The Debian bug has some comments stating that creating /var/lock/sane is enough to make things work, could you confirm if that's the case for you?
** Changed in: sane-backends (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1898905 Title: Unfunctional plustek scanner in Ubuntu 20.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/1898905/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs