Could you remove all the gnome extensions you've got installed and try again? I understand those are pretty brittle.
Thanks ** Information type changed from Private Security to Public Security -- 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/1804031 Title: gnome-shell crashed with SIGSEGV in clutter_x11_handle_event() Status in gnome-shell package in Ubuntu: Invalid Bug description: I pressed a button on my Wacom tablet at the Gnome shell lock screen. Once it crashed I was able to see the apps/desktop for a while until the lock screen appeared again. ProblemType: Crash DistroRelease: Ubuntu 18.04 Package: gnome-shell 3.28.3-0ubuntu0.18.04.2 ProcVersionSignature: Ubuntu 4.15.0-38.41-generic 4.15.18 Uname: Linux 4.15.0-38-generic x86_64 NonfreeKernelModules: lkp_Ubuntu_4_15_0_38_41_generic_45 ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 CrashCounter: 1 CurrentDesktop: ubuntu:GNOME Date: Mon Nov 19 18:38:17 2018 DisplayManager: gdm3 ExecutablePath: /usr/bin/gnome-shell InstallationDate: Installed on 2017-03-13 (616 days ago) InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2) ProcCmdline: /usr/bin/gnome-shell SegvAnalysis: Segfault happened at: 0x7fa27d2b2b38: cmp %ebp,0x8(%rax) PC (0x7fa27d2b2b38) ok source "%ebp" ok destination "0x8(%rax)" (0x00000008) not located in a known VMA region (needed writable region)! SegvReason: writing NULL VMA Signal: 11 SourcePackage: gnome-shell StacktraceTop: ?? () from /usr/lib/x86_64-linux-gnu/mutter/libmutter-clutter-2.so ?? () from /usr/lib/x86_64-linux-gnu/mutter/libmutter-clutter-2.so ?? () from /usr/lib/x86_64-linux-gnu/mutter/libmutter-clutter-2.so clutter_x11_handle_event () from /usr/lib/x86_64-linux-gnu/mutter/libmutter-clutter-2.so ?? () from /usr/lib/x86_64-linux-gnu/libmutter-2.so.0 Title: gnome-shell crashed with SIGSEGV in clutter_x11_handle_event() UpgradeStatus: Upgraded to bionic on 2018-08-24 (87 days ago) UserGroups: adm cdrom dip libvirt libvirtd lpadmin plugdev sambashare sudo To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1804031/+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
