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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.)

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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.

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