Arch Linux

dyscoria

Member

Registered: 2008-01-10

Posts: 1,007

[SOLVED] wlan0 not detected

My wireless network worked previously with these in /etc/rc.conf:

wlan0="dhcp"
wlan_wlan0="wlan0 essid blah key blah"
WLAN_INTERFACES=(wlan0)
INTERFACES=(wlan0)

Now it's stopped working for some reason and cannot even be detected, let alone configured:

$ lspci
0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)

$ lsmod
iwl3945

$ /etc/rc.d/network start
:: Starting Network
[BUSY] err, wlan0: ioctl SIOCGIFHWADDR: No such device

$ iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

$ ifconfig wlan0 up
wlan0: unknown interface: No such device

$ netcfg2 home
:: home up  - Interface wlan0 is not a wireless interface                       [FAIL]

Last edited by dyscoria (2008-03-22 17:28:20)

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dyscoria

Member

Registered: 2008-01-10

Posts: 1,007

Re: [SOLVED] wlan0 not detected

My wireless is working fine in my ubuntu partition, but the only interfaces detected in arch are 'lo' and 'eth0'.

It worked a month ago. I leave home, come back, and suddenly 'wlan0' has disappeared. Does anybody have any idea why?

I've tried netcfg2 with NETWORKS=(blah) and DAEMONS=(...net-profiles...), but it complains that wlan0 isn't an interface.
I've tried the NET-PROFILES=() line in rc.conf

The only thing I can think of is a missing module. Surely iwl3945 is all I need?

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alexmgarcia

Member

From: Azores, Portugal

Registered: 2007-05-14

Posts: 51

Re: [SOLVED] wlan0 not detected

Hmm, I use iwl3945 too and it is ok.
Do you have iwlwifi-3945-ucode installed?

tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,604

Re: [SOLVED] wlan0 not detected

Unload and reload the module and check what dmesg says.

dyscoria

Member

Registered: 2008-01-10

Posts: 1,007

Re: [SOLVED] wlan0 not detected

Hmm, I use iwl3945 too and it is ok.
Do you have iwlwifi-3945-ucode installed?

Unload and reload the module and check what dmesg says.

Here's my output from dmesg:

iwl3945: iwlwifi-3945-1.ucode firemware file req failed: Reason -2

Installed iwlwifi-3945-ucode and all is good. Thanks for the help

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alexmgarcia

Member

From: Azores, Portugal

Registered: 2007-05-14

Posts: 51

Re: [SOLVED] wlan0 not detected

Nice!

tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,604

Re: [SOLVED] wlan0 not detected

Can't imagine how it worked before if you've only installed the ucode package now... :?

dyscoria

Member

Registered: 2008-01-10

Posts: 1,007

Re: [SOLVED] wlan0 not detected

Can't imagine how it worked before if you've only installed the ucode package now... :?

Pfff, beats me. "pacman -Rs iwl3945-ucode" isn't the easiest of commands to type by accident

Only explanation is that some sick bastard hacked passed my firewall and deleted that one package for a laugh, giving me hours of bemused puzzlement.

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knock-once 1.2: BASH script to easily create/send one-time sequences for knockd (forum/AUR)