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Thread: WiFi Adapter (RTL8811AU) Driver Installation Issue on Raspberry Pi 4 (Ubuntu

  1. #11
    Join Date
    Mar 2024
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    11

    Re: WiFi Adapter (RTL8811AU) Driver Installation Issue on Raspberry Pi 4 (Ubuntu

    The output was
    Code:
    modprobe -c | grep -i c811
    alias usb:v0403pC811d*dc*dsc*dp*ic*isc*ip*in* ftdi_sio

  2. #12
    Join Date
    May 2014
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    /home
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    10,965
    Distro
    Ubuntu 20.04 Focal Fossa

    Re: WiFi Adapter (RTL8811AU) Driver Installation Issue on Raspberry Pi 4 (Ubuntu

    So what is happening when you try to compile the modules from the source code on github?

  3. #13
    Join Date
    Mar 2024
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    11

    Re: WiFi Adapter (RTL8811AU) Driver Installation Issue on Raspberry Pi 4 (Ubuntu

    The driver get installed but can not recognize my wifi usb adapter

  4. #14
    Join Date
    May 2014
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    10,965
    Distro
    Ubuntu 20.04 Focal Fossa

    Re: WiFi Adapter (RTL8811AU) Driver Installation Issue on Raspberry Pi 4 (Ubuntu

    Try
    Code:
    sudo depmod -a
    Then reboot

  5. #15
    Join Date
    Mar 2024
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    11

    Re: WiFi Adapter (RTL8811AU) Driver Installation Issue on Raspberry Pi 4 (Ubuntu

    I will try it tomorrow thnx for help

  6. #16
    Join Date
    Feb 2020
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    160

    Re: WiFi Adapter (RTL8811AU) Driver Installation Issue on Raspberry Pi 4 (Ubuntu

    > ID 0bda:c811

    That ID tells us that the chipset in your adapter is a rtl8821cu, not the rtl8821au.

    You said the following driver did not work:

    https://github.com/morrownr/8821au-20210708.git

    The reason it did not work is between you did not read the README:

    "Note: Please read the file "supported-device-IDs" for information about how to confirm that this is the correct driver for your adapter."

    That statement is right up near the top of the README. Had you read it and followed the instructions, you would have known you were looking at the wrong driver.

    The correct driver for your adapter is:

    https://github.com/morrownr/8821cu-20210916

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