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Working with the fingerprint reader

To check the device name of the fingerprint reader

$ lsusb
Bus 003 Device 003: ID 10a5:9800 FPC FPC Sensor Controller L:0002 FW:27.26.23.31

You can have different controllers depending on the PC model.

Download Driver

Lenovo officially provides the driver, which can be downloaded from the Lenovo PC support website under the E14 gen 4 section. The driver works with the E14 gen 5 model and some Ideapad models.

Driver Installaion

FPC FingerPrint Driver

First, download the driver from Lenovo PC support. Download Link

Extract the .zip file and cd into it directory.

Installation script can be found from Lenovo forums

Here are the step-by-step detailed guides that one can follow,

FPC driver

Edit the install.sh file at FPC_driver_linux_27.26.23.39/install_fpc/install.sh

if grep -qE 'ID=fedora' /etc/os-release; then
  sudo cp ./libfpcbep.so /usr/lib64/
  sudo chmod +x /usr/lib64/libfpcbep.so
else
  sudo cp ./libfpcbep.so /usr/lib/x86_64-linux-gnu/
fi;

then install by,

cd FPC_driver_linux_27.26.23.39/install_fpc
chmod +x install.sh
sudo ./install.sh

libfprint

Now, also edit the install.sh file at FPC_driver_linux_libfprint/install_libfprint/install.sh

if grep -qE 'ID=fedora' /etc/os-release; then
  sudo dnf -y install libfprint fprintd fprintd-pam 'dnf-command(versionlock)'
  sudo dnf versionlock libfprint
  sudo cp -r lib/* /usr/lib/
  sudo cp usr/lib/x86_64-linux-gnu/* /usr/lib64/
  sudo chmod +x /usr/lib64/libfprint-2*
else
  sudo cp -r lib/* /lib/
  sudo cp -r usr/* /usr/
  sudo mkdir -p /var/log/fpc
  #avoid libfprint being modified under apt upgrading
  echo "libfprint-2-2 hold" | sudo dpkg --set-selections
  sudo chmod 755 /usr/lib/x86_64-linux-gnu/libfprint-2.so.2.0.0
fi
echo "Installation completed successfully. You must reboot your system."

and, install by

cd FPC_driver_linux_libfprint/install_libfprint
chmod +x install.sh
sudo ./install.sh

For opensuse-tumbleweed replace with if grep -qE 'ID=opensuse-tumbleweed' /etc/os-release; then or simply copy the file

cd FPC_driver_linux_27.26.23.39/install_fpc/
sudo cp ./libfpcbep.so /usr/lib64/
sudo chmod +x /usr/lib64/libfpcbep.so
cd FPC_driver_linux_libfprint/install_libfprint/
sudo cp -r lib/* /usr/lib/
sudo cp usr/lib/x86_64-linux-gnu/* /usr/lib64/
sudo chmod +x /usr/lib64/libfprint-2*

and in Yast protected the libfprint-2* package from Software Management

Configuration

Whether you have the same fingerprint controller or not, this configuration is the same for all drivers.

First, register your fingerprint using kde-plasma or gnome settings.

If you use fprint then

# to enroll
fprintd-enroll
# to verify
fprintd-verify

To enable fingerprint authentification for the command line simply run

sudo pam-auth-update

Now, for authetication,

sudo pam-config --update --fprintd

or, for sddm, first copy the

sudo cp /usr/lib/pam.d/sddm /etc/pam.d/sddm

and put the lines at the beginning of the file

#%PAM-1.0
auth    [success=1 new_authtok_reqd=1 default=ignore]   pam_unix.so try_first_pass likeauth nullok
auth    sufficient      pam_fprintd.so

To configure kde lockscreen to accept password first and then fingerprint,

sudo cp /usr/lib/pam.d/kde /etc/pam.d/kde

and past the lines at the beginning of the file

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

Reference