Что за экран входа в систему?

Это i3lock похоже, а не DM. В галерее было подобное, с «замыливанием» картинки.

Just install fprintd and libfprint. A version of libfprint greater than 0.6.0 is required because of commit 9f408bf51b7740e87c3d0b90e5adc5de3c37c052 (https://cgit.freedesktop.org/libfprin...). Currently this means that you must use the git version.

Screenlocking via i3lockmore (https://github.com/SammysHP/i3lockmore) and /etc/pam.d/i3lock:

auth required pam_env.so
auth sufficient pam_unix.so try_first_pass likeauth nullok
auth sufficient pam_fprintd.so

Other authentications like system-local-login or sudo contain:

auth sufficient pam_fprintd.so

Arch users can also read this (and install libfprint-git from AUR): https://wiki.archlinux.org/index.php/...

PS: The screens are not connected to my ThinkPad but to my desktop computer.

https://github.com/SammysHP/i3lockmore

Кстати видео с ютуба от автора скрипта.