Só por curiosidade, qual o chipset dele?
sudo lshw -C network
lsusb
lshw -C network
*-network
descrição: Interface sem fio
ID físico: 1
informações do barramento: usb@1:5
nome lógico: wlan5
serial: 00:1a:2f:9a:28:a2
capacidades: ethernet physical wireless
configuração: broadcast=yes driver=ath9k_htc driverversion=3.8.0-30-generic firmware=1.3 ip=192.168.1.4 link=yes multicast=yes wireless=IEEE 802.11bgn
lsusb
Bus 001 Device 005: ID 0cf3:9271 Atheros Communications, Inc. AR9271 802.11n
Bus 001 Device 004: ID 152e:1640 LG (HLDS)
Bus 003 Device 002: ID 045e:009d Microsoft Corp. Wireless Optical Desktop 3.0
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
