Quite simply I'm having issues with the contrast and brightness with this driver: http://cgit.freedesktop.org/libfprint/libfprint/commit/?id=a6101026d2ddff76efe9f46669e24db3a0a6a0e4 An example of a scan motion that would work well with it's windows driver is here: http://aeon.savagecl.com/uploads/vtHZDB6F.png