Had the same issue on 16.04 Xenial, fixed by the workaround of using Rolf Bensch's ppa.
Xenial (and other releases) still has 1.0.25+git20150528-1ubuntu2 versions of sane* packages which have this bug. Solution is easy: update to the latest official 1.0.25 release, no need for further analysis of this bug. ** Changed in: sane-backends (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1512027 Title: open of device pixma:MX7600_... failed: invalid argument To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/1512027/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs