Bug exists in Ubuntu 16.04 LTS. Window is not shown on mate-panel. But it exists on screen:
$ wmctrl -lx 0x01a0000b 0 update-notifier.Update-notifier nikolay-UX32A ** Tags removed: amd64 ** Tags added: xenial ** Also affects: apport (Ubuntu) Importance: Undecided Status: New ** No longer affects: apport (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1267235 Title: "System program problem detected" dialog not shown in launcher To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-notifier/+bug/1267235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs