Wifi Extremely Slow in Ubuntu 16.04 with Intel Centrino Wireless N 1000

Question

After perusing through several answers here and trying them out, I'm stumped as to what's causing the slow wifi on my laptop.

For reference, I tested the wifi on my laptop both in Windows 7 and in Ubuntu 16.04 LTS. I clocked an average down speed of ~28 Mbps on Windows and ~9 Mbps in Ubuntu.

I tried this Ask Ubuntu answer which brought my Ubuntu down speed to ~22 Mbps but my speeds go back down after the laptop comes back from sleep.

I used the wireless-info script to post my wifi information here.

Please let me know if there's any additional information needed and I'll get right on it. Thanks for your help.

Answer 1

I would change the channel the wifi router is on to channel 9, then I would disable wifi power management with

sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf
systemctl restart network-manager.service

You may also benefit from enabling aggressive TX in the iwlwifi module with

sudo modprobe -r iwlwifi
sudo modprobe iwlwifi 11n_disable=8

If there is no improvement with that setting you can just reboot for it to return to the default setting

Answer 2

I had same type of problem with ubuntu 16.04 in my HP laptop with realtek wireless card. I installed a repo made by a friend and it's working fine now. The repo link is :

https://github.com/roopansh/rtl8723be_wifi

Answer 3

Try creating shell script in /etc/pm called rm_precedence.sh with the following conent:

#!/bin/bash

case "$1" in
  hibernate|thaw|resume|suspend)
    sed -i '/^#.* precedence ::ffff:0:0/96 100 /s/^#//' /etc/gai.conf
    ;;
esac

And don´t forget to make it executable with sudo chmod +x rm_precedence.sh

I hope this helps you.