I have hp 15-ac122tu laptop. I've installed Ubuntu 18.04 in dual boot but it is not showing any wifi which is not within a 2 meter range. It has realtek driver RTL8723BE in it.
$ lspci -knn | grep -i net -A3
Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe
Wireless Network Adapter [10ec:b723] Subsystem: Hewlett-Packard Company RTL8723BE PCIe Wireless Network Adapter [103c:804c]
Kernel driver in use: rtl8723be
Kernel modules: rtl8723be
In Windows it is showing all networks and connecting as well
In Ubuntu it connects only if the laptop is very close to the router.
I have tried this: Realtek RTL8723BE Wi-Fi incredibly weak but unfortunately it isn't working
lspci -knn | grep -i net -A3, post as plain text. – abu_bua Sep 05 '18 at 15:01