Before build this driver make sure make, gcc, linux-header and git have been installed.
mkdir -p ~/build
cd ~/build
git clone https://github.com/brektrou/rtl8821CU.git
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.
sudo apt-get install dkms
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
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.
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
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/$(uname -r)/kernel/drivers/net/wireless/realtek/rtl8821cu
Make sure 8821cu.ko file present on that directory
sudo dkms status
sudo cp /lib/modules/$(uname -r)/build/arch/arm/Makefile /lib/modules/$(uname -r)/build/arch/arm/Makefile.$(date +%Y%m%d%H%M)
sudo sed -i 's/-msoft-float//' /lib/modules/$(uname -r)/build/arch/arm/Makefile
sudo ln -s /lib/modules/$(uname -r)/build/arch/arm /lib/modules/$(uname -r)/build/arch/armv7l