It's a very interesting alternative to typing my password all the time when sudoing, but it doesn't work for me. If the lighting is bad it takes way too long to give up (please give up in a second or so, it's not worth the hassle to me), when it <i>does</i> succeed it produces a segfault so the command isn't run, the PAM profile doesn't work, just grants permission without any auth, etc etc.