I forgot to mention that also needed is something like /etc/udev/rules.d/59-local.rules.
In my upgraded installation it has not changed since 16.04 and looks like this:
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# Brother MFC-J220
ATTRS{idVendor}=="04f9", ATTRS{idProduct}=="0259", MODE="0664", GROUP="scanner", ENV{libsane_matched}="yes"
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Of course 'idProduct' has to match the local scanner model, 'lsusb' and 'sane-find-scanner' are your friends.
I forgot to mention that also needed is something like /etc/udev/ rules.d/ 59-local. rules. =="04f9" , ATTRS{idProduct }=="0259" , MODE="0664", GROUP="scanner", ENV{libsane_ matched} ="yes"
In my upgraded installation it has not changed since 16.04 and looks like this:
---------------
# Brother MFC-J220
ATTRS{idVendor}
---------------
Of course 'idProduct' has to match the local scanner model, 'lsusb' and 'sane-find-scanner' are your friends.