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 [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723] (rev ff) (prog-if ff)

iwconfig :

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.

rfkill list:

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

marked as duplicate by David Foerster, karel, Pilot6, Eric Carvalho, Zanna Dec 4 '16 at 19:30

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • 1
    You should edit your question to include a question for which you are looking for an answer to. – Phil UK Dec 4 '16 at 3:23
  • Run rfkill list and properly edit your post with the output – M. Becerra Dec 4 '16 at 12:11