我对这篇文章有非常类似的问题：
但我无法在那里发表评论，这就是我提出新问题的原因。
我有一台双启动 Windows 8/Ubuntu 14 的笔记本电脑。我的 wifi 互联网在 Windows 上运行良好，但在 Ubuntu 下非常慢且不稳定：连接每隔 5 分钟左右就会断开一次。
我尝试了很多不同的解决方案（包括将内核升级到 3.17.1）。我还尝试了上述链接中 Chili555 提出的解决方案（但将“rtl8188ee”改为“rtl8723be”），但似乎没有任何效果。
以下是有关我的笔记本的一些信息
$sudo lshw -C network
*-network
descrição: Ethernet interface
produto: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
fabricante: Realtek Semiconductor Co., Ltd.
ID físico: 0
informações do barramento: pci@0000:08:00.0
nome lógico: eth0
versão: 07
serial: 34:64:a9:75:ff:7a
tamanho: 10Mbit/s
capacidade: 100Mbit/s
largura: 64 bits
clock: 33MHz
capacidades: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuração: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8106e-1_0.0.1 06/29/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
recursos: irq:41 porta de E/S:5000(tamanho=256) memória:b5600000-b5600fff memória:b5400000-b5403fff
*-network
descrição: Interface sem fio
produto: RTL8723BE PCIe Wireless Network Adapter
fabricante: Realtek Semiconductor Co., Ltd.
ID físico: 0
informações do barramento: pci@0000:0a:00.0
nome lógico: wlan0
versão: 00
serial: 10:08:b1:3b:3d:11
largura: 64 bits
clock: 33MHz
capacidades: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuração: broadcast=yes driver=rtl8723be driverversion=3.17.1-031701-generic firmware=N/A ip=10.110.80.14 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
recursos: irq:46 porta de E/S:3000(tamanho=256) memória:b5500000-b5503fff
$ifconfig -a
eth0 Link encap:Ethernet Endereço de HW 34:64:a9:75:ff:7a
UP BROADCAST MULTICAST MTU:1500 Métrica:1
pacotes RX:0 erros:0 descartados:0 excesso:0 quadro:0
Pacotes TX:0 erros:0 descartados:0 excesso:0 portadora:0
colisões:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Loopback Local
inet end.: 127.0.0.1 Masc:255.0.0.0
endereço inet6: ::1/128 Escopo:Máquina
UP LOOPBACK RUNNING MTU:65536 Métrica:1
pacotes RX:156 erros:0 descartados:0 excesso:0 quadro:0
Pacotes TX:156 erros:0 descartados:0 excesso:0 portadora:0
colisões:0 txqueuelen:0
RX bytes:11241 (11.2 KB) TX bytes:11241 (11.2 KB)
wlan0 Link encap:Ethernet Endereço de HW 10:08:b1:3b:3d:11
inet end.: 10.110.80.14 Bcast:10.110.255.255 Masc:255.255.0.0
endereço inet6: fe80::1208:b1ff:fe3b:3d11/64 Escopo:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Métrica:1
pacotes RX:19710 erros:0 descartados:0 excesso:0 quadro:0
Pacotes TX:1455 erros:0 descartados:0 excesso:0 portadora:0
colisões:0 txqueuelen:1000
RX bytes:2757117 (2.7 MB) TX bytes:218735 (218.7 KB)
$nm-tool
State: connecting
- Device: wlan0 [SmartCampus] -------------------------------------------------
Type: 802.11 WiFi
Driver: rtl8723be
State: connecting (configuring)
Default: no
HW Address: 10:08:B1:3B:3D:11
Capabilities:
Wireless Properties
WEP Encryption: yes
WPA Encryption: yes
WPA2 Encryption: yes
Wireless Access Points
Tatane: Infra, 00:26:F2:52:53:D7, Freq 2462 MHz, Rate 54 Mb/s, Strength 30 WPA WPA2
JH cherche JF plutot canon: Infra, 88:9F:FA:0F:E7:35, Freq 2462 MHz, Rate 54 Mb/s, Strength 40 WEP
NUMERICABLE-6B42:Infra, 24:EC:99:FF:A8:CB, Freq 2452 MHz, Rate 54 Mb/s, Strength 40 WPA WPA2
SmartCampus: Infra, E0:1C:41:AB:80:54, Freq 2437 MHz, Rate 54 Mb/s, Strength 35
NUMERICABLE-1AB1:Infra, 00:1A:2B:9B:1F:01, Freq 2462 MHz, Rate 54 Mb/s, Strength 37 WPA WPA2
Livebox-1E06: Infra, 40:F2:01:5E:1E:06, Freq 2462 MHz, Rate 54 Mb/s, Strength 34 WPA WPA2
NUMERICABLE-CAAC:Infra, 00:1A:2B:6C:B1:DC, Freq 2462 MHz, Rate 54 Mb/s, Strength 44 WEP
FreeWifi: Infra, 14:0C:76:70:C5:82, Freq 2462 MHz, Rate 54 Mb/s, Strength 57
SFR WiFi FON: Infra, AA:17:33:E0:E7:91, Freq 2462 MHz, Rate 54 Mb/s, Strength 74
SmartCampus: Infra, E0:1C:41:AB:7F:94, Freq 2462 MHz, Rate 54 Mb/s, Strength 100
- Device: eth0 -----------------------------------------------------------------
Type: Wired
Driver: r8169
State: unavailable
Default: no
HW Address: 34:64:A9:75:FF:7A
Capabilities:
Carrier Detect: yes
Wired Properties
Carrier: off
答案1
最重要的是，如果您的 wifi 不断断开连接，则问题出在 Ubuntu 内核，您需要做两件事：
-
下载 .deb 包：
对于 32 位系统：
$ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17.3-vivid/linux-headers-3.17.3-031703_3.17.3-031703.201411141335_all.deb $ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17.3-vivid/linux-headers-3.17.3-031703-generic_3.17.3-031703.201411141335_i386.deb $ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17.3-vivid/linux-image-3.17.3-031703-generic_3.17.3-031703.201411141335_i386.deb对于 64 位系统：
$ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17.3-vivid/linux-headers-3.17.3-031703_3.17.3-031703.201411141335_all.deb $ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17.3-vivid/linux-headers-3.17.3-031703-generic_3.17.3-031703.201411141335_amd64.deb $ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17.3-vivid/linux-image-3.17.3-031703-generic_3.17.3-031703.201411141335_amd64.deb
安装并重启：
$ sudo dpkg -i linux-headers-3.17.3*.deb linux-image-3.17.3*.deb; sudo reboot 下载最新rtl8723be驱动程序
GitHub 上有此驱动程序的新版本。
您需要安装包含内核头文件的软件包。
git clone http://github.com/lwfinger/rtlwifi_new.git
cd rtlwifi_new
make
sudo make install
该版本的驱动程序将提交并纳入内核 3.18。
答案2
请打开终端并执行：
echo "options rtl8723be fwlps=N ips=N" | sudo tee /etc/modprobe.d/rtl8723be.conf
重新启动并告诉我们无线是否正常工作。
如果出现进一步的问题，请按照此处所述运行无线脚本：我的无线/WiFi 连接无法使用。诊断问题需要哪些信息？由于输出很长，请将结果粘贴到这里并在您的回复中给我们链接：http://paste.ubuntu.com