My wireless internet is very unreliable, so I usually have to connect to the internet using a cable, but this is very inconvenient.
I tried doing the solution for what seems like a similar problem here, but it still does not fix the issue:
16.04 LTS wifi connection issues with Realtek RTL8723BE adapter ... That is, I created /etc/pm/config.d/config
and added SUSPEND_MODULES="rtl8821ae"
$ lspci -knn | grep Net -A2
03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821AE 802.11ac PCIe Wireless Network Adapter [10ec:8821]
Subsystem: XAVi Technologies Corp. RTL8821AE 802.11ac PCIe Wireless Network Adapter [1b9a:2482]
Kernel driver in use: rtl8821ae
Kernel modules: rtl8821ae
lspci -knn | grep Net -A2
. – Feb 15 '17 at 22:36