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Step-by-step – Debian Bullseye Realtek RTL8821cu Driver Installation

May 15, 2020 | By the+gnu+linux+evangelist.

Installing

  1. 5. Installing Realtek RTL8821cu Driver

    Especially relevant: for the Setup of the Morrownr variant, follow the instructions given by the Developer on GitHub!
    Then to Install Wi-fi Driver for Debian
    Access the Target folder, in case of a Git Checkout modifies the Path accordingly:

    cd /tmp/*master

    Or whatever else the Git Archive location.
    And then to Setup it play:

    sudo ./dkms-install.sh

    Last, in case of Troubles with Dkms you may Try with an Ordinary “make” “sudo make install” Setup.
    Finally, to Check the Dkms Installation:

    sudo dkms status

  2. 6. Loading Realtek RTL8821cu Driver

    Now to Load Realtek Driver into Debian’s Kernel
    Simply Reboot with:

    sudo reboot

    Then in Case of Issue with a USB Adapter.
    First, try to find your usb-wifi-adapter Device ID, like “0bda:1a2b”, by:

    lsusb

    switch the mode by type: (the device ID must be yours.)
    Need install usb_modeswitch!

    sudo usb_modeswitch -KW -v 0bda -p 1a2b

    Finally, for starting Bluetooth service if it’s in inactive

    sudo systemctl start bluetooth.service

    It should work.
    Thanks to brektrou!

    3. So Now I’m truly Happy if My Guide could Help you to Install Realtek RTL8821cu Driver on Debian Bullseye!

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