@Peter Bennett,
Have you created the symlinks from /usr/lib/sane to /usr/lib/x86_64-linux-gnu/sane? Alternatively, have you tried searching for the scanner as root?
@Peter Bennett,
Have you created the symlinks from /usr/lib/sane to /usr/lib/ x86_64- linux-gnu/ sane? Alternatively, have you tried searching for the scanner as root?