*** This bug is a duplicate of bug 1886059 *** https://bugs.launchpad.net/bugs/1886059
Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1886059, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find. ** This bug has been marked a duplicate of bug 1886059 gnome-shell crashed with assertion failure "!xcb_xlib_threads_sequence_lost" [xcb_io.c:260] -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1924613 Title: gnome-shell assert failure: gnome-shell: ../../src/xcb_io.c:260: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed. Status in gnome-shell package in Ubuntu: New Bug description: 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 mutter 3.36.7 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 (`cat /var/log/dpkg.log | 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 separator: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1924613/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp