我目前在笔记本电脑上安装了 Ubuntu 14.04 LTS。WiFi 连接毫无问题，但当我尝试访问互联网时却无法访问。使用无线 USB 切换连接时，它工作正常。内部无线模块无法正常工作
我该如何修复此问题？我的笔记本电脑是 Toshiba satellite A500
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:0e:00.0
logical name: eth0
version: 03
serial: 00:26:22:4a:8f:a0
size: 10Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl_nic/rtl8168d-1.fw latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:45 ioport:4000(size=256) memory:f2004000-f2004fff memory:f2000000-f2003fff memory:f2020000-f203ffff
description: Wireless interface
product: AR9285 Wireless Network Adapter (PCI-Express)
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:14:00.0
logical name: wlan0
version: 01
serial: 00:23:08:e9:ba:6a
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=3.13.0-24-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:19 memory:f6000000-f600ffff
description: Wireless interface
physical id: 2
bus info: usb@2:1
logical name: wlan1
serial: 74:ea:3a:8b:05:60
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=rt2800usb driverversion=3.13.0-24-generic firmware=0.29 ip=192.168.2.5 link=yes multicast=yes wireless=IEEE 802.11bgn