Window titlebar context menus fail to appear in "Join displays" dual monitor mode

[Paul White]

New installation of Ubuntu 18.10, very few customisations made and I find that the right-click menu on window title bars fails to appear. Context menus do appear on application windows soI know that the mouse is working correctly.

I previously saw this issue with GNOME Shell 3.29 and reported it on the Ubuntu forums: https://ubuntuforums.org/showthread.php?t=2398652 but no-one else saw the issue so I went back to using 18.04 where this functionality works as expected.

The problem seems to be my dual monitor set-up.

I have a laptop with an external monitor set to act as the primary display in "Join Display" mode. In that configuration the context menu fails to appear. If I set the display mode to "Mirror" then the context menu appears. When "Single Display" is set context menus also appear as expected.

Conclusion: Window titlebar context menus fail to appear in "Join displays" dual monitor mode

This problem is also seen is a Live session using the same ISO image.

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: gnome-shell 3.30.0-1ubuntu2
ProcVersionSignature: Ubuntu 4.18.0-8.9-generic 4.18.7
Uname: Linux 4.18.0-8-generic x86_64
ApportVersion: 2.20.10-0ubuntu11
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue Oct 2 11:59:11 2018
DisplayManager: gdm3
GsettingsChanges:
 b'org.gnome.shell' b'favorite-apps' redacted by apport
 b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
 b'org.gnome.desktop.interface' b'clock-show-date' b'true'
InstallationDate: Installed on 2018-10-02 (0 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Beta amd64 (20181002)
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1795623

[Paul White (paulw2u)]

This issue was fixed after installing update gnome-shell 3.30.0-3ubuntu1 which surprisingly was received within an hour of reporting the bug.