Comment 89 for bug 1641290

@Matt
Thanks for your input!
25a1 is not is the list of supported models so I'm pretty sure the driver wouldn't pick it up without modification. It only recognizes 0903, 0907 and 0c01-0c33. Are you sure it's not something else, maybe touchpad? What does lsusb | grep 04f3 show? Could you please compile with debug support (https://github.com/iafilatov/libfprint#trying-it-out) and paste the first ~30 lines of examples/img_capture?

For fprintd(-enroll) to work you need fprintd to link against the compiled and installed libfprint lib. If you installed fprintd as a package, it likely pulled original libfprint as dependency and keeps using it. See ldd `which fprintd` | grep libfprint. If it's not in /usr/local/... , it's the original one. You may need to [configure and] run ldconfig.