I confirm that Ubuntu 14.04.4 with neither 1.4.15-1 from official Trusty repository nor newest version 1.4.22-1 from Xenial repository works with AU9520 reader. Downgrading to 1.4.2-2 solves the issue for me too.
I confirm that Ubuntu 14.04.4 with neither 1.4.15-1 from official Trusty repository nor newest version 1.4.22-1 from Xenial repository works with AU9520 reader. Downgrading to 1.4.2-2 solves the issue for me too.