[SOLVED] Unable to connect to internet from ubuntu

sree_ec · 09-29-2010, 01:39 PM

Hi All,

I have a new laptop with me and I am unable to connect to internet from It.
i have a wireless router with WLAN connection. I am able to connect from windows 7
But in ubuntu the network manager doesnt show any WLAN connections at all..
I am a newbie and dont know how to start debugging this Issue.
I may like to know,
1. How to ensure that my linux distro has detected network card on my system as the first step
2.Then how to make the wireless connection UP and running.

Thanks in advance

janhe · 09-29-2010, 02:58 PM

Look if the card is working:

Code:

iwconfig

If it isn't working, run this to find which chipset it uses:

Code:

lsusb

or

Code:

lspci

Maybe you need to put "sudo" in front of some of these commands.

Please post the output from these commands

sree_ec · 09-30-2010, 01:21 PM

Thanks ..
Please see the output.. It seems it is not detecting anything

Quote:

h@p:~$ iwconfig
lo no wireless extensions.

h@p:~$ lsusb
Bus 002 Device 002: ID 8087:0020
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 007: ID 413c:8162 Dell Computer Corp.
Bus 001 Device 006: ID 413c:8161 Dell Computer Corp.
Bus 001 Device 005: ID 0bda:0138 Realtek Semiconductor Corp.
Bus 001 Device 004: ID 0c45:641d Microdia
Bus 001 Device 003: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of BCM2046 Bluetooth)
Bus 001 Device 002: ID 8087:0020
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
h@p:~$ lspci
00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 18)
00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 18)
00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06)
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 06)
00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 06)
00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 06)
00:1c.5 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 6 (rev 06)
00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a6)
00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 06)
00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Controller (rev 06)
00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 06)
00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 06)
02:00.0 VGA compatible controller: ATI Technologies Inc Manhattan [Mobility Radeon HD 5000 Series]
02:00.1 Audio device: ATI Technologies Inc Manhattan HDMI Audio [Mobility Radeon HD 5000 Series]
04:00.0 Network controller: Broadcom Corporation Device 4727 (rev 01)
05:00.0 Ethernet controller: Atheros Communications AR8152 v1.1 Fast Ethernet (rev c1)
ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 05)
ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 05)
ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 05)
ff:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 05)
ff:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 05)
ff:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 05)
h@p:~$

TB0ne · 09-30-2010, 02:14 PM

Quote:

Originally Posted by sree_ec

Thanks ..
Please see the output.. It seems it is not detecting anything

It would help if you told us what version/distro of Linux you're using, and what KIND of laptop. And the lspci clearly DID show something:

Quote:

Originally Posted by sree_ec

05:00.0 Ethernet controller: Atheros Communications AR8152 v1.1 Fast Ethernet (rev c1)

Looks like an ethernet/wifi interface to me. Again, tell us what version/distro of Linux, and perhaps we can help. Google might also be able to tell you how to get it working too.

enyawix · 09-30-2010, 02:20 PM

The Atheros network interface is a problem child. Install the package called MadWifi.

TB0ne · 09-30-2010, 03:07 PM

Quote:

Originally Posted by enyawix

The Atheros network interface is a problem child. Install the package called MadWifi.

Only if you need it. openSUSE works just fine with it, without the MadWifi.

TobiSGD · 09-30-2010, 03:37 PM

Maybe I am puzzled here, but the Atheros AR8152 is a fast ethernet controller, so why madwifi? It's cable.
The Wireless-Interface in this machine seems to be this:

Quote:

Network controller: Broadcom Corporation Device 4727 (rev 01)

The Broadcom-driver for this chip is not installed by default, it has to be installed using Ubuntus tool for proprietary drivers (sorry, don't know the name, as I'm not using Ubuntu). To do this, your laptop has to be connected to the Internet, so you have to use a wired connection to install the wireless driver.

sree_ec · 09-30-2010, 11:15 PM

Quote:

Originally Posted by TB0ne

It would help if you told us what version/distro of Linux you're using, and what KIND of laptop. And the lspci clearly DID show something:

Looks like an ethernet/wifi interface to me. Again, tell us what version/distro of Linux, and perhaps we can help. Google might also be able to tell you how to get it working too.

It is Ubuntu Ultimate Edition
My laptop is DELL Inspiron 14R
I also think that the Broadcom is the WIFI controller in my system. I dont have laptop with me now. So I will confirm looking at the specs as soon as I get near to It

Will MadWifi help?

sree_ec · 09-30-2010, 11:17 PM

Quote:

Originally Posted by TobiSGD

Maybe I am puzzled here, but the Atheros AR8152 is a fast ethernet controller, so why madwifi? It's cable.
The Wireless-Interface in this machine seems to be this:
The Broadcom-driver for this chip is not installed by default, it has to be installed using Ubuntus tool for proprietary drivers (sorry, don't know the name, as I'm not using Ubuntu). To do this, your laptop has to be connected to the Internet, so you have to use a wired connection to install the wireless driver.

Thanks for the reply.
Will I be able to download it with Windows 7 and then install later in ubuntu?

TobiSGD · 09-30-2010, 11:39 PM

Quote:

Originally Posted by sree_ec

Thanks for the reply.
Will I be able to download it with Windows 7 and then install later in ubuntu?

Sorry, I don't know, as I am not an Ubuntuist. I also have Broadcomm wireless (bcm4312-lpphy) in my laptop, but using Debian I only had to apt-get the firmware-installer from the non-free repos. Installation was done automatically. I think, easiest way to install it is getting your laptop wired.

sree_ec · 10-01-2010, 01:11 AM

Quote:

Originally Posted by TobiSGD

Sorry, I don't know, as I am not an Ubuntuist. I also have Broadcomm wireless (bcm4312-lpphy) in my laptop, but using Debian I only had to apt-get the firmware-installer from the non-free repos. Installation was done automatically. I think, easiest way to install it is getting your laptop wired.

What did you mean by non-free repos?
Can you give me the link from which you tried or the command you tried?

I think apt-get is available in ubuntu....

sree_ec · 10-01-2010, 08:48 AM

Quote:

Originally Posted by sree_ec

What did you mean by non-free repos?
Can you give me the link from which you tried or the command you tried?

I think apt-get is available in ubuntu....

I checked my windowss 7 configuration to see which is my wireless card.

Win7 says it is Broadcom Dw1501 Wireless-N WLAN Half Mini card on PCI 4

sree_ec · 10-01-2010, 09:38 AM

Quote:

Originally Posted by TB0ne

Only if you need it. openSUSE works just fine with it, without the MadWifi.

Sorry All, for a quick change over. I changed my OS to OpenSuse 11.3 hoping that something good will happen.. But no change in the state of internet/wlan. Any OpenSuse experts here to help???

janhe · 10-01-2010, 10:39 AM

You will need the driver for your wireless card.

You will need the "802.11 Linux STA driver" according to broadcom's site: http://www.broadcom.com/support/802.11/linux_sta.php

You'll need to use the Opensuse package manager to install that.

Can you plug in a network cable to temporarily get a internet connection?

enyawix · 10-01-2010, 08:11 PM

Quote:

Originally Posted by sree_ec

It is Ubuntu Ultimate Edition
My laptop is DELL Inspiron 14R
I also think that the Broadcom is the WIFI controller in my system. I dont have laptop with me now. So I will confirm looking at the specs as soon as I get near to It

Will MadWifi help?

A google for Broadcom and MadWifi showed MadWifi supporting the broadcom device. MadWifi should solve your problem.