Troubleshooting with a usb adapter.

[ManKingProxx]

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.

[Mister_X]

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

[ManKingProxx]

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!

[Mister_X]

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

[ManKingProxx]

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