pam, fingerprint-gui and lightdm

Hi folks,
first of all, I want to thank you for the great job you have done providing this great distro!

My system config is:

* T430s
* CLDX/amd64 3.14.22-calculate
* package(s) to enable the fingerprint reader:
** [I] sys-auth/fingerprint-gui (1.05-r1)

I need to enable for the lightdm login manager, so I can login without typing a password.

So far I have enabled fingerprint-gui for su login by adding following line (at the second position) to /etc/pam.d/system-auth

auth sufficient

Can somebody shed more light on how to use&alter the files in /etc/pam.d/*?
Any help or hint would be appreciated.

Regards, Mark

Hi, try looking at these links: