сравнил версию используемого модуля ядра и фирмварь - в системе используется та-же версия.
-rw-r--r-- 1 root root 150100 нояб. 24 2014 iwlwifi-3945-2.ucode
:~$ modinfo iwl3945
filename: /lib/modules/3.19.0-51-generic/kernel/drivers/net/wireless/iwlegacy/iwl3945.ko
firmware: iwlwifi-3945-2.ucode
license: GPL
author: Copyright(c) 2003-2011 Intel Corporation <ilw@linux.intel.com>
version: in-tree:s
description: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux
srcversion: 38AF47414DCF3CBFB173CB3
alias: pci:v00008086d00004227sv*sd*bc*sc*i*
alias: pci:v00008086d00004222sv*sd*bc*sc*i*
alias: pci:v00008086d00004227sv*sd00001014bc*sc*i*
alias: pci:v00008086d00004222sv*sd00001044bc*sc*i*
alias: pci:v00008086d00004222sv*sd00001034bc*sc*i*
alias: pci:v00008086d00004222sv*sd00001005bc*sc*i*
depends: iwlegacy,cfg80211,mac80211
intree: Y
vermagic: 3.19.0-51-generic SMP mod_unload modversions 686
signer: Magrathea: Glacier signing key
sig_key: 12:53:B2:84:08:A7:A0:5F:A1:5C:BA:EA:4F:FC:11:04:21:97:3F:64
sig_hashalgo: sha512
parm: antenna:select antenna (1=Main, 2=Aux, default 0 [both]) (int)
parm: swcrypto:using software crypto (defaumodinfo iwl3945
filename: /lib/modules/3.19.0-51-generic/kernel/drivers/net/wireless/iwlegacy/iwl3945.ko
firmware: iwlwifi-3945-2.ucode
license: GPL
author: Copyright(c) 2003-2011 Intel Corporation <ilw@linux.intel.com>
version: in-tree:s
description: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux
srcversion: 38AF47414DCF3CBFB173CB3
alias: pci:v00008086d00004227sv*sd*bc*sc*i*
alias: pci:v00008086d00004222sv*sd*bc*sc*i*
alias: pci:v00008086d00004227sv*sd00001014bc*sc*i*
alias: pci:v00008086d00004222sv*sd00001044bc*sc*i*
alias: pci:v00008086d00004222sv*sd00001034bc*sc*i*
alias: pci:v00008086d00004222sv*sd00001005bc*sc*i*
depends: iwlegacy,cfg80211,mac80211
intree: Y
vermagic: 3.19.0-51-generic SMP mod_unload modversions 686
signer: Magrathea: Glacier signing key
sig_key: 12:53:B2:84:08:A7:A0:5F:A1:5C:BA:EA:4F:FC:11:04:21:97:3F:64
sig_hashalgo: sha512
parm: antenna:select antenna (1=Main, 2=Aux, default 0 [both]) (int)
parm: swcrypto:using software crypto (default 1 [software]) (int)
parm: disable_hw_scan:disable hardware scanning (default 1) (int)
parm: fw_restart:restart firmware in case of error (int)
lt 1 [software]) (int)
parm: disable_hw_scan:disable hardware scanning (default 1) (int)
parm: fw_restart:restart firmware in case of error (int)