Wifi problem, help please [solved]

Question

it turns out that my laptop had windows and I decided to put linux, specifically Elementary OS.

Even though everything is fine, WiFi does not. The speed is much slower, I have 60mb and in windows I reached 60mb.

Sometimes I have 40-50mb, other times it does not reach 10mb and other times I do not even have wifi, while on my other computer I have the exact 60mb. We do not talk about days, this happens all the time.

I tried everything, install Ubuntu, Deepin, follow internet guides that are useless, but I could not fix it. What can happen?

Answer 1

This guide helped in my case: https://connectwww.com/how-to-solve-realtek-rtl8723be-weak-wifi-signal-problem-in-ubuntu/4625/

My problem was that my wifi card had 2 antennae but only one was plugged in and the linux drivers were using the wrong one. This downloads new drivers and changes the ant_sel option to 2.

git clone https://github.com/lwfinger/rtlwifi_new
cd rtlwifi_new
sudo make install
sudo modprobe -rv rtl8723be 
sudo modprobe -v rtl8723be ant_sel=2

If it doesn't solve the problem, try with sudo modprobe -v rtl8723be ant_sel=1.

If the problem was resolved, then use this command to make the change permanent across reboots:

echo "options rtl8723be ant_sel=2" | sudo tee /etc/modprobe.d/50-rtl8723be.conf

(or ant_sel=1, as the case may be).

Be aware that some updates replace the above configuration and so you might have to change this periodically. I made a bash script in my home with the above commands (minus the git clone part, of course) and run it when I see that the internet is unbearable slow.

Also, you might want to try disabling bluetooth. For some reason my laptop cannot connect on the internet if BT is enabled.