This very much looks like a bug int Aptdaemon's PK compatibility layer to me. At this point, it likely makes no sense to fix this issue, since that code has been dropped after the Xenial release.
@tlc: This will likely be a won't fix bug, please upgrade to Bionic if you can. If you can't upgrade, you can try to switch from the compat layer to the real PK daemon, if the system allows you to do that: sudo apt purge python3-aptdaemon.pkcompat ; sudo apt install packagekit ** Package changed: packagekit (Ubuntu) => aptdaemon (Ubuntu) -- 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/1774491 Title: pkcon install fails -- proxy? Status in aptdaemon package in Ubuntu: New Bug description: Xenial Desktop. I am behind a proxy but have no idea how to configure a proxy for pkcon. Proxies are set and working in /etc/environment and /etc/apt $ sudo apt-get install packagekit-tools $ pkcon install pianobar Command failed: The proxy could not be set: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Traceback (most recent call last): File "/usr/lib/python3/dist-packages/dbus/service.py", line 654, in _message_cb (candidate_method, parent_method) = _method_lookup(self, method_name, interface_name) File "/usr/lib/python3/dist-packages/dbus/service.py", line 246, in _method_lookup raise UnknownMethodException('%s is not a valid method of interface %s' % (method_name, dbus_interface)) dbus.exceptions.UnknownMethodException: org.freedesktop.DBus.Error.UnknownMethod: Unknown method: SetProxy is not a valid method of interface org.freedesktop.PackageKit ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: packagekit-tools 0.8.17-4ubuntu6~gcc5.4ubuntu1.2 ProcVersionSignature: Ubuntu 4.4.0-124.148-generic 4.4.117 Uname: Linux 4.4.0-124-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 CurrentDesktop: Unity Date: Thu May 31 15:39:40 2018 InstallationDate: Installed on 2015-01-08 (1239 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) SourcePackage: packagekit UpgradeStatus: Upgraded to xenial on 2016-09-23 (615 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/aptdaemon/+bug/1774491/+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
