I go on trying to get my scanner work here. With some help from drb I now get the scanner work, but only as root not as user.
When starting xsane as user I get the message as in the attachment. Its in Swedish so here is a try to translate the text to English. "Could not open unit" ------ "Access to resource denied"

My user vilde is belonging to this groups : vilde lp dialout cdrom floppy audio dip video plugdev systemd-journal kvm lpadmin netdev bluetooth scanner saned fuse powerdev storage