Two usb wifi adapaters, only wlan0 appears, how to get wlan1?

Question

I have web-service function, which I'm importing for my project. The thing is that, I have method, which returns Array of (let's say) FirstClass. This itself contains field type of SecondClass (Members: Name, Value) I have DataGridView with This Array DataSource. The thing is that, This MyDataGridView.DataSource = Array displays all field values excapt field type of SecondClass. (displayed Namespace.Class not the Value field) what can i make to make Value field of SecondClass show.

Solution

It appears that the device I'm using doesn't like the two wifi dongles connected in the order that I had them connected. Reversing the order in which they are connected resulted in both wifi dongles being recognised (as seen via lsusb) and then consequently configurable via /etc/network/interfaces, after which they could be brought up via ifup wlan1.

The final entries in /etc/network/interfaces that worked was:

auto lo

iface lo inet loopback
iface eth0 inet dhcp

auto wlan0
iface wlan0 inet dhcp
    wpa-conf /etc/wpa.config

auto wlan1
iface wlan1 inet dhcp
    wireless-essid ardrone_3

and the results with ifconfig are:

eth0  Link encap:Ethernet  HWaddr b8:27:eb:e8:9f:ac  
      inet addr:192.168.1.132  Bcast:192.168.1.255  Mask:255.255.255.0
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:5111 errors:0 dropped:0 overruns:0 frame:0
      TX packets:3001 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:431610 (421.4 KiB)  TX bytes:552794 (539.8 KiB)

lo    Link encap:Local Loopback  
      inet addr:127.0.0.1  Mask:255.0.0.0
      UP LOOPBACK RUNNING  MTU:16436  Metric:1
      RX packets:0 errors:0 dropped:0 overruns:0 frame:0
      TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0 
      RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

wlan0 Link encap:Ethernet  HWaddr 30:85:a9:6e:a6:bb  
      inet addr:192.168.1.117  Bcast:192.168.1.255  Mask:255.255.255.0
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:4743 errors:0 dropped:1 overruns:0 frame:0
      TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:1322366 (1.2 MiB)  TX bytes:1309 (1.2 KiB)

wlan1 Link encap:Ethernet  HWaddr 30:85:a9:6e:a6:c9  
      inet addr:192.168.1.3  Bcast:192.168.1.255  Mask:255.255.255.0
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:5 errors:0 dropped:0 overruns:0 frame:0
      TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:2420 (2.3 KiB)  TX bytes:1476 (1.4 KiB)

As can be seen, both wifi devices are working and have received ip addresses.

It appears that the problem was not a configuration issue of debian but an issue with the hardware that required the two devices to be swapped.

A big thank you to Gert van den Berg and user1129682 for their patience with me.

Comments

[Akram Shahda]

What is the real type of the SecondClass here ?

[V4Vendetta]

Are you using AutogenerateColumns=true ?

[Admin]

You need to provide better information. You only show us dmesg output of one wlan device being recognized, not two. Does /var/log/messages contain any information? which driver is used for the wlan devices?

[Admin]

lsusb says...?

[Admin]

@user1129682 I am not familar with the logs or with the commands like lsusb and dmesg sorry. I've modified my post to include extra info from /var/log/messages that looked appropriate to me. Is there a service where I can post the logs and show here? @IgnacioVazquez-Abrams I've added the lsusb, sorry forgot to add that the first time I posted.

[Admin]

just also check that manually running ifconfig wlan1 gives an error... ifconfig will not normally show interfaces that are down... ifconfig -a will show them though...

[Admin]

Has Gert pointed out, you need to put ifconfig -a not just ifconfig. Or you use ip link show.

[Admin]

@GertvandenBerg with the usb devices plugged in as originally done, ifconfig -a is same as ifconfig, however if I swap the usb devices around, it changes. Posted changes above. @user1129682 updated above. Btw guys, thanks for your help so far. I'm not familiar with this side of Linux and it looks like to me that there are some peculiarities with the hardware making it even more fun.

[gertvdijk]

@user1129682 Answers should be posted as answers. It doesn't matter if the OP answers his own questions, it is even encouraged to do so on this website. See the FAQ.

[Michael Mrozek]

Ignore user1129682; you're supposed to post an answer if you solve your own question. You can even accept it once the site will let you (you have to wait two days though)