progress hangs at half when installing updates

[Donald Pellegrino]

Ubuntu Software was run manually. The Updates tab was selected and one update was reported. The item was OS Update. The button was clicked to install the update.

The expected behavior was that installation should proceed consistently to 100%.

The observed behavior is that the button label changes to Installing and the button progress bar progresses to about 50%. At 50% the progress stops and it just sits there without any other visible output to the X session. The Ubuntu Software application is still responsive. It is possible to select the All and Installed tabs and the display will update as expected. However, the Updates tab remains stuck on 50%.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-software 3.20.1+git20160426.1.a976144-ubuntu-xenial-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Mon May 30 17:58:55 2016
EcryptfsInUse: Yes
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-software
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.