I've done some tracing between evince-previewer and papers-previewer side-by-side. The apparmor error looks unrelated.
What looks related, however is that although both share almost the same code, papers switched to GTK4. And gtk4 replaced the cups printing backend by the cpdb (common-print-dialog-backend). From the looks of it, there seems to be a bug in the gtk4 print-backend-cpds module. When receiving a refresh dbus method from gtk (org.openprinting.PrintBackend.doListing), the cpdb-backend-cups dbus service just dies and leaves gtk waiting for a dbus method timeout. I haven't gone much further than that. Targetting cups+gtk4 ** Also affects: gtk4 (Ubuntu) Importance: Undecided Status: New ** Also affects: cpdb-backend-cups (Ubuntu) Importance: Undecided Status: New ** Changed in: papers (Ubuntu) Assignee: Simon Poirier (simpoir) => (unassigned) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2107233 Title: papers-previewer appamor denials To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cpdb-backend-cups/+bug/2107233/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs