And I'm also copying the relevant parts of the description of bug #1712991, which is private (not sure why but it's not up to me to decide whether it should be made public):
=============================================================== 1. Laptop switched of (no power) after scanning document 2. After restart can not start star simple-scan simple-scan (simple-scan:3519): Gtk-WARNING **: Failed to register client: GDBus.Error:org.gnome.SessionManager.AlreadyRegistered: Unable to register client Segmentation fault (core dumped) ProblemType: Crash DistroRelease: Ubuntu 17.10 Package: simple-scan 3.25.90-0ubuntu1 ProcVersionSignature: Ubuntu 4.12.0-12.13-generic 4.12.8 Uname: Linux 4.12.0-12-generic x86_64 ApportVersion: 2.20.6-0ubuntu7 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Fri Aug 25 09:41:56 2017 ExecutablePath: /usr/bin/simple-scan =============================================================== That plus the comment about deleting the cache makes me think that an abrupt shutdown (e.g. a power outage) can result in a corrupted cache, which simple-scan isn't able to gracefully handle. -- 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/1620720 Title: /usr/bin/simple- scan:11:page_view_get_pixel:page_view_set_pixel:page_view_update_preview:page_view_update_page_view:page_view_render Status in simple-scan package in Ubuntu: Confirmed Bug description: The Ubuntu Error Tracker has been receiving reports about a problem regarding simple-scan. This problem was most recently seen with version 3.20.0-0ubuntu1, the problem page at https://errors.ubuntu.com/problem/5d14b5ef920c7cf703fc36d412ecf55b28c6621e contains more details. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/simple-scan/+bug/1620720/+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
