I had found out that my Intel wireless adapter needs the backport on kernel 4.15 and at the same time my Alfa card needs realtek RTL8812AU. Also I cannot change kernel (skylake problem) More here
Is there a way to keep backport iwlwifi open and install RTL8812AU so I can use the external card as well? I will ask in another way: is there a way to have compatible using the same kernel:
- skylake processor
- RTL8812AU realtek adapter
- Intel Wireless-AC 9560 WLAN WiFi 802.11ac