Indeed the last update solved this issue, gnome-software now works fine. It also doesn't output any message on the terminal anymore.
If the problem was to happen again I will follow your instructions and upload the backtrace. Thank you, you can close this bug report. -- 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/1788380 Title: gnome-software crash at startup: Gs failed to call gs_plugin_add_updates_historical on fwupd Status in gnome-software package in Ubuntu: Incomplete Bug description: When starting gnome-software, the GUI displays for a second or two, then the program crashes. Starting from a terminal: ============================================== ~$ gnome-software 10:44:25:0971 Gtk Theme parsing error: gtk.css:1278:13: The 'icon-shadow' property has been renamed to '-gtk-icon-shadow' 10:44:25:0971 Gtk Theme parsing error: gtk.css:1281:15: The 'icon-shadow' property has been renamed to '-gtk-icon-shadow' 10:44:26:0850 Gs enabled plugins: packagekit-url-to-app, packagekit-local, packagekit, packagekit-refresh, desktop-categories, systemd-updates, shell-extensions, ubuntuone, packagekit-upgrade, packagekit-offline, packagekit-refine-repos, os-release, fwupd, packagekit-proxy, appstream, steam, hardcoded-featured, generic-updates, hardcoded-popular, hardcoded-blacklist, ubuntu-reviews, rewrite-resource, packagekit-refine, desktop-menu-path, modalias, snap, provenance, packagekit-history, provenance-license, icons, key-colors, key-colors-metadata 10:44:26:0850 Gs disabled plugins: dummy, repos, dpkg, odrs, epiphany 10:44:27:0048 Gs failed to call gs_plugin_add_updates_historical on fwupd: failed to build result for b14589ec7f862a4e461e6da0da9ecb713097344d 10:44:27:0842 GLib g_str_has_prefix: assertion 'prefix != NULL' failed 10:44:27:0875 GLib g_str_has_prefix: assertion 'prefix != NULL' failed 10:44:27:0903 Gs Only 0 apps for recent list, hiding Segmentation fault (core dumped) ============================================== I tried uninstalling and reinstalling fwupd, which didn't correct the problem. Also Gnome-software will complain and close if fwupd isn't available. Attached /var/crash/_usr_bin_gnome-software.1000.crash ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-software 3.28.1-0ubuntu4.18.04.1 ProcVersionSignature: Ubuntu 4.15.0-32.35-generic 4.15.18 Uname: Linux 4.15.0-32-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 CurrentDesktop: communitheme:ubuntu:GNOME Date: Wed Aug 22 12:45:09 2018 EcryptfsInUse: Yes InstallationDate: Installed on 2018-07-22 (30 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) InstalledPlugins: gnome-software-plugin-flatpak N/A gnome-software-plugin-limba N/A gnome-software-plugin-snap 3.28.1-0ubuntu4.18.04.1 SourcePackage: gnome-software UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1788380/+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