unable to use wireless connection

kapildhal · 02-23-2010, 04:01 AM

recently installed ubuntu 9.10 on my HP pavalion DV4 laptop all the things are working fine except wireless connection. I am unable to connect to the wifi network. pls. help

Mr-Bisquit · 02-23-2010, 04:12 AM

Connect to the internet with a cable.
Use the ubuntuforums, here, and google.com to search.

You will need to type

Code:

 ifconfig -a

to see which interface is active.

Code:

dmesg | grep ethX <X being the non active NIC>
ifconfig ethX up
iwconfig ethX essid any

You also will need to look at the specs to be able see which wireless driver you need.
Have you installed wireless tools?

pixellany · 02-23-2010, 06:23 AM

I would take it in a slightly different order:

First: "iwconfig" (In Ubuntu, probablyl "sudo iwconfig"
This tells you if you have a working wireless device.....If all the devices say "no wireless extensions", then you need to install a driver. For this, we need the specs on your wireless card. Probably the easiest way to find this is "lspci"

The commands in quotes are entered in a terminal. If you haven't found this already, look through your menus.

reed9 · 02-23-2010, 08:27 AM

We definitely need more information. Open a terminal.

Type in the following and post the output of each.

Code:

lspci | grep -i net
lsmod
dmesg | grep firmware

schneidz · 02-23-2010, 11:51 AM

please post the output to:

Code:

lspci # will tell us the pci devices you have in your system.
lsusb # will tell us the usb devices you have in your system.
ifconfig # will tell us what network interface cards that are turned on you have on your system.
ifconfig -a # will list all network interface cards you have on your 
iwconfig # will tell us which of your network interface cards has wireless capability 
lsmod # will list the modules that are loaded on your system.

sudo iwlist <network-card> scan # this will use the <network-card> interface (that from the iwconfig command above) and scan for wireless routers that are accessible.
sudo iwconfig <network-card> essid <your-router-name> # assuming no security (the access point names will be provided by the previous iwlist command).
sudo dhclient # will attempt to get ip-address, subnet mask, dns server information automatically from your router assuming dhcp is turned on on your router.

it would be easier for us to read if it is in [code] tags.