Before going into the problem I'd like to state that before this incident I had Debian with GNOME instead of KDE.  I formatted to KDE today and now I am unable to get wireless to work.  On the system tray icon it says that the WLAN Interface is Unmanaged:

WLAN Interface

Type: Wireless 802.11
Connection State: Unmanaged
IP Address: No IP address.
Connection Speed: Unknown
System Name: wlan0
MAC Address: 00:18:DE:94:6A:05
Driver: iwl3945

    [Manually transcribed from this screenshot image.]

My wireless card is this:

# dmesg | grep Wireless
[    7.918101] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, in-tree:s
[    7.980252] iwl3945 0000:0c:00.0: Detected Intel Wireless WiFi Link 3945ABG

My /etc/network/interfaces file is this:

# The loopback network interface
auto lo
iface lo inet loopback

auto wlan0
iface wlan0 inet dhcp

I tried adding wpa-ssid and wpa-psk under the iface wlan0 but it didn't work.  I also installed firmware-linux-free.

firmware-linux-free is already the newest version.

I would appreciate any help; I am lost over here.

1 Answer 1


Your wireless card is supported in the iwlegacy driver which is in the non free repo

  1. Add a "non-free" component to /etc/apt/sources.list, for example:

    deb http://http.debian.net/debian/ wheezy main contrib non-free
  2. Update the list of available packages and install the firmware-iwlwifi package:

    $ sudo apt-get update && apt-get install firmware-iwlwifi
  3. As the iwlegacy driver is automatically loaded for supported devices, reinsert driver modules to access installed firmware:

    $ sudo modprobe -r iwl3945
    $ sudo modprobe iwl3945

Source: https://wiki.debian.org/iwlegacy


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