Fix > Wifi Activation failed for Ubuntu

If you have installed a new version of Linux Ubuntu or Mint distribution you might have issues with Realtek wifi adapter (USB) not connecting properly with weak wifi signal even if  the router is 5 feet away. The reason for this is faulty drivers, in my case i used RRTL8192 adapter.

In most cases ubuntu will automatically install the driver.

Here is how you resolve driver issues by manually compiling the linux driver (there are no readymade driver download available for this particular wifi adapter)

First check if your wifi manufacturer using this command and your device is

> lsusb

bu@pbu-desktop:~$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 0bda:818b Realtek Semiconductor Corp. RTL8192EU 802.11b/g/n WLAN Adapter
Bus 001 Device 003: ID 1a2c:6004 China Resource Semico Co., Ltd USB Keyboard
Bus 001 Device 002: ID 1a2c:0042 China Resource Semico Co., Ltd Usb Mouse
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Follow these installation steps

Easy

git clone https://github.com/clnhub/rtl8192eu-linux
sudo apt -y install linux-headers-generic build-essential dkms git
cd rtl8192eu-linux
./install_wifi.sh

Manual install

Remove available drivers with (skip if sudo lshw -C network and dkms status do not show any wifi drivers):

sudo rmmod 8192eu
sudo rmmod rtl8xxxu
sudo dkms remove -m rtl8192eu -v 1.0

Blacklist default driver (rtl8xxxu on Ubuntu):

echo "blacklist rtl8xxxu" >> ./blacklist-rtl8xxxu.conf
sudo mv ./blacklist-rtl8xxxu.conf /etc/modprobe.d/

Run add and install commands from driver directory:

sudo cp -ar . /usr/src/rtl8192eu-1.0
sudo dkms add -m rtl8192eu -v 1.0
sudo dkms install -m rtl8192eu -v 1.0

Load driver (or reboot):