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#1 2008-03-05 06:36:23

greenfuse
Member
Registered: 2008-02-14
Posts: 57

SOLVED wlan0 not found by ifconfig

Network interface device is a wireless usb D-Link DWL-G122 C1.
Laptop Dell Latitude C600
kernel-2.6.24-ARCH
I am new to Arch, with some Linux experience. Arch is nice and seems right for my old laptop, but this problem has stumped me. The wireless interface was working for a while then it just stopped coming up - I don't know what triggered the failure, maybe an upgrade, or perhaps deleting the old serialmonkey driver rt73 modules (which no longer worked with the new kernel but sometimes still loaded and needed a 'modprobe -r')

[root@laptop ~]# ifconfig wlan0 up 
SIOCSIFFLAGS: No such file or directory

But wlan0 shows up here

[root@laptop ~]# cat /proc/net/wireless 
Inter-| sta-|   Quality        |   Discarded packets               | Missed | WE
 face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon | 22
 wlan0: 0000    0     0     0        0      0      0      0      0        0

and also shows in in /proc/net/dev - along with lo and wmaster0.
The driver modules seem to be present (modified list to reduce the post size, hopefully contains relevant items)

[root@laptop ~]# lsmod
Module                  Size  Used by
rt73usb                24320  0 
rt2x00usb               9216  1 rt73usb
rt2x00lib              17920  2 rt73usb,rt2x00usb
rfkill                  5904  1 rt2x00lib
input_polldev           3720  1 rt2x00lib
crc_itu_t               2304  1 rt2x00lib
mac80211              117132  2 rt2x00usb,rt2x00lib

Interestingly I am unable to remove the module rt73 with 'modprobe -r' or 'rmmod'.
/etc/modprobe.conf has 'alias wlan0 rt73usb' as it's only entry. The device is listed with lsusb. I can find no clues in dmsg or /var/log/messages.log when grepping for wlan0. The same failure occurs with 'netcfg2 wlan0' and also when using wpa_supplicant to try to connect.
Any help with solving this problem would be appreciated.

Last edited by greenfuse (2008-03-05 22:58:07)

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#2 2008-03-05 08:41:01

iphitus
Forum Fellow
From: Melbourne, Australia
Registered: 2004-10-09
Posts: 4,927

Re: SOLVED wlan0 not found by ifconfig

Seems like you need the firmware for that driver.

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#3 2008-03-05 21:26:38

greenfuse
Member
Registered: 2008-02-14
Posts: 57

Re: SOLVED wlan0 not found by ifconfig

The device works ok on the laptop with winxp and with a backtrack live cd. I am reluctant to mess with the firmware - unfamiliar territory.

I will try to install an older kernel and see how the rt73 driver goes, it won't work with kernel-2.6.24

Last edited by greenfuse (2008-03-05 21:34:13)

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#4 2008-03-05 21:31:35

zenlord
Member
From: Belgium
Registered: 2006-05-24
Posts: 1,221
Website

Re: SOLVED wlan0 not found by ifconfig

I assume you have seen this page: http://wiki.archlinux.org/index.php/RT73_Wireless ?

HTH,
Zl.

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#5 2008-03-05 21:58:30

greenfuse
Member
Registered: 2008-02-14
Posts: 57

Re: SOLVED wlan0 not found by ifconfig

Yes zenlord it is pretty much what I did with the rt73 driver before kernel 2.6.24. Only I used the serialmonkey driver, http://rt2x00.serialmonkey.com/wiki/ind … =Downloads, not the ralink ones which the wiki points to.

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#6 2008-03-05 22:13:23

tomk
Forum Fellow
From: Ireland
Registered: 2004-07-21
Posts: 9,839

Re: SOLVED wlan0 not found by ifconfig

FYI, rt73 from serialmonkey works fine for me with kernel 2.6.24. I used the hourly cvs snapshot from that Downloads page.

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#7 2008-03-05 22:22:29

greenfuse
Member
Registered: 2008-02-14
Posts: 57

Re: SOLVED wlan0 not found by ifconfig

thanks tomk I will give that another try first

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#8 2008-03-05 22:57:08

greenfuse
Member
Registered: 2008-02-14
Posts: 57

Re: SOLVED wlan0 not found by ifconfig

Success. The latest serialmonkey driver works. Thanks to all for your input.

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