I had the dmesg message that I needed use iwllwifi-3945-2 instead iwlwifi-3945-1. I finded the packege firmware-iwlwifi-0.23~bpo50+1 and installed that instead 0.14+lenny2. Now I have the next records in dmesg: [ 49.170257] iwl3945 0000:02:00.0: firmware: requesting iwlwifi-3945-2.ucode [ 49.272362] iwl3945 0000:02:00.0: loaded firmware version 15.32.2.9 Is it wrong?!