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Thread: Troubleshooting with a usb adapter.

  1. #1

    Exclamation Troubleshooting with a usb adapter.

    Hello guys.

    I have a TP-Link WN821N and install Kali Linux in a dual boot with Windows 7 and I don't have idea how install the drivers. I read and from what I understood is a normal problem but I don't find the solution.

    I try to view the usb with lsusb and this is the result:

    With the usb plugged:
    root@kali:~# lsusb
    Bus 001 Device 005: ID 05c6:f00e Qualcomm, Inc.
    Bus 001 Device 003: ID 2357:0107
    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 003 Device 002: ID 1a2c:2c27 China Resource Semico Co., Ltd
    Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 002 Device 002: ID 1c4f:0034 SiGma Micro
    Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

    With the usb unplugged:
    root@kali:~# lsusb
    Bus 001 Device 005: ID 05c6:f00e Qualcomm, Inc.
    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 003 Device 002: ID 1a2c:2c27 China Resource Semico Co., Ltd
    Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 002 Device 002: ID 1c4f:0034 SiGma Micro
    Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

    With the usb plugged again:
    root@kali:~# lsusb
    Bus 001 Device 005: ID 05c6:f00e Qualcomm, Inc.
    Bus 001 Device 003: ID 2357:0107
    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 003 Device 002: ID 1a2c:2c27 China Resource Semico Co., Ltd
    Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 002 Device 002: ID 1c4f:0034 SiGma Micro
    Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

    So, the conclusion is: it's recognize but it don't works.

    What can I do?

    Thanks in advance.

  2. #2
    Join Date
    2016-Dec
    Posts
    600
    Yes, it is recognized. You can see the ID 2357:0107.

    Here is how lsusb works: it looks up in a text file to see if the USB ID matches what is there. If yes, it displays the text associated. If not, as you saw, it's empty. It doesn't prevent OS/driver from loading the appropriate driver (if any driver has that ID linked).

    You can update USB ID database and it may be there: update-usbids

  3. #3
    Hello, I solve the problem!
    I find the chipset version and I download the correct drivers. Nevertherless, in the moment that I installed the drivers, with lsusb it doesn't change the previous post but it works.
    Thanks!

  4. #4
    Join Date
    2016-Dec
    Posts
    600
    As I said, this is just information.

    This is the first entry(/entries) of the /var/lib/usbutils/usb.ids where lsusb gets its information
    0001 Fry's Electronics
    7778 Counterfeit flash drive [Kingston]
    So, in this case, if a USB device with an ID 0001:7778, it will display "Fry's Electronics Counterfeit flash drive [Kingston]".
    If a device has an ID of 0001:1234, since it doesn't fully match what is in file, and only match the vendor, it will display "Fry's Electronics"
    In your case, the vendor wasn't found, so there is nothing it will display.

    Above the 2 lines about Fry's I mentioned, you can see comments explaining it:

    # Syntax:
    # vendor vendor_name
    # device device_name <-- single tab
    # interface interface_name <-- two tabs

  5. #5
    Thanks for explaining me this doubt. I'll keep it in mind in the future for other "problems".

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