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 (screenshot: http://i.imgur.com/bwnll5l.png).
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. Thank you.