Vanilla @debian is installed/running on my @olimex@fosstodon.org TERES-I laptop via debian-installer. If you experience a black screen upon bootup, there is a workaround: remove the installation media at the debian-installer boot select menu. What does this mean? You can easily create your own installer media (a ~90MB image) to install the operating system the way it was designed to be installed. You don't need a custom image sourced from a vendor.

https://wiki.debian.org/InstallingDebianOn/Olimex/Teres-I#Using_debian_installer