View Full Version : [ubuntu] Wifi woes - system info inside

December 15th, 2008, 07:44 PM
I can't get my wifi to work, any help will be greatly appreciated

Output from sudo lshw -C network:

description: Network controller
product: PRO/Wireless 3945ABG Network Connection
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:0b:00.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=iwl3945 latency=0 module=iwl3945

and iwconfig:

lo no wireless extensions.

eth0 no wireless extensions.

I've installed Wifi Radar and can't (of course) not see any networks.

Under System > Administration > Hardware Driver only Nvidia Accelerated graphics driver (latest cards) show up.

I know I need to find a driver for my Intel pro 3945 wifi, but can't.
If memory serves (which it rarely does) this is the chipset: Mobile Intel 965PM (I'm on a Dell XPS M1530)

For reference: the xp partition can connect w/o problems.

December 15th, 2008, 07:49 PM
According to this site the card should work out of the box:
But that info does not help you.


sudo /etc/init.d/networking restartpost
iwconfig again
and also

cat /etc/network/interfaces

December 15th, 2008, 07:56 PM
First of all thanks for helping a complete Linux newbie :)

sudo /etc/init.d/networking restart (= win: ipconfig /release + /renew??)

* Reconfiguring network interfaces... [ OK ]
nico@nico-laptop:~$ iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

cat /etc/network/interfaces

auto lo
iface lo inet loopback

December 15th, 2008, 08:02 PM
Can you also post the output from

sudo iwlist scan

Do you recognize your wireless network somewhere?

December 15th, 2008, 08:08 PM
nico@nico-laptop:~$ sudo iwlist scan
[sudo] password for nico:
lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.
Uhm, that would be a no ;)

December 15th, 2008, 08:23 PM
hmmm. these folks seem to be having a similar problem


Could you post the output of

uname -a

which will tell you what version of the kernel you're running.

December 15th, 2008, 08:25 PM
Oops, sorry 'bout that, I'm on 8.04 (HH?)

Linux nico-laptop 2.6.24-22-generic #1 SMP Mon Nov 24 18:32:42 UTC 2008 i686 GNU/Linux

December 15th, 2008, 08:40 PM
Looked around a bit and found these interesting links, not sure it's a good idea to add either though (yes, I'm still geting used to repositories after so many years on Win ;) )




Also did a search for 'wireless' in Synaptics and found the following installed:
libiw29 - Wireless tools - library - Installed version: 29-lubuntu2
ndiswrapper-common - Common scripts required to use the utilities for ndiswrapper - Installed version: 1.50-lubuntu1
pcmciautils - PCMCIA utilities for Linux 2.6 - Installed version: 014-4ubuntu1
wireless-tools - Tools for manipulating Linux Wireless Extensions - Installed version: 29lubuntu2
wpasupplicant - Client support for WPA and WPA2 (IEEE 802.11i) - Installed version: 0.6.0+0.5.8 Oubunt

December 15th, 2008, 09:26 PM
hm, strangest thing just happened.
I just enabled BlueTooth on the side of my laptop, then disabled it again (I disabled BT from services yesterday), and now this is the output from iwconfig

nico@nico-laptop:~$ iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

wmaster0 no wireless extensions.

wlan0 IEEE 802.11g ESSID:"" Nickname:""
Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
Tx-Power=27 dBm
Retry min limit:7 RTS thr:off Fragment thr=2346 B
Power Management:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

... but wait it gets a bit stranger. From my other comp I can see an unknown wifi device connected (this one), but from this one I can see no networks on either Wifi Radar or Wireless Networks.
This comp is also listed as connected to None but with an IP given by the router (which has WPA2 enabled).

December 15th, 2008, 11:24 PM
See anything different about me??
Yup, that's right, I got my wifi to work.

As a reference for other newbies having trouble with wifi, here's what I did.

1: Read the instruction manual to my new laptop, and found out the button on the right side wasn't for dis- and enabling Blue Tooth, it was for wifi (Why Dell chose a BT icon for this, I wil never know).

2: Installed Wcid (instructions here (http://wicd.sourceforge.net/download.php) ... add repository, add app)

3: Run Wcid (really, really intuitive)

4: Click wifi ESSID > Advanced > mark Use Encryption > Choose encryption for your router > type in password and THIS IS IMPORTANT*: make sure you type the right one (mark the empty box at the bottom right to see the actual key)

5: Click OK

6: Click connect

*yes, that's right. I mistyped my password on several times :oops: ](*,)
On the plus side, I did learn some new nifty commands for the terminal

7: Say thank you to anyone who took the time to help you out.

December 16th, 2008, 12:15 AM
Its always the simplest thing ;)

Why not use Network Manager?

December 16th, 2008, 07:20 AM
It kept changing encryption from WPA2 to WPA, of course this was before I discovered the error was me