Wifi USB adapter not found Ubuntu 20.04

Question

I have two operating systems: Windows 10 and Ubuntu 20.04 on the same PC. When I boot windows 10 - everything works fine. When I load ubuntu 20.04 - it fails to turn on the WiFi adapter. This problem appeared recently, it was working fine before. Very strange is the fact that when I execute the lsusb command - it lists correctly the usb wireless adapter. It looks like the adapter is connected and recognized by ubuntu, however it is somehow is turned off internally. When I load the Windows 10 - the wifi adapter start lighting up and blinking, but when loading ubuntu - it is always dark. It was working fine few month ago.

$ lsusb output:

Bus 001 Device 002 ID 2357:0120 TP-Link 802.11ac WLAN Adapter

I'm not able to connect to the internet from that PC while having the issue. I can't do sudo apt-get update or sudo apt-get upgrade or any other command that requires an active internet connection because the internet is not available ((((

@waltinator not really. There is nothing realted to the problem to my problem. It looks like the Windows OS is blocking the WiFi adapter. I wanted to know if it's possible to turn the WiFi adapter on from the Ubuntu side. — Semen Shekhovtsov, Mar 13 '23 at 20:52
The device requires a compiled driver that itself requires several dependencies. Are you able to temporarily use an ethernet connection or else tether your phone? If so, the solution is quick and easy. — chili555, Mar 13 '23 at 21:18
@chili555 nope, I can't connect to the internet at all. The key point is that it worked fine few month ago. Same device, same Ubuntu 20.04 OS, same drivers — Semen Shekhovtsov, Mar 13 '23 at 21:22
Do you have a directory somewhere on your system named rtl8812au or similar? — chili555, Mar 13 '23 at 21:36

score 1 · Accepted Answer · answered Mar 13 '23 at 20:54

1

That adapter is not supported : https://linux-hardware.org/index.php?id=usb:2357-0120

Get a small USB one that is, anything marketed as for a Raspberry Pi, for instance will work.

answered Mar 13 '23 at 20:54

Tom Chiverton

34

actually you were right. This hardware has no default drivers. I had to install additional drivers: rtl8812au https://askubuntu.com/questions/1233440/tplink-archer-t2u-ubuntu-20-04 – Semen Shekhovtsov Mar 13 '23 at 22:50

score 0 · Answer 2 · answered Mar 13 '23 at 22:51

0

The solution is to use the aircrack drivers. See https://github.com/aircrack-ng/rtl8812au

sudo apt install git dkms
git clone https://github.com/aircrack-ng/rtl8812au.git
cd rtl8812au
sudo make dkms_install

answered Mar 13 '23 at 22:51

Semen Shekhovtsov

113

Wifi USB adapter not found Ubuntu 20.04

2 Answers2