you need to re-install fprint_demo & libpam-fprint and remember to launch fprint_demo with superuser permission, and check if the new libfprint (patched) is installed in the correct directory...
you need to re-install fprint_demo & libpam-fprint and remember to launch fprint_demo with superuser permission, and check if the new libfprint (patched) is installed in the correct directory...