Comment 82 for bug 1731459

my scanner = Canoscan LiDE 100
couldn't use this scanner on 18.04 at all without getting a thick black line in the output.
not a massive issue so far as it still worked ok on a 16.04 machine we've got.
After checking back into this conversation today i tried to scan again on 18.04, issue was not resolved but then i tried the ppa mentoned above in comment #77
sudo add-apt-repository ppa:rolfbensch/sane-git
sudo apt-get dist-upgrade
tried again and bingo! black line has gone.
Thank you to everyone involved!