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I am new to Debian (previously using Ubuntu, which is also Debian based). When I installed it on my Lenovo G450 laptop, I skipped the wireless configuration (I really didn't know how to do that).

After the installation, I found no wireless network available.

I add

iface wlan0 inet dhcp

to /etc/network/interface, then typed

iwlist wlan0 scan

But the terminal told me that "interface not support for this operation".

Anyway I tried

iwconfig wlan0 essid xxx key xxx

and the terminal said: "invalid argument".

Can anyone help? I had to turn to Fedora/Ubuntu again. They have network-manager to configure the wireless network, but Debian does not. I wanted to install network-manager, but I can't connect to the internet.

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I fixed your formatting – please use the syntax and editor help if you're not sure. There's no need for <br>. — As for your question: Are you sure you added it to /etc/network/interfaces and not interface (notice the missing "s")? Have you done a /etc/init.d/networking restart after editing the interfaces? And "interface not support … " – are you sure this is the exact error message you get? –  slhck Oct 1 '11 at 9:05
    
Read the Debian manual: /etc/network/interfaces needs an iface, not ´interface` line where you put the wlan0. –  slhck Oct 2 '11 at 11:17
    
I think i found the reason, it does not have the wireless firmware of the old broadcom network device. –  jilen Oct 8 '11 at 0:24
    
Ah, I see. Well you could write an answer to your own question if you found out how to get it working! –  slhck Oct 8 '11 at 8:38

1 Answer 1

up vote 0 down vote accepted

That's just because the lack of the old broadcom wireless driver. i download b43 and compile it.

this link will help install b43 firmware

the new 3.x kernel seems have broadcom firmware built in

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Ah, the ol' download and compile vendor specific driver trick! If we can raise awareness about this technique, it'll be the year of Linux on the desktop in no time! –  ta.speot.is Oct 8 '11 at 10:06
    
very sorry! I add a link from the b43 project site. –  jilen Oct 8 '11 at 10:32

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