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I just installed Lubuntu 14.04 on a Thinkpad T42 (with forcepae option). Everything is working fine but wifi. The applet shows only a few of the nearby networks. If my home network shows, it asks for the key, but then does nothing. Security is set to WPA as the card cannot handle WPA2. What bothers me is that iwconfig shows two identical wireless cards, one as eth0 and one as wifi0.

iwconfig output is:

wifi0 IEEE 802.11-DS ESSID:""

     Mode:Managed  Frequency:2.412 GHz  Access Point: Invalid   
      Bit Rate:11 Mb/s   Tx-Power=17 dBm   Sensitivity=0/65535  
      Retry limit:16   RTS thr:off   Fragment thr:off
      Power Management:off
      Link Quality=0/100  Signal level=-108 dBm  Noise level=-108 dBm
      Rx invalid nwid:10245  Rx invalid crypt:0  Rx invalid frag:0
      Tx excessive retries:0  Invalid misc:84223   Missed beacon:0

eth1 IEEE 802.11-DS ESSID:""

     Mode:Managed  Frequency:2.412 GHz  Access Point: Invalid   
      Bit Rate:11 Mb/s   Tx-Power=17 dBm   Sensitivity=0/65535  
      Retry limit:16   RTS thr:off   Fragment thr:off
      Power Management:off
      Link Quality=0/100  Signal level=-108 dBm  Noise level=-108 dBm
      Rx invalid nwid:10245  Rx invalid crypt:0  Rx invalid frag:0
      Tx excessive retries:0  Invalid misc:84223   Missed beacon:0

output of lshw -C Network is

*-network:0

  Beschreibung: Ethernet interface
   Produkt: 82540EP Gigabit Ethernet Controller (Mobile)
   Hersteller: Intel Corporation
   Physische ID: 1
   Bus-Informationen: pci@0000:02:01.0
   Logischer Name: eth0
   Version: 03
   Seriennummer: 00:0d:60:79:16:16
   Größe: 100Mbit/s
   Kapazität: 1Gbit/s
   Breite: 32 bits
   Takt: 66MHz
   Fähigkeiten: pm bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
   Konfiguration: autonegotiation=on broadcast=yes driver=e1000 driverversion=7.3.21-k8-NAPI duplex=full ip=192.168.2.102 latency=64 link=yes mingnt=255 multicast=yes port=twisted pair speed=100Mbit/s
   Ressourcen: irq:11 memory:c0220000-c023ffff memory:c0200000-c020ffff ioport:8400(Größe=64) memory:c0240000-c024ffff

*-network:1

  Beschreibung: Kabellose Verbindung
   Produkt: Cisco Aironet Wireless 802.11b
   Hersteller: Cisco Aironet Wireless Communications
   Physische ID: 2
   Bus-Informationen: pci@0000:02:02.0
   Logischer Name: wifi0
   Version: 00
   Seriennummer: 00:0e:9b:40:db:2c
   Breite: 32 bits
   Takt: 33MHz
   Fähigkeiten: pm vpd bus_master cap_list rom logical wireless ethernet physical
   Konfiguration: broadcast=yes driver=airo latency=64 maxlatency=4 mingnt=4 multicast=yes wireless=IEEE 802.11-DS
   Ressourcen: irq:11 ioport:8000(Größe=256) memory:c0214000-c0217fff memory:c0400000-c07fffff memory:c0800000-c09fffff

Note that the logical name here is wifi0 while the network manager shows eth1. Interestingly, I can scan with iwlist on both of them and see, at least some, nearby networks. I remember that getting drivers for this card in XP was very painful, but it seems to be properly recognized here. Using ifconfig, however shows only errors and that is on eth1

So, any ideas what is happening here?

  • What does this tell us? sudo iwlist eth1 auth Thanks! – chili555 Apr 22 '14 at 0:40
  • That gives eth1 unknown authentication information. Same on wifi0 – mikuszefski Apr 22 '14 at 12:26
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    My suspicion is that the old Aironet not only doesn't do WPA2 but, at least in Linux, doesn't do WPA at all. When you scan, does it report any WPA networks? – chili555 Apr 22 '14 at 13:01
  • Yes, with sudo iwlist eth1 scan I see WPA and WPA2 networks. – mikuszefski Apr 22 '14 at 14:09
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    @mikuszefski You can get T42 wifi cards (pulled from broken T42s) for about $5 on ebay. The Atheros abg card with open source madwifi driver works great (tested on Ubuntu 12.04 and Debian Wheezy). – bain May 8 '14 at 22:09

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