I have found gscan2pdf on the NUX repo, but installing this repo
evidently will add and replace many utilities, etc., that may not be
wise. gscan2pdf runs fine on Ubuntu 18 LTS as I just put in on my
wife's 2-in-1 that does not have tablet write-on support under SL 7 as
far as I can determine. Is there any SL 7.8 compatible gscan2pdf that
works?
Take care. Stay safe.
Yasha Karant