Execute os comandos abaixo.
uname -a
sudo modprobe -v iwlagn
dmesg | tail -20
uname -aLinux Doverson-Vostro 2.6.32-38-generic #83-Ubuntu SMP Wed Jan 4 11:12:07 UTC 2012 x86_64 GNU/Linux
sudo modprobe -v iwlagninsmod /lib/modules/2.6.32-38-generic/kernel/net/wireless/cfg80211.ko
insmod /lib/modules/2.6.32-38-generic/kernel/drivers/leds/led-class.ko
insmod /lib/modules/2.6.32-38-generic/kernel/net/mac80211/mac80211.ko
insmod /lib/modules/2.6.32-38-generic/kernel/drivers/net/wireless/iwlwifi/iwlcore.ko
insmod /lib/modules/2.6.32-38-generic/kernel/drivers/net/wireless/iwlwifi/iwlagn.ko
dmesg | tail -20[ 19.933887] CPU2 attaching sched-domain:
[ 19.933888] domain 0: span 0,2 level SIBLING
[ 19.933889] groups: 2 (cpu_power = 589) 0 (cpu_power = 589)
[ 19.933892] domain 1: span 0-3 level MC
[ 19.933893] groups: 0,2 (cpu_power = 1178) 1,3 (cpu_power = 1178)
[ 19.933897] CPU3 attaching sched-domain:
[ 19.933898] domain 0: span 1,3 level SIBLING
[ 19.933899] groups: 3 (cpu_power = 589) 1 (cpu_power = 589)
[ 19.933902] domain 1: span 0-3 level MC
[ 19.933903] groups: 1,3 (cpu_power = 1178) 0,2 (cpu_power = 1178)
[ 71.575485] cfg80211: Calling CRDA to update world regulatory domain
[ 71.674937] cfg80211: World regulatory domain updated:
[ 71.674939] (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 71.674941] (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 71.674943] (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 71.674944] (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 71.674946] (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 71.674947] (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 71.700338] iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux, 1.3.27k
[ 71.700340] iwlagn: Copyright(c) 2003-2009 Intel Corporation