Comment 5 for bug 1310104

Same behaviour here, just as Rüdiger Kupper described it. I am also affected.
Everything worked beautifully with Ubuntu 13.10.
After the update to Ubuntu 14.04 (via dist-upgrade) the trouble with fprintd and lightdm started for me.
My guess is: every person with a laptop with fingerprint-reader running Ubuntu 14.04 might be affected by this.
What could I do, what files could I provide to help solve this?