As a long time, on and off Debian user, I've actually never had debian-installer install firmware properly. For the longest time, using the minimal install imag

As a long time, on and off Debian user, I've actually never had debian-installer install firmware properly. For the longest time, using the minimal install image, putting the firmware debs (or loose files) in the correct directory just plain didn't work. I think at some point, it started working and I could use wifi instead of ethernet to install, but even now the installer still doesn't install AMD firmware, so some kernel modesetting funny business doesn't work and I just get a black screen on first boot (but the system is otherwise functional). The same applies to the firmware-included non-free image. I mean, I can (and do) manually apt-get the right firmware packages at some point, either popping a shell during install or after first boot, but it is definitely a maze of some kind, especially if you don't know what package contains the firmware you need.