in part related to does Lenovo fingerprint reader work in ubuntu?
i did follow the several instructions one can find on here and elsewhere. i succeeded also in enrolling my index finger with the gui and with running pam-uth-update activated the fingerprint-reader for login or sudo commands
whenever i now boot the machine or give sudo commands i get a command shown to identify with my finger. the LED of the fingerprint-reader also SHORTLY lights up and then goes off.
SOMETIMES logging in like that works most of the times it does not work
i am sure this has to do with the led being on for short moment only.
but why?? any log to check??
btw: works fine in windows 7 so hardware is okay and lusb also shows my reader is supported by finger-print-gui