Comment 78 for bug 1641290

Hi Igor,

I was looking to make the fp sensor on my new UX430UN notebook on ArchLinux and I found this subject. Here is my config and the results of my tests with the latest version cloned from https://github.com/iafilatov/libfprint.

lsusb -v : https://pastebin.com/ZSjAk2Ws

img_capture works... sometimes. When it doesn't I get a "image capture failed, code -22" error. I have the feeling that it happens when I don't "insist" enough while putting my finger on the sensor. For example, pressing it without moving for a second works, but swiping it more quickly doesn't ("-22"). Unfortunately, as you explained earlier, libfprint expects a swipe and the result images are pretty bad if I don't swipe. I can get relatively decent results when I swipe slowly [for libfprint] then keep pressing the tip of the finger (without moving) for half a second [to not get "error -22"].

I strugle to obtain a good-looking image like the one that is shown on github though (with the "center of the fingerprint"). I tried different movements, and it seems it works a bit better with the middle finger that with the index according to the image results, but I can't get "verify" to get a match ("enroll" mostly work even though I get get a lot of "swipe too short, try again").

If you want to try to improve this sensor's support in the library, I'd be more than happy to provide you as many test images and logs as you'd need. Please tell me how you'd like to exchange email addresses.

Thanks a lot for your time!