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I have an HP laptop. WiFi is not working in the recent update for Ubuntu 18.04.04. The Realtek rtl8732be adapter is not connecting and giving an error when I 'sudo modprobe' them.

Here is the error:

FATAL: Module rtl8732be not found in directory /lib/modules/5.3.0-51-generic

Or, when I try to reinstall them:

rmmod: ERROR: Module rtl8723de is not currently loaded

I followed this link as it started the WiFi for me - How To Resolve Wifi Driver Problem on Ubuntu 20.04

But when my laptop goes to sleep then WiFi doesn't begin to work and gives constant Activation of network error. This problem didn't happen for ethernet as I didn't have any problem for it. Have looked up multiple askubuntu pages and couldn't find any solution.

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1 Answer 1

Reset to default
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Try also the next solution taken from here:

sudo apt install git build-essential dkms
git clone -b extended https://github.com/lwfinger/rtw88.git
sudo dkms add ./rtw88
sudo dkms install rtw88/0.6
sudo modprobe -r rtl8723de && sudo modprobe rtl8723de

And Wifi works after reboot without doing any configuration, at least in my case in Ubuntu 19.04.

If not, try command to write it into configuration file (replace 3 to 1, 2 or 4 if signal is weak).

echo "options rtl8723de ant_sel=3" | sudo tee /etc/modprobe.d/rtl8723de.conf
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  • 1
    Please check: modinfo rtl8723de I believe that the only available selections for ant_sel are 0, 1 or 2.
    – chili555
    May 5, 2020 at 14:20
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    Wifi started for me through the link I mentioned but stopped working if my laptop got in suspend/sleep mode. To overcome I needed to restart my laptop each and every time. I tried this solution and got error that rtl8723de was still in use. I restarted and ran the command again. Wifi worked even after waking from sleep. Default ant_sel=0 was giving the best signal. Thanks for the help @Gryu.
    – Devans Somani
    May 6, 2020 at 9:09

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