ubuntu16.04 can not connect the WiFi link for a period of time and can not be connected, from the online search confirmation of this one bug.
Workaround:
1.Get details of your PCI wireless card by runningsudo lshw -class network
The following information is displayed:
*-network description: Wireless interface RTL8723BE PCIe Wireless Network Adapter vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: [email protected]: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 can see in the question description it says so the product: RTL8723BE PCIe Wireless Network Adapter
model of my card isRTL8723BE
3.Open or Create and /etc/pm/config.d/config
add SUSPEND_MODULES="rtl8723be"
(replace RTL8723BE with your own model number) then run and echo "options rtl8723be fwlps=N" | sudo tee /etc/modprobe.d/rtl8723be.conf
reboot.
Command behavior:
sudo vim/etc/pm/config.d/config
Then enter: suspend_modules= "Rtl8723be" (note rtl8723be to replace with your own number)
Then save and exit the file
In the terminal, enter:echo "options rtl8723be fwlps=N" | sudo tee /etc/modprobe.d/rtl8723be.conf
Then enter reboot to restart
Workaround See:
Http://askubuntu.com/questions/762198/16-04-lts-wifi-connection-issues
ubuntu16.04 cannot connect for a period of time without a WiFi link