View Full Version : [ubuntu] Wireless Stoped working, no interface found

May 14th, 2008, 09:30 AM
so, I had problems with my wifi card to begin with, but ndiswrapper seemed to solve all of that, but the other day, my wireless card seemed to just through a tantrum and leave

I go to the networkmanager, and try to type in my connection (wlan0) and hit configre, it returns

the interface does not exist, check that it is typed correctly and it is supproted by your system

sudo ndiswrapper -l gives

net5211 : driver installed
device (168C:001C) present (alternate driver: ath5k)

so the card is being seen by ndiswrapper

iwconfig gives

lo no wireless extensions.

eth0 no wireless extensions.

wlan0 IEEE 802.11g ESSID:off/any
Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
Bit Rate:54 Mb/s
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

so i know that the card is being seen

iwlist wlan0 scan returns all the access points around me, so I know that its receiving signals

i try sudo iwconfig wlan essid (the ssid) key (the key) and..

Error for wireless request "Set Encode" (8B2A) :
SET failed on device wlan0 ; Invalid argument.

any help would be greatly appreciated

May 14th, 2008, 03:09 PM
"Set Encode" (8B2A) :This is Linux-speak for 'I don't like your key, young grasshopper.' Is this a WEP key? Is it Hex or ASCII? If it's ASCII, is it 5 or 13 characters and prepended with s:? If it's Hex, is it 10 or 26 characters?

Valid key lengths are 5 (ASCII) and 10 (Hex) for 64-bit, 13 (ASCII) and 26 (Hex) for 128-bit WEP encryption.

May 14th, 2008, 08:01 PM
I believe its hex, its a 64 digit key though,
wpa tkip

May 14th, 2008, 10:23 PM
The command sudo iwconfig wlan0 key <ur_key> is for WEP, not WPA. To configure WPA the manual method, please see: http://ubuntuforums.org/showthread.php?t=318539

May 15th, 2008, 04:38 AM

thanks mate