I think this is really a bug in packagekit. On 18.04 I can also trigger this by just running pkcon get-distro-upgrades in a terminal:
Transaction: Getting upgrades Status: Waiting in queue Status: Starting Status: Finished Results: Fatal error: Spawn of helper '/usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py' failed: failed to spawn /usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py: Failed to execute child process ?/usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py? The problem seems to be that in debian/rules this file is being deleted: 58 │ # Ubuntu-specific, broken 59 │ rm -f $(INSTALLDIR)/usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py But it is still referenced in backends/aptcc/pk-backend-aptcc.cpp: 287 │ /** 288 │ * pk_backend_get_distro_upgrades: 289 │ */ 290 │ void pk_backend_get_distro_upgrades(PkBackend *backend, PkBackendJob *job) 291 │ { 292 │ pk_backend_spawn_helper(spawn, job, "get-distro-upgrade.py", "get-distro-upgrades", NULL); 293 │ } Newer upstream versions of PackageKit (1.1.13) seem to have this file removed - and also the reference in backends/aptcc/pk-backend-aptcc.cpp. ** Also affects: packagekit (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to packagekit in Ubuntu. https://bugs.launchpad.net/bugs/1709699 Title: gpk-update-viewer fails with "Spawn of helper 'usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py' failed ... (No such file or directory)" Status in gnome-packagekit package in Ubuntu: Confirmed Status in packagekit package in Ubuntu: New Bug description: gpk-update-viewer fails with Spawn of helper '/usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py' failed: failed to spawn /usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py: Failed to execute child process “/usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py” (No such file or directory) This was detected by Robert Reinsch on a Ubuntu 17.04 system and was verified by me on a 17.10 daily build from 2017-08-09 ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-packagekit 3.24.0-0ubuntu1 ProcVersionSignature: Ubuntu 4.11.0-10.15-generic 4.11.8 Uname: Linux 4.11.0-10-generic x86_64 ApportVersion: 2.20.6-0ubuntu4 Architecture: amd64 CurrentDesktop: GNOME Date: Wed Aug 9 21:00:48 2017 ExecutablePath: /usr/bin/gpk-update-viewer InstallationDate: Installed on 2017-08-09 (0 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170807) SourcePackage: gnome-packagekit UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-packagekit/+bug/1709699/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp