No WiFi networks are detected

Question

OS: Budgie Ubuntu 16.04

Adapter: RTL8723BE Realtek Wireless Network Adapter

I also have Windows on dual-boot, and the wifi works on Windows so this is not a hardware problem. I have Tried reinstalling the bcmwl-kernel-source, tried restarting the network-manager, but nothing has worked.

Sometimes, it detects my own WiFi and connects to it but there is no internet access. (It doesn't detect the other wifi networks, even then.)

Possible duplicate of How do I get a Realtek RTL8723BE wireless card to work? — karel, Jun 22 '18 at 13:58
I had similar issues with wifi on Ubuntu 16.04. They disappeared after ugrading Ubuntu to 18.04 — Radeau, Jun 22 '18 at 13:41

score 0 · Answer 1 · answered Jun 22 '18 at 13:27

Quite often, the weak signal is a symptom of the antenna wire being connected to connection #1 on the card when the default driver is expecting to see the signal at connection #2. Of course, you could open the laptop and switch the wire or you could implement antenna selection at the driver level.

From the terminal:

sudo -i
echo "options rtl8723be ant_sel=2"  >  /etc/modprobe.d/rtl8723be.conf
exit

Reboot. Is there any improvement? If not, run the sequence again with ant_sel=1 and reboot again.

No WiFi networks are detected

1 Answers1