[Bug 1774491] [NEW] pkcon install fails -- proxy?

[tlc]

Public bug reported:

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)

** Affects: packagekit (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug third-party-packages xenial

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https://bugs.launchpad.net/bugs/1774491

Title:
  pkcon install fails -- proxy?

Status in packagekit 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)

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