thinkpad E440 无法使用无线网卡

[q200862546]

装了个双系统，结果ubantu下的无线无法使用。

无线网卡在win7下是OK的，有线不管是win7还是ubantu都可以使用。

请问这是什么原因，有什么解决方法，

使用的系统是12.04LTS

[poloshiao]

把下面指令 複製 貼進終端機 執行
1. sudo lshw -numeric -class network
2. sudo ifconfig -a
3. sudo route -nv
4. sudo dhclient -v
把結果直接複製 貼上來

[q200862546]

junjieqian@junjieqian-ThinkPad-Edge-E440:~$ sudo lshw -numeric -class network
[sudo] password for junjieqian:
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10EC:8168]
vendor: Realtek Semiconductor Co., Ltd. [10EC]
physical id: 0
bus info: pci@0000:04:00.0
logical name: eth0
version: 10
serial: 28:d2:44:40:f0:fa
size: 100Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list 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=full firmware=rtl8168g-3_0.0.1 04/23/13 ip=192.168.1.103 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
resources: irq:44 ioport:4000(size=256) memory:f1d04000-f1d04fff memory:f1d00000-f1d03fff
*-network UNCLAIMED
description: Network controller
product: Realtek Semiconductor Co., Ltd. [10EC:B723]
vendor: Realtek Semiconductor Co., Ltd. [10EC]
physical id: 0
bus info: pci@0000:05:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: latency=0
resources: ioport:3000(size=256) memory:f1c00000-f1c03fff
junjieqian@junjieqian-ThinkPad-Edge-E440:~$ sudo ifconfig -a
eth0 Link encap:以太网 硬件地址 28:d2:44:40:f0:fa
inet 地址:192.168.1.103 广播:192.168.1.255 掩码:255.255.255.0
inet6 地址: fe80::2ad2:44ff:fe40:f0fa/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 跃点数:1
接收数据包:2328 错误:0 丢弃:0 过载:0 帧数:0
发送数据包:1965 错误:0 丢弃:0 过载:0 载波:0
碰撞:0 发送队列长度:1000
接收字节:2349951 (2.3 MB) 发送字节:252187 (252.1 KB)

lo Link encap:本地环回
inet 地址:127.0.0.1 掩码:255.0.0.0
inet6 地址: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 跃点数:1
接收数据包:260 错误:0 丢弃:0 过载:0 帧数:0
发送数据包:260 错误:0 丢弃:0 过载:0 载波:0
碰撞:0 发送队列长度:0
接收字节:41932 (41.9 KB) 发送字节:41932 (41.9 KB)

junjieqian@junjieqian-ThinkPad-Edge-E440:~$ sudo route -nv
内核 IP 路由表
目标 网关 子网掩码 标志 跃点 引用 使用 接口
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0
junjieqian@junjieqian-ThinkPad-Edge-E440:~$ sudo dhclient -v
Internet Systems Consortium DHCP Client 4.1-ESV-R4
Copyright 2004-2011 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/eth0/28:d2:44:40:f0:fa
Sending on LPF/eth0/28:d2:44:40:f0:fa
Sending on Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
DHCPREQUEST of 192.168.1.103 on eth0 to 255.255.255.255 port 67
DHCPOFFER of 192.168.1.103 from 192.168.1.1
DHCPACK of 192.168.1.103 from 192.168.1.1
RTNETLINK answers: File exists
bound to 192.168.1.103 -- renewal in 3015 seconds.
junjieqian@junjieqian-ThinkPad-Edge-E440:~$ ^C
junjieqian@junjieqian-ThinkPad-Edge-E440:~$

[poloshiao]

viewtopic.php?p=3089678#p3089678
product: Realtek Semiconductor Co., Ltd. [10EC:B723]
configuration: latency=0

http://www.pcidatabase.com/vendor_details.php?id=1697
0xB723
Chip Number: unkown
Chip Description: Realtek RTL8723BE Wireless LAN 802.11n PCI-NIC #4

參閱
viewtopic.php?f=116&t=453531&hilit=RTL8723BE
viewtopic.php?f=116&t=460628&hilit=RTL8723BE