seatd

Do not depend on logind (or elogind) for libseat
basu may not be needed if we use the builtin backend
Do we need basu alongside seatd for ipc to completely avoid logind/systemd?
Group name video vs seat (prefer the former as it already exists)
Provide a seatd service file with the video group owning the socket:

#!/bin/sh
exec seatd -g video 2>&1

References