Realtek-RTL8821CU

Realtek RTL8821CU Driver Source

Notes

This driver source has been modified as extensively as possible for stability.

Installation guide

git clone https://github.com/wildyverando/Realtek-RTL8821CU.git
cd Realtek-RTL8821CU
make -j $(nproc)
make install

then reboot your device

detect as rtl8188gu and cdrom mode ?

run this command

usb_modeswitch -KW -v 0bda -p 1a2b

set it as permanent

edit usb_modswitch rules

nano /lib/udev/rules.d/40-usb_modeswitch.rules

add this line

ATTR{idVendor}=="1234", ATTR{idProduct}=="5678", RUN+="/usr/sbin/usb_modeswitch -K -v 1234 -p 5678"

Make sure you change the ATTR id vendor value from default to the actual idVendor value, and also ensure that the idProduct value matches the output in lsusb.

for example in my usbwifi the output from lsusb

Bus 001 Device 002: ID 0bda:1a2b Realtek Semiconductor Corp. RTL8188GU 802.11n WLAN Adapter (Driver CDROM Mode)

then in my configuration should like this

ATTR{idVendor}=="0bda", ATTR{idProduct}=="1a2b", RUN+="/usr/sbin/usb_modeswitch -K -v 0bda -p 1a2b"