Public bug reported:

Sometimes the system will not respond to mouse clicks or keypresses.
This appears to happen when I hold the mouse over an item and a pop-up
tooltip appears, or when I click on a menu.  I believe it happens when
the tooltip/menu is set to disappear.

Steps to reproduce are:
 1) Select a menu item
 2) Click outside the menu
 3) The click won't register for around 7 or 8 seconds.  No other keypresses 
register immediately but will occur around 7 seconds later. 

This occurs in GNOME, GNOME applications and also for non-GNOME
applications such as Firefox and Chrome.


lsb_release -rd:

Description:    Ubuntu Zesty Zapus (development branch)
Release:        17.04


apt-cache policy gnome-session:

gnome-session:
  Installed: 3.24.0-0ubuntu1
  Candidate: 3.24.0-0ubuntu1
  Version table:
 *** 3.24.0-0ubuntu1 500
        500 http://nz.archive.ubuntu.com/ubuntu zesty/universe amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: gnome-shell 3.24.0-0ubuntu2
ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
Uname: Linux 4.10.0-19-generic x86_64
ApportVersion: 2.20.4-0ubuntu3
Architecture: amd64
CurrentDesktop: GNOME
Date: Mon Apr 10 11:39:40 2017
DisplayManager: gdm3
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-05-12 (332 days ago)
InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Release amd64 
(20160421)
ProcEnviron:
 LANGUAGE=en_NZ:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_NZ.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to zesty on 2017-04-08 (1 days ago)

** Affects: gnome-shell (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug zesty

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https://bugs.launchpad.net/bugs/1681290

Title:
  UI experiences delay when menu / tooltip disappears

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