Realtek RTL8811CU/RTL8821CU USB wifi adapter driver version 5.4.1 for Linux 4.4.x up to 5.3.x
Before build this driver make sure make
, gcc
, linux-header
and git
have been installed.
First, clone this repository
mkdir -p ~/build
cd ~/build
git clone https://github.com/brektrou/rtl8821CU.git
Build and install with DKMS
DKMS is a system which will automatically recompile and install a kernel module when a new kernel gets installed or updated. To make use of DKMS, install the dkms package.
Debian/Ubuntu:
sudo apt-get install dkms
Arch Linux/Manjaro:
sudo pacman -S dkms
To make use of the DKMS feature with this project, just run:
./dkms-install.sh
If you later on want to remove it, run:
./dkms-remove.sh
Plug your USB-wifi-adapter into your PC
If wifi can be detected, congratulations. If not, maybe you need to switch your device usb mode by the following steps in terminal:
- find your usb-wifi-adapter device ID, like "0bda:1a2b", by type:
lsusb
- switch the mode by type: (the device ID must be yours.)
Need install usb_modeswitch
(Archlinux: sudo pacman -S usb_modeswitch
)
sudo usb_modeswitch -KW -v 0bda -p 1a2b
It should work.
Build and install without DKMS
Use following commands:
cd ~/build/rtl8821CU
make
sudo make install
If you later on want to remove it, do the following:
cd ~/build/rtl8821CU
sudo make uninstall
Checking installed driver
If you successfully install the driver, the driver is installed on /lib/modules/<linux version>/kernel/drivers/net/wireless/realtek/rtl8821cu
. Check the driver with the ls
command:
ls /lib/modules/$(uname -r)/kernel/drivers/net/wireless/realtek/rtl8821cu
Make sure 8821cu.ko
file present on that directory
Check with DKMS (if installing via DKMS):
sudo dkms status