I just followed this guide https://jamesachambers.com/raspberry-pi ... ion-guide/
to install ubuntu server 64bit on my Raspberry pi 4B. I need 64bits as that insanely increases the hash rate when crypto mining.
I was able to successfully setup wifi. However, when running sudo apt update and sudo apt upgrade then rebooting, the wifi stopped working.
I checked ip link show and wlan0 no longer shows up.
Not sure what to do now. Nor whether this is the right place to ask for this.