** Changed in: gnome-shell (Ubuntu)
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/1779846

Title:
  Pressing Alt+Backslash locks up all windows (no focus)

Status in gnome-shell package in Ubuntu:
  Invalid

Bug description:
  I've recently switched from 16.04/Unity to 18.04/Gnome3, with new
  hardware (a Lenovo Thinkpad T470s) used mostly with a docking station
  and external keyboard.

  I do heavily use of in-workspace windows switch (eg, Alt+Esc) and i've found 
that every time i press Alt+Backslash (in Italian keyboard layout Backslash is 
all left, between TAB and Esc keys) my session ''lock up'': i can switch 
between windows, i can use the gnome shell and the top bar (status bar?), i can 
even run other application (via Alt+F2 or gnome shell menu) but every window 
(old or new) are ''locked'', like there's no focus: no keyboard nor mouse 
interaction is possible.
  Application are not 'locked', they continue to run, but there's no way to 
interact with them.

  I can also lock the screen, or put the system in standby: i can awaken
  from that, insert the password but still no focus on windows.

  The only solution: logout.

  I've also tried to define a keyboard shortcut to map Alt+Backslash,
  but... gnome keyboard configurator locks as every other window when i
  press the keys.

  Please, help me at least to disable that 'killer' keyboard shortcut!
  ;-)

  Thanks.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: gnome-shell 3.28.1-0ubuntu2
  ProcVersionSignature: Ubuntu 4.15.0-24.26-generic 4.15.18
  Uname: Linux 4.15.0-24-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Jul  3 12:16:18 2018
  DisplayManager: gdm3
  GsettingsChanges:
   b'org.gnome.shell' b'enabled-extensions' 
b"['system-moni...@paradoxxx.zero.gmail.com', 
'workspace-g...@mathematical.coffee.gmail.com', 'windows-alt-...@tglman.org']"
   b'org.gnome.shell' b'command-history' redacted by apport
   b'org.gnome.shell' b'favorite-apps' redacted by apport
   b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
  InstallationDate: Installed on 2018-05-25 (38 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=it_IT.UTF-8
   SHELL=/bin/bash
  SourcePackage: gnome-shell
  UpgradeStatus: No upgrade log present (probably fresh install)

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