Arch linux ThinkPad T480 fingerprint reader

fingerprint.sh

yay -S python-validity-git
sudo validity-sensors-firmware
sudo systemctl start python3-validity
fprintd-enroll

I installed omarchy (which is basically an Arch) on my T480 and had trouble configuring the fingerprint reader.

I removed fprintd and installed open-fprintd and python-validity. I ran the command to download the firmware, but it still didn't work.

It only worked for me after I identified that the device had an "auto" suspend setting. I changed it to "on" with the command:

echo 'on' | sudo tee /sys/bus/usb/devices/1-9/power/control

PS: You'll need to identify the device ID, in my case 1-9. I created a small bash loop that identifies the ID:

# Find exactly device ID
for device in /sys/bus/usb/devices/*; do
    if [ -f "$device/idVendor" ]; then
        vendor=$(cat "$device/idVendor" 2>/dev/null)
        product=$(cat "$device/idProduct" 2>/dev/null)
        if [ "$vendor" = "06cb" ] && [ "$product" = "009a" ]; then
            echo "Device found in:: $(basename $device)"
            echo "Path: $device"
        fi
    fi
done

Ahh, sure, remember that the device identified in my lsusb is: Bus 001 Device 006: ID 06cb:009a Synaptics, Inc. Metallica MIS Touch Fingerprint Reader. This is reflected in the code above in the line if [ "$vendor" = "06cb" ] && [ "$product" = "009a" ]; then