it's similar to bug 1724247 and 2 report mention that it happened during installation of opera and wireshark which both show debconf prompts during installation.
** Changed in: gnome-software (Ubuntu) Importance: High => Critical -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-software in Ubuntu. https://bugs.launchpad.net/bugs/1722185 Title: gnome-software (11) g_io_channel_shutdown → pk_client_helper_copy_stdout_cb → g_main_dispatch → g_main_context_dispatch → g_main_context_iterate Status in gnome-software package in Ubuntu: Confirmed Bug description: The Ubuntu Error Tracker has been receiving reports about a problem regarding gnome-software. This problem was most recently seen with package version 3.26.0-0ubuntu3, the problem page at https://errors.ubuntu.com/problem/f111546905209e7288c7f8ba5f8f19eea4d97bad contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports. If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1722185/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp