationIndex [2,605 B]
Get:38 http://in.archive.ubuntu.com precise-updates/restricted TranslationIndex [2,461 B]
Get:39 http://in.archive.ubuntu.com precise-updates/universe TranslationIndex [2,850 B]
Hit http://in.archive.ubuntu.com precise-backports/main Sources
Hit http://in.archive.ubuntu.com precise-backports/restricted Sources
Hit http://in.archive.ubuntu.com precise-backports/universe Sources
Hit http://in.archive.ubuntu.com precise-backports/multiverse Sources
Hit http://in.archive.ubuntu.com precise-backports/main amd64 Packages
Hit http://in.archive.ubuntu.com precise-backports/restricted amd64 Packages
Hit http://in.archive.ubuntu.com precise-backports/universe amd64 Packages
Hit http://in.archive.ubuntu.com precise-backports/multiverse amd64 Packages
Hit http://in.archive.ubuntu.com precise-backports/main i386 Packages
Hit http://in.archive.ubuntu.com precise-backports/restricted i386 Packages
Hit http://in.archive.ubuntu.com precise-backports/universe i386 Packages
Hit http://in.archive.ubuntu.com precise-backports/multiverse i386 Packages
Hit http://in.archive.ubuntu.com precise-backports/main TranslationIndex
Hit http://in.archive.ubuntu.com precise-backports/multiverse TranslationIndex
Hit http://in.archive.ubuntu.com precise-backports/restricted TranslationIndex
Hit http://in.archive.ubuntu.com precise-backports/universe TranslationIndex
Hit http://in.archive.ubuntu.com precise/main Translation-en
Hit http://in.archive.ubuntu.com precise/multiverse Translation-en
Hit http://in.archive.ubuntu.com precise/restricted Translation-en
Hit http://in.archive.ubuntu.com precise/universe Translation-en
Get:40 http://in.archive.ubuntu.com precise-updates/main Translation-en [221 kB]
Hit http://in.archive.ubuntu.com precise-updates/multiverse Translation-en
Hit http://in.archive.ubuntu.com precise-updates/restricted Translation-en
Get:41 http://in.archive.ubuntu.com precise-updates/universe Translation-en [99.8 kB]
Hit http://in.archive.ubuntu.com precise-backports/main Translation-en
Hit http://in.archive.ubuntu.com precise-backports/multiverse Translation-en
Hit http://in.archive.ubuntu.com precise-backports/restricted Translation-en
Hit http://in.archive.ubuntu.com precise-backports/universe Translation-en
Fetched 2,788 kB in 11s (238 kB/s)
Reading package lists... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
grep is already the newest version.
rfkill is already the newest version.
The following packages were automatically installed and are no longer required:
  diffstat linux-headers-3.2.0-29 linux-headers-3.2.0-29-generic quilt dkms module-assistant
Use 'apt-get autoremove' to remove them.
The following NEW packages will be installed:
  hwinfo libhal1 libhd16
0 upgraded, 3 newly installed, 0 to remove and 7 not upgraded.
Need to get 769 kB of archives.
After this operation, 2,246 kB of additional disk space will be used.
Get:1 http://in.archive.ubuntu.com/ubuntu/ precise/universe libhal1 amd64 0.5.14-8 [78.4 kB]
Get:2 http://in.archive.ubuntu.com/ubuntu/ precise/universe libhd16 amd64 16.0-2.1 [672 kB]
Get:3 http://in.archive.ubuntu.com/ubuntu/ precise/universe hwinfo amd64 16.0-2.1 [18.5 kB]
Fetched 769 kB in 3s (212 kB/s)
Selecting previously unselected package libhal1.
(Reading database ... 171550 files and directories currently installed.)
Unpacking libhal1 (from .../libhal1_0.5.14-8_amd64.deb) ...
Selecting previously unselected package libhd16.
Unpacking libhd16 (from .../libhd16_16.0-2.1_amd64.deb) ...
Selecting previously unselected package hwinfo.
Unpacking hwinfo (from .../hwinfo_16.0-2.1_amd64.deb) ...
Processing triggers for man-db ...
Setting up libhal1 (0.5.14-8) ...
Setting up libhd16 (16.0-2.1) ...
Setting up hwinfo (16.0-2.1) ...
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
  *-network
       description: Network controller
       product: BCM4312 802.11b/g LP-PHY
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:06:00.0
       version: 01
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: driver=b43-pci-bridge latency=0
       resources: irq:19 memory:f4700000-f4703fff
  *-network
       description: Ethernet interface
       product: NetLink BCM5906M Fast Ethernet PCI Express
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:07:00.0
       logical name: eth0
       version: 02
       serial: 00:1e:68:70:1d:06
       size: 100Mbit/s
       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=tg3 driverversion=3.121 duplex=full firmware=sb v3.04 ip=192.168.0.100 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
       resources: irq:47 memory:f4600000-f460ffff
  *-network DISABLED
       description: Wireless interface
       physical id: 1
       logical name: wlan0
       serial: 00:21:00:47:51:d3
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=b43 driverversion=3.2.0-35-generic firmware=666.2 link=no multicast=yes wireless=IEEE 802.11bg
0: ideapad_wlan: Wireless LAN
 Soft blocked: no
 Hard blocked: no
1: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: yes
2: ideapad_bluetooth: Bluetooth
 Soft blocked: yes
 Hard blocked: no
lo Interface doesn't support scanning.

wlan0 Interface doesn't support scanning : Network is down

eth0 Interface doesn't support scanning.

auto lo
iface lo inet loopback

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04.1 LTS"
06:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)
 Subsystem: Broadcom Corporation Device [14e4:04b5]
 Kernel driver in use: b43-pci-bridge
--
07:00.0 Ethernet controller [0200]: Broadcom Corporation NetLink BCM5906M Fast Ethernet PCI Express [14e4:1713] (rev 02)
 Subsystem: Lenovo IdeaPad S10e [17aa:3a23]
 Kernel driver in use: tg3
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 090c:3371 Silicon Motion, Inc. - Taiwan (formerly Feiya Technology Corp.)
Bus 004 Device 002: ID 045e:00cb Microsoft Corp. Basic Optical Mouse v2.0
RUNNING STATE WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
running connected disabled disabled enabled disabled
H/W path Device Class Description
======================================================
                               system Lenovo 3000 G430 ()
/0 bus LE6
/0/0 memory 110KiB BIOS
/0/4 processor Intel(R) Pentium(R) Dual CPU T3200 @ 2.00GHz
/0/4/5 memory 64KiB L1 cache
/0/4/6 memory 1MiB L2 cache
/0/f memory 4GiB System Memory
/0/f/0 memory 2GiB DIMM DDR2 Synchronous 667 MHz (1.5 ns)
/0/f/1 memory 2GiB DIMM DDR2 Synchronous 667 MHz (1.5 ns)
/0/100 bridge Mobile 4 Series Chipset Memory Controller Hub
/0/100/2 display Mobile 4 Series Chipset Integrated Graphics Controller
/0/100/2.1 display Mobile 4 Series Chipset Integrated Graphics Controller
/0/100/1a bus 82801I (ICH9 Family) USB UHCI Controller #4
/0/100/1a.1 bus 82801I (ICH9 Family) USB UHCI Controller #5
/0/100/1a.2 bus 82801I (ICH9 Family) USB UHCI Controller #6
/0/100/1a.7 bus 82801I (ICH9 Family) USB2 EHCI Controller #2
/0/100/1b multimedia 82801I (ICH9 Family) HD Audio Controller
/0/100/1c bridge 82801I (ICH9 Family) PCI Express Port 1
/0/100/1c.1 bridge 82801I (ICH9 Family) PCI Express Port 2
/0/100/1c.2 bridge 82801I (ICH9 Family) PCI Express Port 3
/0/100/1c.2/0 generic SD/MMC Host Controller
/0/100/1c.2/0.2 generic Standard SD Host Controller
/0/100/1c.2/0.3 generic MS Host Controller
/0/100/1c.3 bridge 82801I (ICH9 Family) PCI Express Port 4
/0/100/1c.3/0 network BCM4312 802.11b/g LP-PHY
/0/100/1c.5 bridge 82801I (ICH9 Family) PCI Express Port 6
/0/100/1c.5/0 eth0 network NetLink BCM5906M Fast Ethernet PCI Express
/0/100/1d bus 82801I (ICH9 Family) USB UHCI Controller #1
/0/100/1d.1 bus 82801I (ICH9 Family) USB UHCI Controller #2
/0/100/1d.2 bus 82801I (ICH9 Family) USB UHCI Controller #3
/0/100/1d.7 bus 82801I (ICH9 Family) USB2 EHCI Controller #1
/0/100/1e bridge 82801 Mobile PCI Bridge
/0/100/1f bridge ICH9M LPC Interface Controller
/0/100/1f.2 scsi0 storage 82801IBM/IEM (ICH9M/ICH9M-E) 2 port SATA Controller [IDE mode]
/0/100/1f.2/0 /dev/sda disk 160GB ST9160827AS
/0/100/1f.2/0/1 /dev/sda1 volume 149GiB Extended partition
/0/100/1f.2/0/1/5 /dev/sda5 volume 3529MiB Linux swap / Solaris partition
/0/100/1f.2/0/1/6 /dev/sda6 volume 145GiB Linux filesystem partition
/0/100/1f.2/1 /dev/cdrom disk DVD RW AD-7560S
/0/100/1f.3 bus 82801I (ICH9 Family) SMBus Controller
/0/100/1f.5 storage 82801IBM/IEM (ICH9M/ICH9M-E) 2 port SATA Controller [IDE mode]
/1 wlan0 network Wireless interface
Linux anil-Lappy-7 3.2.0-35-generic #55-Ubuntu SMP Wed Dec 5 17:42:16 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
[ 0.000000] No AGP bridge found
[ 0.000000] Found optimal setting for mtrr clean up
[ 0.000000] found SMP MP-table at [ffff8800000f6dc0] f6dc0
[ 0.000000] No NUMA configuration found
[ 0.000000] No AGP bridge found
[ 0.171226] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
[ 1.001196] ACPI: No dock devices found.
[ 1.001225] HEST: Table not found.
[ 1.053022] i2c-core: driver [aat2870] using legacy suspend method
[ 1.053022] i2c-core: driver [aat2870] using legacy resume method
[ 1.053022] usbcore: registered new interface driver usbfs
[ 1.053022] usbcore: registered new interface driver hub
[ 1.053022] usbcore: registered new device driver usb
[ 1.108120] Switching to clocksource hpet
[ 1.140044] pnp: PnP ACPI: found 10 devices
[ 1.276373] input: Lid Switch as /devices/LNXSYSTM:00/device:00/PNP0C0D:00/input/input0
[ 1.308049] ACPI: Lid Switch [LID]
[ 1.404195] ERST: Table is not found!
[ 1.608260] hub 1-0:1.0: USB hub found
[ 1.628167] hub 2-0:1.0: USB hub found
[ 1.628603] hub 3-0:1.0: USB hub found
[ 1.628975] hub 4-0:1.0: USB hub found
[ 1.629322] hub 5-0:1.0: USB hub found
[ 1.629672] hub 6-0:1.0: USB hub found
[ 1.630016] hub 7-0:1.0: USB hub found
[ 1.630379] hub 8-0:1.0: USB hub found
[ 1.630539] usbcore: registered new interface driver libusual
[ 1.651170] BIOS EDD facility v0.16 2004-Jun-25, 0 devices found
[ 1.984065] usb 2-3: new high-speed USB device number 2 using ehci_hcd
[ 2.360045] usb 4-2: new low-speed USB device number 2 using uhci_hcd
[ 6.522792] sdhci-pci 0000:05:00.0: SDHCI controller found [197b:2382] (rev 0)
[ 6.522890] mmc0: no vmmc regulator found
[ 6.527414] b43-pci-bridge 0000:06:00.0: PCI INT A -> GSI 19 (level, low) -> IRQ 19
[ 6.527428] b43-pci-bridge 0000:06:00.0: setting latency timer to 64
[ 6.527467] sdhci-pci 0000:05:00.2: SDHCI controller found [197b:2381] (rev 0)
[ 6.530401] input: Microsoft Microsoft Basic Optical Mouse v2.0 as /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/input/input5
[ 6.530570] generic-usb 0003:045E:00CB.0001: input,hidraw0: USB HID v1.11 Mouse [Microsoft Microsoft Basic Optical Mouse v2.0 ] on usb-0000:00:1a.1-2/input0
[ 6.530600] usbcore: registered new interface driver usbhid
[ 6.530602] usbhid: USB HID core driver
[ 6.544800] ssb: Core 0 found: ChipCommon (cc 0x800, rev 0x16, vendor 0x4243)
[ 6.544810] ssb: Core 1 found: IEEE 802.11 (cc 0x812, rev 0x0F, vendor 0x4243)
[ 6.544819] ssb: Core 2 found: PCMCIA (cc 0x80D, rev 0x0A, vendor 0x4243)
[ 6.544828] ssb: Core 3 found: PCI-E (cc 0x820, rev 0x09, vendor 0x4243)
[ 6.601781] tg3 0000:07:00.0: eth0: Tigon3 [partno(BCM95906) rev c002] (PCI Express) MAC address 00:1e:68:70:1d:06
[ 6.601787] tg3 0000:07:00.0: eth0: attached PHY is 5906 (10/100Base-TX Ethernet) (WireSpeed[0], EEE[0])
[ 6.601792] tg3 0000:07:00.0: eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] TSOcap[0]
[ 6.601796] tg3 0000:07:00.0: eth0: dma_rwctrl[76180000] dma_mask[64-bit]
[ 6.616335] ssb: Sonics Silicon Backplane found on PCI device 0000:06:00.0
[ 19.328410] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 19.441344] lp: driver loaded but no devices found
[ 19.755671] uvcvideo: Found UVC 1.00 device Lenovo EasyCamera (090c:3371)
[ 19.829262] input: Lenovo EasyCamera as /devices/pci0000:00/0000:00:1d.7/usb2/2-3/2-3:1.0/input/input7
[ 19.829357] usbcore: registered new interface driver uvcvideo
[ 19.913851] b43-phy0: Broadcom 4312 WLAN found (core revision 15)
[ 20.089996] Registered led device: b43-phy0::tx
[ 20.090071] Registered led device: b43-phy0::rx
[ 20.090128] Registered led device: b43-phy0::radio
[ 20.325840] Console: switching to colour frame buffer device 160x50
[ 20.971646] type=1400 audit(1358261285.816:11): apparmor="STATUS" operation="profile_load" name="/usr/lib/telepathy/mission-control-5" pid=865 comm="apparmor_parser"
[ 21.336339] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
[ 21.657659] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 21.659234] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 21.664650] b43-phy0: Radio hardware status changed to DISABLED
[ 21.784218] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 21.784749] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 23.373634] tg3 0000:07:00.0: eth0: Link is up at 100 Mbps, full duplex
[ 23.373639] tg3 0000:07:00.0: eth0: Flow control is on for TX and on for RX
[ 23.374207] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 34.168139] eth0: no IPv6 routers present
[ 234.352584] tg3 0000:07:00.0: eth0: Link is down
[ 239.266628] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 260.802415] tg3 0000:07:00.0: eth0: Link is up at 100 Mbps, full duplex
[ 260.802419] tg3 0000:07:00.0: eth0: Flow control is on for TX and on for RX
[ 260.803631] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 271.752186] eth0: no IPv6 routers present
 Release Date: 07/11/2008
  Serial services are supported (int 14h)
 Manufacturer: LENOVO
 Product Name: Lenovo 3000 G430
 Serial Number: LE6B83409CFBNNN
 Manufacturer: Lenovo
 Product Name: LE6
 Serial Number:
 Manufacturer: Lenovo
 Serial Number:
 Manufacturer: Intel
 Serial Number: Not Specified
 Port Type: Serial Port 16550A Compatible
 Manufacturer: Not Specified
 Serial Number: 00001075
 Manufacturer: Not Specified
 Serial Number: 00001111
lo no wireless extensions.

