Comment 51 for bug 790183

I applied the patch from here[1] and upload the package to my ppa[2]
It works on my Dell V131 machine, and probably work for the same chip on other machines.
Just need to install the libfprint from my ppa.

1. https://bugs.freedesktop.org/show_bug.cgi?id=61692
2. https://launchpad.net/~acelankao/+archive/fprint