• The fingerprint sensor needs python-validity^AUR to work.
• For further configuration, See Fprint#Configuration
• To prevent the sensor not working when laptop waking up, create a systemd sleep hook:

/usr/lib/systemd/systemd-sleep/fix-fingerprint.sh

#!/bin/sh
PATH=/sbin:/usr/sbin:/bin:/usr/bin

case "$1" in
 pre)
 #code execution BEFORE sleeping/hibernating/suspending
  ;;
 post)
 #code execution AFTER resuming
 systemctl restart open-fprintd
 systemctl restart python3-validity
 systemctl restart open-fprintd-resume.service
  ;;
esac

• A network manager may be corrupted from resume, adding systemctl restart <NetworkManager> to the resume script mentioned before may help.

1. The key is visible to xev and similar tools
2. The physical key has a symbol on it, which describes its function

• 3dprogramin GitHub - possible fixes for P51 issues (based on an Archbang but still useful)