wlan0 IEEE 802.11bg ESSID:off/any
          Mode:Managed Access Point: Not-Associated Tx-Power=off
          Retry long limit:7 RTS thr:off Fragment thr:off
          Power Management:off

eth0 no wireless extensions.

install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq-midi ; : ; }
# which ath5k cannot recover. To prevent this condition, stop
blacklist ath_pci
blacklist eth1394
# replaced by p54pci
blacklist prism54
# replaced by b43 and ssb.
blacklist bcm43xx
blacklist wl
blacklist uart6850
blacklist twl4030_wdt

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
> hal.1: read hal dataprocess 3782: arguments to dbus_move_error() were incorrect, assertion "(dest) == NULL || !dbus_error_is_set ((dest))" failed in file ../../dbus/dbus-errors.c line 282.
This is normally a bug in some application using the D-Bus library.
libhal.c 3483 : Error unsubscribing to signals, error=The name org.freedesktop.Hal was not provided by any .service files
33: PCI 600.0: 0282 WLAN controller
  [Created at pci.318]
  Unique ID: y9sn.2XuLWNuSTT1
  Parent ID: Z7uZ.2fCnKYRPo2D
  SysFS ID: /devices/pci0000:00/0000:00:1c.3/0000:06:00.0
  SysFS BusID: 0000:06:00.0
  Hardware Class: network
  Model: "Broadcom BCM4312 802.11b/g"
  Vendor: pci 0x14e4 "Broadcom"
  Device: pci 0x4315 "BCM4312 802.11b/g"
  SubVendor: pci 0x14e4 "Broadcom"
  SubDevice: pci 0x04b5
  Revision: 0x01
  Driver: "b43-pci-bridge"
  Driver Modules: "ssb"
  Device File: wlan0
  Features: WLAN
  Memory Range: 0xf4700000-0xf4703fff (rw,non-prefetchable)
  IRQ: 19 (20279 events)
  HW Address: 00:21:00:47:51:d3
  Link detected: no
  WLAN channels: 1 2 3 4 5 6 7 8 9 10 11 12 13 14
  WLAN frequencies: 2.412 2.417 2.422 2.427 2.432 2.437 2.442 2.447 2.452 2.457 2.462 2.467 2.472 2.484
  WLAN encryption modes: WEP40 WEP104 TKIP CCMP
  WLAN authentication modes: open sharedkey wpa-psk wpa-eap
  Module Alias: "pci:v000014E4d00004315sv000014E4sd000004B5bc02sc80i00"
  Driver Info #0:
    Driver Status: ssb is active
    Driver Activation Cmd: "modprobe ssb"
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #19 (PCI bridge)

