I have just created a fresh install of Debian 10. I have disabled network-manager, since I find it extremely annoying, opting for wpa_supplicant (non-mobile wireless desktop). In order to get this to work, I followed the official guide on wiki.debian.org. Note that dhcpcd.service no longer exists, so I couldn't configure it.
Unfortunately, it does not work. There are a few strange things happening with it, namely that it does successfully raise the interface and associate, but fails anyway for some reason (you will see this in journalctl dump). There is also about a minutes wait during boot for "raising network interfaces".
What's even stranger is that once logged in, the interface is configured and has an ip address, but it's in a down state. ifup won't work at this point. if I su to root and lower and raise the wifi interface, it connects no problem and in a short amount of time.
I have no idea what could be causing this to happen, but it may have to do with something involving systemd targets. Does anyone know what's going on, and how it may be fixed?