ubuntu16.04 无法wifi链接一段时间掉线且无法再连接

ubuntu16.04 无法wifi链接一段时间掉线且无法再连接，从网上搜索的确认这个一个bug。

解决方法：

1.Get details of your PCI wireless card by running

sudo lshw -class network

显示信息如下：

*-network
description: Wireless interface
product: RTL8723BE PCIe Wireless Network Adapter
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 00
serial: b0:c0:90:5c:1c:d5
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rtl8723be driverversion=4.4.0-21-generic firmware=N/A ip=192.168.0.8 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
resources: irq:16 ioport:d000(size=256) memory:df200000-df203fff

2.Get your card model info according to the product line. For instance, as you can see in the question description it says

product: RTL8723BE PCIe Wireless Network Adapter

so the model of my card is

RTL8723BE

3.Open or create

/etc/pm/config.d/config

and add

SUSPEND_MODULES="rtl8723be"

(replace rtl8723be with your own model number) Then run

echo "options rtl8723be fwlps=N" | sudo tee /etc/modprobe.d/rtl8723be.conf

and reboot.

命令行为：

sudo vim /etc/pm/config.d/config

然后输入：SUSPEND_MODULES="rtl8723be" （注意rtl8723be要用你自己的number替换）

然后保存并退出文件

在终端中输入：

echo "options rtl8723be fwlps=N" | sudo tee /etc/modprobe.d/rtl8723be.conf

然后 输入 reboot 重启即可

解决方法参看：
http://askubuntu.com/questions/762198/16-04-lts-wifi-connection-issues