34: PCI 700.0: 0200 Ethernet controller
  [Created at pci.318]
  Unique ID: rBUF.82aDCkxfolF
  Parent ID: HnsE.8Y9eSUtbfo5
  SysFS ID: /devices/pci0000:00/0000:00:1c.5/0000:07:00.0
  SysFS BusID: 0000:07:00.0
  Hardware Class: network
  Model: "Broadcom NetLink BCM5906M Fast Ethernet PCI Express"
  Vendor: pci 0x14e4 "Broadcom"
  Device: pci 0x1713 "NetLink BCM5906M Fast Ethernet PCI Express"
  SubVendor: pci 0x17aa "Lenovo"
  SubDevice: pci 0x3a23
  Revision: 0x02
  Driver: "tg3"
  Driver Modules: "tg3"
  Device File: eth0
  Memory Range: 0xf4600000-0xf460ffff (rw,non-prefetchable)
  IRQ: 47 (26690 events)
  HW Address: 00:1e:68:70:1d:06
  Link detected: yes
  Module Alias: "pci:v000014E4d00001713sv000017AAsd00003A23bc02sc00i00"
  Driver Info #0:
    Driver Status: tg3 is active
    Driver Activation Cmd: "modprobe tg3"
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #20 (PCI bridge)
Warning: bad ps syntax, perhaps a bogus '-'? See http://procps.sf.net/faq.html
root 791 0.0 0.1 237724 5392 ? Ssl 20:18 0:00 NetworkManager
root 1015 0.0 0.0 31576 1260 ? Ss 20:18 0:00 /sbin/wpa_supplicant -B -P /run/sendsigs.omit.d/wpasupplicant.pid -u -s -O /var/run/wpa_supplicant
root 2417 0.0 0.0 7264 1552 ? S 20:22 0:00 /sbin/dhclient -d -4 -sf /usr/lib/NetworkManager/nm-dhcp-client.action -pf /var/run/sendsigs.omit.d/network-manager.dhclient-eth0.pid -lf /var/lib/dhcp/dhclient-ea94fa00-cc1d-4c57-8583-4147c0402881-eth0.lease -cf /var/run/nm-dhclient-eth0.conf eth0
nobody 2420 0.0 0.0 33020 1276 ? S 20:22 0:00 /usr/sbin/dnsmasq --no-resolv --keep-in-foreground --no-hosts --bind-interfaces --pid-file=/var/run/sendsigs.omit.d/network-manager.dnsmasq.pid --listen-address=127.0.0.1 --conf-file=/var/run/nm-dns-dnsmasq.conf --cache-size=0 --proxy-dnssec
anil 3796 0.0 0.0 13584 904 pts/0 S+ 20:45 0:00 egrep --color=auto wpa|icd|etwork
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.0.1
Module Size Used by
joydev 17693 0
rfcomm 47604 0
bnep 18281 2
bluetooth 180153 10 rfcomm,bnep
parport_pc 32866 0
ppdev 17113 0
snd_hda_codec_conexant 62358 1
snd_hda_intel 33773 2
snd_hda_codec 127706 2 snd_hda_codec_conexant,snd_hda_intel
snd_hwdep 17764 1 snd_hda_codec
snd_pcm 97275 2 snd_hda_intel,snd_hda_codec
snd_seq_midi 13324 0
snd_rawmidi 30748 1 snd_seq_midi
arc4 12529 2
snd_seq_midi_event 14899 1 snd_seq_midi
b43 365819 0
snd_seq 61929 2 snd_seq_midi,snd_seq_midi_event
mac80211 506862 1 b43
snd_timer 29990 2 snd_pcm,snd_seq
snd_seq_device 14540 3 snd_seq_midi,snd_rawmidi,snd_seq
psmouse 97485 0
serio_raw 13211 0
uvcvideo 72627 0
videodev 98259 1 uvcvideo
v4l2_compat_ioctl32 17128 1 videodev
cfg80211 205774 2 b43,mac80211
snd 79041 13 snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
bcma 26696 1 b43
i915 477545 3
jmb38x_ms 17646 0
soundcore 15091 1 snd
memstick 16569 1 jmb38x_ms
snd_page_alloc 18529 2 snd_hda_intel,snd_pcm
drm_kms_helper 46978 1 i915
drm 241971 4 i915,drm_kms_helper
ideapad_laptop 18234 0
i2c_algo_bit 13423 1 i915
wmi 19256 0
sparse_keymap 13890 1 ideapad_laptop
video 19596 1 i915
mac_hid 13253 0
lp 17799 0
parport 46562 3 parport_pc,ppdev,lp
tg3 152032 0
ssb 52752 1 b43
sdhci_pci 18826 0
sdhci 33205 1 sdhci_pci
usbhid 47238 0
hid 99636 1 usbhid
anil@anil-Lappy-7:~$

First of all, please copy-paste the following commands into the Terminal (using a working, WIRED Internet connection) to ensure the required firmware is installed:

sudo apt-get update
sudo apt-get install firmware-b43-lpphy-installer

Furthermore, your Terminal output shows the following issue:

  *-network DISABLED
       description: Wireless interface
       physical id: 1

1: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: yes

RUNNING STATE WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
running connected disabled disabled enabled disabled

[ 21.664650] b43-phy0: Radio hardware status changed to DISABLED

wlan0 IEEE 802.11bg ESSID:off/any
          Mode:Managed Access Point: Not-Associated Tx-Power=off
          Retry long limit:7 RTS thr:off Fragment thr:off
          Power Management:off

So your wireless card is probably disabled by a hardware switch, a
special key combination (Fn-F2, etc...), by incorrect BIOS settings for
wireless, or a COMBINATION of these factors...

There might also be a BIOS option that allows you to have the wireless
functionality controlled "By application"

Search for the "by application" option in the BIOS and select it (if
possible)....

Then reboot and retest wireless.

Also run the following Terminal commands to try to change the rfkill
state of your wireless chipset after rebooting:

rfkill unblock all

sudo rfkill unblock all

Then retest wireless.

Anil Gobburi (anil-gobburi) said : #4

I had my laptop checked with a Laptop Service Center here and it turns out to be a BIOS issue.
Issue is resolved now and am able to connect to wireless networks. I will keep this under observation. Thank you so much!

Anil Gobburi (anil-gobburi) said : #5

Thanks Mark Rijckenberg, that solved my question.