Stray B being printed after switching workspaces with wayland

[Heather Ellsworth]

The problem is that a stray "B" character is being printed to the terminal screen after switching work spaces with the Ctrl+Alt+{Up/Down arrows}.

On the first workspace, I have a few applications running (Firefox is focused)
On the second workspace I have gnome terminal 3.35.91 running in full screen (F11, so no window boarder) running.

I Ctrl+Alt+Up Arrow to switch to the first workspace and do some things in FF and then Ctrl+Alt+Down Arrow to switch back to the second workspace and now see a "B" on the command line.

This happens over and over.. I see the capital B on the commandline when I switch to this workspace where the terminal is fullscreened.

Some things to note about when this happens:
* This only happens with wayland
* It happens fairly often but not 100% of the time
* The key character created is always a "B"
* I've only seen this key character be created on gnome-terminal
* There are no journalctl logs generated when this occurs
* I have to release the Ctrl+Alt+Up and then do Ctrl+Alt+Down to see the B. (If I keep Ctrl+Alt pressed and then do Up and Down, the B is not generated)
* It seems more likely to happen if the first workspace is switched to, spend some time there just clicking things or typing or whatever, and then go back to the second workspace
* It only happens if gnome-terminal is full screen'd with F11

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-shell 3.35.91-1ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
Uname: Linux 5.4.0-14-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu18
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Mar 4 17:24:36 2020
DisplayManager: gdm3
InstallationDate: Installed on 2019-09-13 (172 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
ProcEnviron:
 TERM=screen
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: mutter-common 3.35.91-1ubuntu1
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to focal on 2020-02-28 (4 days ago)

[Launchpad Janitor (janitor)]

This bug was fixed in the package mutter - 3.36.1-3ubuntu1

---------------
mutter (3.36.1-3ubuntu1) focal; urgency=medium

  * Merge with debian, with new upstream releases and cherry-picked fixes:
    - Screens turn off when setting display scaling to 200% (LP: #1869750)
    - Use hardware cursor for DisplayLink devices (LP: #1867757)
    - Fix popup menus with using focus-follow-mouse (LP: #1871107)
    - Window manager key events are sent to the terminal (LP: #1866094)
    - Ensure assertion 'window->unmanaging || workspace != NULL' (LP: #1864326)
    - Shell crash on meta_wayland_surface_role_get_window (LP: #1869837)
  * d/p/x11-Add-support-for-fractional-scaling-using-Randr.patch:
    - Refreshed to respect upstream changes
    - Fixed a bug causing windows using direct-rendering to be continuously
      resized, keeping ability to use shell UI (LP: #1862081)
  * Remaining changes with debian:
    - debian/control:
      + Update VCS flags to point to ubuntu salsa branch
    - debian/gbp.conf: update branch to point to ubuntu/master
    - debian/patches/x11-Add-support-for-fractional-scaling-using-Randr.patch:
      + X11: Add support for fractional scaling using Randr

mutter (3.36.1-3) experimental; urgency=medium

  * Team upload
  * Update to upstream gnome-3-36 branch, commit 3.36.1-16-gdb164bcfa
    - Fix a crash during X11 drag-and-drop, for example when dragging
      a JPEG file onto GIMP's splash screen
    - Fix a crash in X11 input device handling
    - Translate coordinates of absolute input devices for rotated screens

mutter (3.36.1-2) experimental; urgency=medium

  * Team upload
  * Standards-Version: 4.5.0 (no changes required)
  * d/copyright: Consolidate entries and update
  * Update to upstream gnome-3-36 branch, commit 3.36.1-13-gbc47f0a1a

mutter (3.36.1-1) experimental; urgency=medium

  * Team upload
  * New upstream release
  * d/copyright: Update
  * Refresh patches
  * Update symbols file.
    Note that this includes ABI breaks: some symbols that are only used
    internally have disappeared from mutter's private fork of Clutter and
    Cogl. The only user of this version of mutter is GNOME Shell, which
    does not use these symbols.
  * d/patches: Update from gnome-3-36 branch up to 3.36.1-8-ge339a57dd
  * d/p/clutter-stage-Don-t-assume-stage-relayouts-reallocate-eve.patch:
    Add patch proposed upstream to fix a gnome-shell crash with the
    "Native window placement" extension.

 -- Marco Trevisan (Treviño) <email address hidden> Thu, 09 Apr 2020 14:40:58 +0200