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    Wifi usb adapter

    Good evening
    I premise that I am a neophyte and I have installed on my laptop Hp dv6 Kubuntu 22.10.
    The internal wifi card works only at 2.4 Ghz and I would like to use the adapter in question to take advantage of the 5 Ghz band as well.
    I installed the drivers following some guides on the net and giving the command "dkms status" from terminal I get:
    bcmwl/6.30.223.271+bdcom, 5.19.0-21-generic, x86_64: installed
    bcmwl/6.30.223.271+bdcom, 5.19.0-31-generic, x86_64: installed
    rtl8821cu/5.12.0.4, 5.19.0-31-generic, x86_64: installed


    Everything seems fine but I can't find the adapter anywhere to make the change.
    Could you please help me?
    Thank you​

    #2
    The adapter is : Realtek Semiconductor Corp. 802.11ac NIC
    P.s. excuse me for the bad English

    Comment


      #3
      We need to see more info about the USB adapter.

      lsusb will show it.

      The ID numbers and info will be useful to make sure that you are trying to use the correct driver.
      Which specific instructions are you following? They could be old, outdated, or just wrong.

      Comment


        #4
        Code:
        Bus 002 Device 004: ID 064e:a127 Suyin Corp. HP Integrated Webcam 
        Bus 002 Device 003: ID 152d:0578 JMicron Technology Corp. / JMicron USA Technolog
        y Corp. JMS578 SATA 6Gb/s
        Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
        Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
        Bus 001 Device 005: ID 046d:c077 Logitech, Inc. Mouse
        Bus 001 Device 004: ID 05e3:0606 Genesys Logic, Inc. USB 2.0 Hub / D-Link DUB-H4
        USB 2.0 Hub
        Bus 001 Device 003: ID 0bda:c811 Realtek Semiconductor Corp. 802.11ac NIC
        Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
        Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
        Last edited by Snowhog; Feb 28, 2023, 01:19 PM.

        Comment


          #5
          Originally posted by Amtab View Post
          I installed the drivers following some guides on the net
          So, which specific thing did you follow?

          Originally posted by Amtab View Post
          Bus 001 Device 003: ID 0bda:c811 Realtek Semiconductor Corp. 802.11ac NIC
          This matters as kernel change, drivers get old, and github forks stop being maintained, etc.
          But rtl8821CU is the correct device

          Comment


            #6
            The device doesn't work so I'd better buy another one

            Comment


              #7
              There is a good website with a list of supported USB-WIFI adapters - if you want to buy a new one that works ootb:
              https://github.com/morrownr/USB-WiFi
              Last edited by Schwarzer Kater; Mar 01, 2023, 09:06 AM. Reason: typos
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