By accident (I just run 'script -c screen' to debug something for someone else) I saw that GNU screen on trixie outputs: /etc/screenrc: unknown command 'deflogin' /etc/screenrc: bind: unknown command 'login' This does not happen on bullseye. The manpage documents these commands so they haven’t generally been removed.
This is expected as screen on trixie is built without utempter support. Best, Chris