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Recently I installed Ubuntu 18.04. Unfortunately my WiFi adapter is not working properly. it couldn't detect the low range WiFi signals.

Output of lshw -C network

*-network
       description: Wireless interface
       product: RTL8723BE PCIe Wireless Network Adapter
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlo1
       version: 00
       serial: 74:df:bf:81:e7:a7
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=rtl8723be driverversion=4.15.0-32-generic firmware=N/A ip=192.168.43.81 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:17 ioport:3000(size=256) memory:b1100000-b1103fff

marked as duplicate by pomsky, karel, Thomas, waltinator, Zanna Aug 27 '18 at 7:36

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  • sudo apt-get install --reinstall network-manager (can help, not sure ... ) – dschinn1001 Aug 24 '18 at 13:41
  • Please edit your question and include the output of lshw -C network. – Kulfy Aug 24 '18 at 14:05
  • Is it an external wifi adapter? If yes, can you give us the type of your adapter? – damadam Aug 24 '18 at 14:20
  • no, its inbuilt one @damadam – Bala Kumar Aug 24 '18 at 17:03
  • That's a known issue with Realtek 8723. Try this. It helped me to get the WiFi to work flawlessly on two of my friends' laptop. – Kulfy Aug 24 '18 at 18:21