*** This bug is a duplicate of bug 1813173 ***
    https://bugs.launchpad.net/bugs/1813173

Thanks. That confirms this is bug 1813173.

** This bug has been marked a duplicate of bug 1813173
   gnome-shell crashed with SIGSEGV in clutter_container_get_child_meta() when 
using the GPaste extension

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https://bugs.launchpad.net/bugs/1846252

Title:
  gnome-shell segfault

Status in gnome-shell package in Ubuntu:
  Incomplete

Bug description:
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04

  gnome-shell:
    Installed: 3.28.4-0ubuntu18.04.1

  At totally random times the screen will lock up, right in the middle
  use.  Everything is still there, and the mouse moves fine, just
  nothing responds.

  Switching to a txt terminal I can see that gnome-shell has segfaulted.

    dmesg -T | tail -50

  Once or twice I was able to get back by doing

    gnome-shell --replace &

  in that txt terminal.  It complains about wrong session type, but
  alt-F2 goes back to the desktop and all was well.  Except, weirdly,
  all terminal sessions were gone.  Chromium, Slack etc were all still
  running fine, just terminal was gone.  That's happened twice.

  Several times though the "gnome-shell --replace" bit doesn't work.
  The desktop is till there, but clearly not working correctly.  Mouse
  clicks only work on the active window/app, but won't select any other.
  Ctrl-tab works to switch active windows, then mouse will work in THAT
  window.  Good enough to cleanly shut apps down, then reboot.

  Heh, have to reboot from a terminal - can't click the upper-right ...

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: xorg 1:7.7+19ubuntu7.1
  ProcVersionSignature: Ubuntu 5.0.0-29.31~18.04.1-generic 5.0.21
  Uname: Linux 5.0.0-29-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset 
nvidia
  .proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: 
'/proc/driver/nvidia/gpus/0000:01:00.0'
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.suspend: suspend hibernate resume
  .proc.driver.nvidia.suspend_depth: default modeset uvm
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  430.50  Thu Sep  5 22:36:31 
CDT 2019
   GCC version:  gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
  ApportVersion: 2.20.9-0ubuntu7.7
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Oct  1 14:04:34 2019
  DistUpgraded: Fresh install
  DistroCodename: bionic
  DistroVariant: ubuntu
  DkmsStatus:
   nvidia, 430.50, 4.15.0-64-generic, x86_64: installed
   nvidia, 430.50, 5.0.0-27-generic, x86_64: installed
   nvidia, 430.50, 5.0.0-29-generic, x86_64: installed
  ExtraDebuggingInterest: Yes
  GpuHangFrequency: Once a week
  GpuHangReproducibility: Seems to happen randomly
  GpuHangStarted: Immediately after installing this version of Ubuntu
  GraphicsCard:
   Subsystem: Lenovo Device [17aa:3132]
   NVIDIA Corporation GK208B [GeForce GT 730] [10de:1287] (rev a1) (prog-if 00 
[VGA controller])
     Subsystem: Bitland(ShenZhen) Information Technology Co., Ltd. GK208B 
[GeForce GT 730] [1642:3f86]
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 1050:0407 Yubico.com 
   Bus 001 Device 002: ID 1b1c:1b15 Corsair 
   Bus 001 Device 004: ID 046d:c069 Logitech, Inc. M-U0007 [Corded Mouse M500]
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: LENOVO 10SKS0C100
  ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu@/vmlinuz-5.0.0-29-generic 
root=ZFS=/ROOT/ubuntu ro net.ifnames=0 biosdevname=0 root=ZFS=rpool/ROOT/ubuntu 
quiet splash vt.handoff=1
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/10/2019
  dmi.bios.vendor: LENOVO
  dmi.bios.version: M1UKT39A
  dmi.board.name: 3132
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40697 WIN 3305206851929
  dmi.chassis.asset.tag: MJ099889
  dmi.chassis.type: 3
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: 
dmi:bvnLENOVO:bvrM1UKT39A:bd05/10/2019:svnLENOVO:pn10SKS0C100:pvrThinkCentreM920s:rvnLENOVO:rn3132:rvrSDK0J40697WIN3305206851929:cvnLENOVO:ct3:cvrNone:
  dmi.product.family: ThinkCentre M920s
  dmi.product.name: 10SKS0C100
  dmi.product.sku: LENOVO_MT_10SK_BU_Think_FM_ThinkCentre M920s
  dmi.product.version: ThinkCentre M920s
  dmi.sys.vendor: LENOVO
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.97-1ubuntu1~18.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 19.0.8-0ubuntu0~18.04.2
  version.libgl1-mesa-glx: libgl1-mesa-glx 19.0.8-0ubuntu0~18.04.2
  version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.3
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
  version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

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