Ubuntu 13.10 上没有 wifi 连接

Question

我有一台新的笔记本电脑 lenovo thinkpad edge e540，我在上面安装了 ubuntu 13.10，但现在我无法通过 wifi 连接到互联网。ubuntu 似乎无法使用我的 wifi 卡，系统设置中根本没有管理无线连接的选项。有线连接工作。有谁能够帮助我？

以下是有关硬件的更多信息：

* uname -a *

Linux ThinkPad 3.11.0-14-generic #21-Ubuntu SMP Tue Nov 12 17:04:55 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

* lsb_release *

Distributor ID: Ubuntu
Description:    Ubuntu 13.10
Release:    13.10
Codename:   saucy

* lspci *

04:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 10)
Subsystem: Lenovo Device [17aa:5028]
Kernel driver in use: r8169
05:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:b723]
Subsystem: Lenovo Device [17aa:b728]

* lsusb *

Bus 002 Device 002: ID 8087:8000 Intel Corp. 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:8008 Intel Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 0bda:b728 Realtek Semiconductor Corp. 
Bus 003 Device 004: ID 04f2:b398 Chicony Electronics Co., Ltd 
Bus 003 Device 003: ID 138a:0011 Validity Sensors, Inc. VFS5011 Fingerprint Reader
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

* iwconfig *

* rfkill *

0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: no
Hard blocked: no

*纳米工具*

NetworkManager Tool

State: connected (global)

- Device: eth0  [Wired connection 1] -------------------------------------------
  Type:              Wired
  Driver:            r8169
  State:             connected
  Default:           yes
  HW Address:        <MAC address removed>

  Capabilities:
    Carrier Detect:  yes
    Speed:           100 Mb/s

  Wired Properties
    Carrier:         on

  IPv4 Settings:
    Address:         147.231.103.183
    Prefix:          22 (255.255.252.0)
    Gateway:         147.231.100.31

    DNS:             147.231.100.1
    DNS:             195.113.144.233

* NetworkManager.state *

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true

* NetworkManager.conf *

[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq

[ifupdown]
managed=false

* 接口*

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

* 解析.conf *

nameserver 127.0.1.1
search ujf.cas.cz

* 黑名单*

[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci

[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac

* udev 规则*

# PCI device 0x10ec:0x8168 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC address removed>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

Answer 1

我建议您构建并尝试第二个链接中提到的驱动程序。使用临时有线以太网连接，请打开终端并执行以下操作：

sudo apt-get install linux-headers-generic build-essential git
git clone http://github.com/lwfinger/rtl8723be
cd rtl8723be
make
sudo make install
sudo modprobe rtl8723be

这是我遇到的第一个这些设备，所以我们可能需要稍微调整一下。

断开以太网。它现在工作了吗？

当安装了较新的内核版本（称为 linux-image）时，重新启动后，您需要重新编译驱动程序：

cd ~/rtl8723be
make clean
make
sudo make install
sudo modprobe rtl8723be

届时请保留文件和这些说明。