Public bug reported:
Impact
======
Using Alt-Tab to leave a fullscreen game and then return breaks the game by
offsetting the game down by the size of the GNOME Shell top bar and to the
right by the size of the Ubuntu Dock.
Test Case
=========
1. Run a game full screen.
I installed Steam and used Team Fortress 2 because it's free (but a very
large download)
2. Press Alt-Tab or click a dock icon to switch to another window in the
same workspace and then press Alt-Tab or click the dock icon to switch
back to the game.
The game should display and function normally.
Workaround
==========
Switch apps again using any method.
Other Info
==========
This is a duplicate of #1732245 which has been reported on Ubuntu 17.10 which
reached it's end-of-life on July 19, 2018.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: mutter 3.28.3-2~ubuntu18.04.1
ProcVersionSignature: Ubuntu 4.15.0-30.32-generic 4.15.18
Uname: Linux 4.15.0-30-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Sep 2 14:36:29 2018
InstallationDate: Installed on 2018-07-10 (53 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: mutter
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: mutter (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic third-party-packages wayland-session
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Desktop Bugs, which is subscribed to mutter in Ubuntu.
https://bugs.launchpad.net/bugs/1790360
Title:
[wayland] Fullscreen games offset after switching back to them from an
app in the same workspace
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