Ubuntu – D-Link DWA-130 rev E1 RTL8191SU Wont Connect to Network (14.04)

There are some issues with certain manufacturer implementations of the wireless N standard that doesn't play nice with Linux. Also sometimes having wired ethernet up can interfere. I wrote a quick script that I placed into my public GitHub repository that fixes this on most people's systems. You can find it here: https://github.com/FreedomBen/handy-bash-scripts/blob/master/fixTheInternet.bash

Run that script each time you boot up, and your wireless should work well. It will be limited to G speeds, but that's still really fast.

If you'd rather run the commands in a terminal yourself, here they are. The script is handy though because you can just run it everytime you boot and you don't have to remember these commands:

sudo ifconfig eth0 down
sudo modprobe -r iwlwifi
sudo modprobe iwlwifi 11n_disable=1

I wonder if the router might be wireless n only, if so the next command and a reboot should fix echo "options iwlwifi 11n_disable=8" | sudo tee -a /etc/modprobe.d/iwlwifi.conf

disable IPv6 in network manager by selecting ignore and add the terminal results for dmesg | grep iwl then add another change to the module echo "options iwlwifi bt_coex_active=N" | sudo tee -a /etc/modprobe.d/iwlwifi.conf

Reboot with ethernet cable unplugged