обнаруживает весь Wi-Fi кроме моего собственного

у меня есть lenovo ideapad G480 и человечность 14.04.02. мой ноутбук обнаруживает любой Wi-Fi, но не мое собственное. я также проверил соединение, и оно работает над любым устройством. мог любой помогать мне решить это.Спасибо

вот некоторая информация, которая может помочь.

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.2 LTS"
Linux umar-Lenovo-G480 3.16.0-41-generic #55~14.04.1-Ubuntu SMP Sun Jun 14 18:43:36 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
umar@umar-Lenovo-G480:~$ lspci -nnk | grep -iA2 net
02:00.0 Ethernet controller [0200]: Qualcomm Atheros AR8162 Fast Ethernet [1969:1090] (rev 08)
    Subsystem: Lenovo Device [17aa:3979]
    Kernel driver in use: alx
03:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)
    Subsystem: Broadcom Corporation Device [14e4:0587]
    Kernel driver in use: bcma-pci-bridge
umar@umar-Lenovo-G480:~$ iwconfig
eth0      no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:off/any

          Mode:Managed  Access Point: Not-Associated   Tx-Power=27 dBm

          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

lo        no wireless extensions.

umar@umar-Lenovo-G480:~$ rfkill list all
0: ideapad_wlan: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: ideapad_bluetooth: Bluetooth
    Soft blocked: no
    Hard blocked: no

*-network

       description: Ethernet interface
       product: AR8162 Fast Ethernet
       vendor: Qualcomm Atheros
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eth0
       version: 08
       serial: b8:88:e3:76:bd:2d
       size: 100Mbit/s
       capacity: 100Mbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=alx duplex=full ip=192.168.0.102 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
       resources: irq:46 memory:db500000-db53ffff ioport:2000(size=128)
  *-network
       description: Network controller
       product: BCM4313 802.11bgn Wireless Network Adapter
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       version: 01
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: driver=bcma-pci-bridge latency=0
       resources: irq:17 memory:db400000-db403fff
  *-network
       description: Wireless interface
       physical id: 3
       logical name: wlan0
       serial: 08:ed:b9:a4:43:97
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=brcmsmac driverversion=3.16.0-41-generic firmware=610.812 link=no multicast=yes wireless=IEEE 802.11bgn

lspci -knn | grep Net -A2
03:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)
    Subsystem: Broadcom Corporation Device [14e4:0587]
    Kernel driver in use: wl