Comment 0 for bug 1573206

Ubuntu 16.04 LTS (clean install). 64-bit. Final release.
Gnome-software version: 3.20.1+git20160420.1.ca63436.ubuntu-xenial-0ubuntu2
  Version table:
 *** 3.20.1+git20160420.1.ca63436.ubuntu-xenial-0ubuntu2 500
        500 http://no.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

I intended to install MEGA Sync Client, Google Chrome and Dropbox by downloading the needed packages from their websites (respectively https://mega.nz/#sync and https://www.google.com/chrome/ and https://www.dropbox.com/install?os=lnx ). I opened the packages one by one with gnome-software and pressed Install - nothing, except for a super-quick progress bar animation, happened. No matter how many times I tried, same result. Also, an icon pops up on the panel saying "Waiting to install", but nothing seems to happen.

This only seems to happen with third-party packages; installing a random deb from packages.ubuntu.com/xenial worked.

I even tried to reinstall the system to make this work, but same problem.

Gdebi, however, installs the packages as expected.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: gnome-software 3.20.1+git20160420.1.ca63436.ubuntu-xenial-0ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Apr 21 21:01:52 2016
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/gnome-software
InstallationDate: Installed on 2016-04-21 (0 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
ProcEnviron:
 LANGUAGE=nn_NO:nn:no_NO:no:nb_NO:nb:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=nn_NO.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-software
UpgradeStatus: No upgrade log present (probably fresh install)