Comment 0 for bug 1924613

Description: Ubuntu 20.04.2 LTS
Release: 20.04

gnome-shell:
  Installed: 3.36.7-0ubuntu0.20.04.1
  Candidate: 3.36.7-0ubuntu0.20.04.1
  Version table:
 *** 3.36.7-0ubuntu0.20.04.1 500
        500 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     3.36.4-1ubuntu1~20.04.2 500
        500 http://archive.ubuntu.com/ubuntu focal-security/main amd64 Packages
     3.36.1-5ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages

Description of issue: The GUI seems to freeze/reload/refresh instantly. It happens when I e.g. click on the docker panel and/or just move the mouse cursor around, click on apps and do something GUI related, open folders. The GUI reload/refresh crash lasts for about 2 seconds, it suddenly/instantly repositions my mouse cursor to the lower right corner of the screen and my laptop's fan works harder at those 2 seconds. The issue started after I updated and, at a later time, rebooted the machine.
Below are the gnome-related upgrades that I did (`history | grep gnome`):

2021-04-15 17:50:29 status triggers-pending gnome-menus:amd64 3.36.0-1ubuntu1
2021-04-15 17:50:30 upgrade libreoffice-gnome:amd64 1:6.4.6-0ubuntu0.20.04.1 1:6.4.7-0ubuntu0.20.04.1
2021-04-15 17:50:30 status half-configured libreoffice-gnome:amd64 1:6.4.6-0ubuntu0.20.04.1
2021-04-15 17:50:30 status unpacked libreoffice-gnome:amd64 1:6.4.6-0ubuntu0.20.04.1
2021-04-15 17:50:30 status half-installed libreoffice-gnome:amd64 1:6.4.6-0ubuntu0.20.04.1
2021-04-15 17:50:30 status unpacked libreoffice-gnome:amd64 1:6.4.7-0ubuntu0.20.04.1
2021-04-15 17:50:56 configure libreoffice-gnome:amd64 1:6.4.7-0ubuntu0.20.04.1 <none>
2021-04-15 17:50:56 status unpacked libreoffice-gnome:amd64 1:6.4.7-0ubuntu0.20.04.1
2021-04-15 17:50:56 status half-configured libreoffice-gnome:amd64 1:6.4.7-0ubuntu0.20.04.1
2021-04-15 17:50:56 status installed libreoffice-gnome:amd64 1:6.4.7-0ubuntu0.20.04.1
2021-04-15 17:50:57 trigproc gnome-menus:amd64 3.36.0-1ubuntu1 <none>
2021-04-15 17:50:57 status half-configured gnome-menus:amd64 3.36.0-1ubuntu1
2021-04-15 17:50:57 status installed gnome-menus:amd64 3.36.0-1ubuntu1
2021-04-15 18:00:30 status triggers-pending gnome-menus:amd64 3.36.0-1ubuntu1
2021-04-15 18:00:30 trigproc gnome-menus:amd64 3.36.0-1ubuntu1 <none>
2021-04-15 18:00:30 status half-configured gnome-menus:amd64 3.36.0-1ubuntu1
2021-04-15 18:00:30 status installed gnome-menus:amd64 3.36.0-1ubuntu1

ProblemType: Crash
DistroRelease: Ubuntu 20.04
Package: gnome-shell 3.36.7-0ubuntu0.20.04.1
ProcVersionSignature: Ubuntu 5.8.0-49.55~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-49-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
AssertionMessage: gnome-shell: ../../src/xcb_io.c:260: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.
CasperMD5CheckResult: skip
CrashCounter: 1
CurrentDesktop: ubuntu:GNOME
Date: Thu Apr 15 22:04:15 2021
DisplayManager: gdm3
ExecutablePath: /usr/bin/gnome-shell
ExecutableTimestamp: 1608008084
InstallationDate: Installed on 2021-01-17 (88 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
ProcCmdline: /usr/bin/gnome-shell
ProcCwd: /home/freekostageo
RelatedPackageVersions: mutter-common 3.36.7+git20201123-0.20.04.1
Signal: 6
SourcePackage: gnome-shell
StacktraceTop:
 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
 __GI_abort () at abort.c:79
 __assert_fail_base (fmt=0x7feadaaeb588 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x7feada528858 "!xcb_xlib_threads_sequence_lost", file=0x7feada5286c3 "../../src/xcb_io.c", line=260, function=<optimized out>) at assert.c:92
 __GI___assert_fail (assertion=0x7feada528858 "!xcb_xlib_threads_sequence_lost", file=0x7feada5286c3 "../../src/xcb_io.c", line=260, function=0x7feada528b10 "poll_for_event") at assert.c:101
 ?? () from /lib/x86_64-linux-gnu/libX11.so.6
Title: gnome-shell assert failure: gnome-shell: ../../src/xcb_io.c:260: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip docker lpadmin lxd plugdev sambashare sudo
modified.conffile..etc.xdg.autostart.gnome-shell-overrides-migration.desktop: [modified]
mtime.conffile..etc.xdg.autostart.gnome-shell-overrides-migration.desktop: 2021-01-28T02:14:06.107431
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