I ran the following commands:
sudo add-apt-repository ppa:fingerprint/fingerprint-gui
sudo apt update
sudo apt install libbsapi policykit-1-fingerprint-gui fingerprint-gui
Then, I registered my fingerprints to the application.
But when I am opening my laptop it is asking me to type password while it should open using fingerprint.
But the commands which require password are getting executed just by fingerprint and do not require any password
Ubuntu 18.04 minimum dist comes with gdm3 pre-configured when you perform a clean install. While the docs here FingerpringGui Docs Do say its 18.04 compatible i have been having issues trying to get it to login in using a fingerprint hiding the user login and using the finger to find user and password. (This is risky to do so don't do it unless you can be sure it works)
After trying many different options i finally came to the solution on just removing gdm3 and installing lightdm.
sudo apt install lightdm
when asked which should be the default display manager select lightdm
There is no need to reinstall fingerprint-gui just open
click on the settings tab and verify that
a) lightdm, gnome-screensaver, sudo and su are not greyed out.
b) Check all the tests pass.
You should now be able to use the fingerprint scanner for all of the above.
If you test lightdm or gnome-screensaver and you get ok, but the test button is grayed out. Don't panic hit enter.
Restart your computer and voila.
With 18.04 for now I would wait before removing the login inputs and using the fingerprint-gui, 1 to many function that helps to find a user and password.
I did this on my fresh Ubuntu 18.04 - dell vostro:
Install the applications needed:
You may want to change the PAM configuration to use fingerprint for sudo: And check the Fingerprint authentication option. So when you use sudo it will ask to fingerprint. If you wait the fingerprint timeout it will ask for standard password.
Reboot Then go to settings/users and enable the Fingerprint Login. You may need to reboot.