Arch Linux

lurst

Member

Registered: 2008-06-25

Posts: 8

Can't find wireless networks

Hi guys,

I've installed my wireless card perfectly, here some proof:

$ iwconfig
lo        no wireless extensions.

wmaster0  no wireless extensions.

wlan0     IEEE 802.11abg  ESSID:""  
          Mode:Managed  Frequency:2.412 GHz  Access Point: Not-Associated   
          Tx-Power=15 dBm   
          Retry min limit:7   RTS thr:off   Fragment thr=2352 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

eth0      no wireless extensions.

pan0      no wireless extensions.

But I just can't find a router which is just some centimetres away.
My card is not broken because in Windows I can connect flawlessly to my router.
No, my network is not hidden.

It's an intel  3495 card.

Last edited by lurst (2009-02-10 22:36:09)

zenlord

Member

From: Belgium

Registered: 2006-05-24

Posts: 1,221

Website

Re: Can't find wireless networks

Could you please give some more information as to what you have done already and what kind of output or errormessages you have gotten?

Otherwise this'll be just 'shooting in the dark'

Zl.

dcrabs

Member

From: Sweden

Registered: 2008-10-03

Posts: 149

Re: Can't find wireless networks

Hm I have similar problems from time to time. Then I found out that it was firmware related. I switched my laptop off and took out the battery and started again.
It seems that it has some problems loading the firmware sometimes.
david

lurst

Member

Registered: 2008-06-25

Posts: 8

Re: Can't find wireless networks

Could you please give some more information as to what you have done already and what kind of output or errormessages you have gotten?

Otherwise this'll be just 'shooting in the dark'

Zl.

Sure, before the change in the wireless driver (from ipw3945 to iwl3945) my wireless was working ok, then after I remove the first driver and install the new one, it just couldn't find any wireless network. I wasn't worried because I use cable, but now I'm worried . I have the module on my rc.conf and it works fine, I can change the mode, can put it up or down with ifconfig wlan0 up/down. I just can't find any wireless network, nor with networkmanager, nor with iwlist scan.

What else do you need to know?

ralvez

Member

From: Canada

Registered: 2005-12-06

Posts: 1,694

Website

Re: Can't find wireless networks

If have not cleared your cache you can downgrade to the working driver and you should have a working wifi again.

R.

lurst

Member

Registered: 2008-06-25

Posts: 8

Re: Can't find wireless networks

If have not cleared your cache you can downgrade to the working driver and you should have a working wifi again.

R.

No, I didn't store the cache, but even if I did, I don't want to downgrade the driver, if we have a new one and the other e deprecated, the new one should be working. I don't know if I'm the only one with this issue, but would like to know if I'm alone here.

mcover

Member

From: Germany

Registered: 2007-01-25

Posts: 134

Re: Can't find wireless networks

Your router doesn't happen to use an exotic wireless channel? If so you need to setup crda.

If thats not the problem what does dmesg tell you about your wifi device? (dmesg|grep iwl)

iwlwifi-3945-ucode?

m.

zenlord

Member

From: Belgium

Registered: 2006-05-24

Posts: 1,221

Website

Re: Can't find wireless networks

and don't forget 'lsmod' to see if your iwl-module is loaded. Besides, the iwl-driver is included in the kernel, so you don't have to specify it in your rc.conf (unless you don't use autoload).

Zl.
PS: the answers in this thread really tell you that, whenever a problem occurs, you need to provide as much details as you can. Dig up logs and provide feedback by the programs you tried. At this point no one can tell you what the exact problem is. Maybe you're lucky and someone will guess your problem, but the odds are far greater that this doesn't happen.

lurst

Member

Registered: 2008-06-25

Posts: 8

Re: Can't find wireless networks

Your router doesn't happen to use an exotic wireless channel? If so you need to setup crda.

If thats not the problem what does dmesg tell you about your wifi device? (dmesg|grep iwl)

iwlwifi-3945-ucode?

m.

 dmesg | grep iwl
iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, 1.2.26ks
iwl3945: Copyright(c) 2003-2008 Intel Corporation
iwl3945 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
iwl3945 0000:03:00.0: setting latency timer to 64
iwl3945: Detected Intel Wireless WiFi Link 3945ABG
iwl3945: Tunable channels: 13 802.11bg, 23 802.11a channels
phy0: Selected rate control algorithm 'iwl-3945-rs'
iwl3945 0000:03:00.0: PCI INT A disabled
iwl3945 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
iwl3945 0000:03:00.0: restoring config space at offset 0x1 (was 0x100002, writing 0x100006)
iwl3945 0000:03:00.0: irq 762 for MSI/MSI-X
iwl3945 0000:03:00.0: firmware: requesting iwlwifi-3945-1.ucode
Registered led device: iwl-phy0:radio
Registered led device: iwl-phy0:assoc
Registered led device: iwl-phy0:RX
Registered led device: iwl-phy0:TX

lsmod | grep iw
iwl3945                91128  0 
rfkill                 11724  2 iwl3945
mac80211              161184  1 iwl3945
led_class               5508  2 asus_laptop,iwl3945
cfg80211               31760  2 iwl3945,mac80211

And I have that iwlwifi-3945-ucode installed.