This question already has an answer here:
Why is my wifi disconecting randomly?
Here is the output of:
lspci -vnn | grep Network :
09:00.0 Network controller : Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723] (rev ff) (prog-if ff)
lo no wireless extensions.
wlp9s0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off Power Management:off
enp8s0 no wireless extensions.
0: ideapad_wlan: Wireless LAN Soft blocked: no Hard blocked: no 1: ideapad_bluetooth: Bluetooth Soft blocked: no Hard blocked: no 2: hci0: Bluetooth Soft blocked: no Hard blocked: no