so this is what i know about my problem.

i used a tethering phone to install a usb wi-fi driver. i updated, then i installed these packages:

https://aur.archlinux.org/packages/rtl8821au-dkms-git/
https://www.archlinux.org/packages/core/x86_64/linux-headers/

i rebooted and i can’t get the monitor to show the damn OS.

what i know is that :

-grub works
-my usb driver works, even if the monitor gets off