Fingerprint sensor in Arch Linux

Arch Linux doesn't include authentication for a fingerprint sensor by default. My Dell XPS15 has a fingerprint sensor on the power button. Would be nice to use for logins and system authentication.

fprint from the Arch Wiki details the solutions. Requires a supported sensor.

To check the sensor, install the usbutils package and then run lsusb. That will show the supported devices. My fingerprint sensor is the Goodix device, which is on the list of supported devices

lsusb

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 27c6:63ac Shenzhen Goodix Technology Co.,Ltd. Goodix USB2.0 MISC
Bus 003 Device 003: ID 0c45:672e Microdia Integrated_Webcam_HD
Bus 003 Device 004: ID 8087:0026 Intel Corp. AX201 Bluetooth
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

For initial support, I installed the fprintd package. I then enrolled my fingerprint with the following command:

fprintd-enroll

To add fingerprint support for login, the following was added to the /etc/pam.d/sddm file:

auth 			[success=1 new_authtok_reqd=1 default=ignore]  	pam_unix.so try_first_pass likeauth nullok
auth 			sufficient  	pam_fprintd.so