I've got the same problem with Ubuntu 16.04.2 LTS on ThinkPad x260 (default installation with Unity and Lightdm)
Had to switch to an alternative implementation "fingerprint-gui" from https://launchpad.net/~fingerprint/+archive/ubuntu/fingerprint-gui
The experience is much better. Specifically, pressing Escape on the Lock screen re-starts the fingerprint authentication.
I've got the same problem with Ubuntu 16.04.2 LTS on ThinkPad x260
(default installation with Unity and Lightdm)
Had to switch to an alternative implementation "fingerprint-gui" from /launchpad. net/~fingerprin t/+archive/ ubuntu/ fingerprint- gui
https:/
The experience is much better.
Specifically, pressing Escape on the Lock screen re-starts the fingerprint authentication.