how can we enable the fingerprint login in ubuntu 20.04?

Question

As I know we don't need to install any library for ubuntu 20.04 where we can enable by Settings->Users->Authentication & Login.

but when I trying to enable I'm getting an error "Could not access any fingerprint readers Please contact your system administrator for help!"

P:S. I have an inbuilt fingerprint sensor on my machine, but when using lsusb I could not able to see fingerprint driver.

Solution

There is no driver available for most fingerprint readers at the moment for most Lenovo laptops. But to be sure you can do a check.

1.Install this package sudo apt install hw-probe

2.Run this command sudo -E hw-probe -all (creates a File with all devices which is located in /root/HW_PROBE/LATEST/hw.info/devices.json)

3.Open the file from the last command: (first type sudo su) gedit /root/HW_PROBE/LATEST/hw.info/devices.json

4.Find the fingerprint reader somewhere at the bottom of this file and if you see "Status" : "failed" then there is no driver installed.

5.The first line of the fingerprint driver is something like this "usb:28ck-58dk" (example)

6.https://linux-hardware.org/index.php?view=search open this and write into DeviceID 58dk (example) and check if the driver in which kernel will be supported.

Comments

[linuxbuild]

All libfprint* drivers are userspace drivers, not kernel drivers. You'll not be able to find driver w/o uploading the probe in your case because search is performed in the libfprint source code.

[kannzzmm2]

Are you sure ? Because I found for my Laptop that no driver is installed without uploading the probe..

[linuxbuild]

Not installed, but may exist.