Onboard Fails to Display on Login Screen When System Rebooted

[X]

1) When the system is suspended and resumed, Onboard correctly displays the on-screen keyboard, allowing the user to enter their password and log in.

2) However, if the system is power-cycled, Onboard incorrectly displays a black area where the keyboard should be, and ignores user input. Clicking on the 'universal access' icon has no effect.

3) This bug is a show-stopper, because it makes it impossible to run Ubuntu on a tablet unless there is a physical keyboard attached

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: onboard 1.2.0-0ubuntu4
ProcVersionSignature: Ubuntu 4.4.0-16.32-generic 4.4.6
Uname: Linux 4.4.0-16-generic x86_64
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
Date: Sat Apr 9 14:44:36 2016
InstallationDate: Installed on 2016-04-01 (8 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323)
ProcEnviron:
 LANGUAGE=en_US
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: onboard
UpgradeStatus: No upgrade log present (probably fresh install)

[X (pvh-ubuntu)]

Screen capture: Expected operation at resume screen

[X (pvh-ubuntu)]

Incorrect operation at login screen, following a reboot

[marmuta (marmuta)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug #1562734, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.