Comment 146 for bug 1728012

Same as Jean COLIN:
...
[dll] load: searching backend `epkowa' in `/usr/lib/x86_64-linux-gnu/sane'
[dll] load: trying to load `/usr/lib/x86_64-linux-gnu/sane/libsane-epkowa.so.1'
[dll] load: dlopen()ing `/usr/lib/x86_64-linux-gnu/sane/libsane-epkowa.so.1'
[dll] init: initializing backend `epkowa'
[dll] init: backend `epkowa' is version 1.0.213
[dll] load: searching backend `ls5000' in `/usr/lib/x86_64-linux-gnu/sane'
[dll] load: trying to load `/usr/lib/x86_64-linux-gnu/sane/libsane-ls5000.so.1'
[dll] load: dlopen()ing `/usr/lib/x86_64-linux-gnu/sane/libsane-ls5000.so.1'
[dll] init: initializing backend `ls5000'
[dll] init: backend `ls5000' is version 1.0.0
[dll] sane_get_devices: found 1 devices
[dll] sane_open: trying to open `epkowa:interpreter:003:006'
[dll] sane_open: open successful
...

Besides, in spite the fact the workaround worked for me (able to scan), there are still some issues:
a. the scanner is very slow to detect (at least one minute, against a few seconds under Ubuntu 16.04)
b. my scanner is sheet fed, but gets identified as a flatbed scanner, which results in some options being grayed out in "Image Scan!" (iscan)

I'll try as, Jean, to replace the libsane-epkowa.so.1 by the one provided with the Epkowa package to see if it solved those issues as well.