Now I see the root cause of problem: https://www.fujitsu.com/pl/products/computing/peripheral/scanners/scansnap/ix500/
Your scanner doesn't have FlatBed. To workaround it you could use ADF feeder. ** Changed in: simple-scan (Ubuntu) Status: Invalid => New -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to simple-scan in Ubuntu. https://bugs.launchpad.net/bugs/1709890 Title: Simple Scan Ignores Back or Front & Back Selections Fujitsu ScanSnap iX500 Status in simple-scan package in Ubuntu: New Bug description: What I expect to happen: I expect to get scan output from the back of the page when back is selected, front and back output when front & back is selected in preferences. What happens: only front is shown. $ lsb_release -rd Description: Ubuntu 16.04.3 LTS Release: 16.04 $ apt-cache policy simple-scan simple-scan: Installed: 3.20.0-0ubuntu1 Candidate: 3.20.0-0ubuntu1 Version table: *** 3.20.0-0ubuntu1 500 500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages 100 /var/lib/dpkg/status To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/simple-scan/+bug/1709890/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp