It looks like Archer T9UH needs RTL8812AU driver. I have kernel 4.18.0-21. I have performed steps described
here (accepted answer) but the hardware still doesn't work (on Windows 10 works fine).
Code:
sudo dkms status
nvidia, 430.14, 4.18.0-20-generic, x86_64: installed
nvidia, 430.14, 4.18.0-21-generic, x86_64: installed
rtl8812au, 4.3.14, 4.18.0-21-generic, x86_64: installed
Do you have any idea what is wrong ?