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I have upgraded my HP pavilion laptop from Windows 10 to Ubuntu 18.04. Initially it has issue with Wi-Fi connection. I had installed Wi-Fi realtek driver and it was working.

All of sudden it has stopped detecting my router Wi-Fi. When I move close to Wi-Fi router its working fine, but just within range of 1-2 meters. If I go far around 5 meters my Wi-Fi is not showing in available Wi-Fi list.

same Wi-Fi is working with my iPhone perfectly. I did try to connect my phone hotspot and its also working fine when phone is close to my laptop.

Is there any solution to fix this issue? or I just need to revert back to windows?

here is the output of lspci -knn | grep Net -A3; rfkill list

08:00.0 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

09:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [10ec:8136] (rev 0a)


0: hci0: Bluetooth

    Soft blocked: yes

    Hard blocked: no

1: phy0: Wireless LAN

    Soft blocked: no

    Hard blocked: no

Please let me know if need to update or downgrade my kernel.

pomsky
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Tejash Jethwa
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    What is result from terminal for lspci -nnk | grep -iA3 net If it is rtl8723be, try using a kernel older than -33 as 33 has a bug – Jeremy31 Sep 01 '18 at 14:14
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    Possible duplicate of Wifi networks not found ubuntu 18.04 with rtl8723be. It seems kernel v4.15.0-33 has a bug, boot using an older kernel. Alternatively, try this: https://askubuntu.com/questions/1068826/wifi-doesnt-work-on-ubuntu-18-04-1-lts – pomsky Sep 02 '18 at 21:55
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    @pomsky yes you are right there was issue with kernel V4.15.0-33, I have tried with -32 and its working fine. Thank you so much buddy fir your quick help and suggestion. Is there any way to set -32 as default boot kernel? – Tejash Jethwa Sep 03 '18 at 06:44
  • @TejashJethwa See this: https://askubuntu.com/questions/216398/set-older-kernel-as-default-grub-entry – pomsky Sep 03 '18 at 08:35

1 Answers1

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The bug is fixed with kernel 4.17.0-041700:

http://kernel.ubuntu.com/~jsalisbury/lp1788997

as long as you select antenna 1:

modprobe rtl8723be ant_sel=1
abu_bua
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Wolfie
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