Please start by uninstalling all of these extensions:

'[email protected]',
'[email protected]',
'[email protected]',
'[email protected]',
'[email protected]',
'[email protected]',
'native-window-placem...@gnome-shell-extensions.gcampax.github.com',
'[email protected]',
'[email protected]',
'screenshot-window-si...@gnome-shell-extensions.gcampax.github.com',
'[email protected]',
'[email protected]'

and then reboot. Since we find so many bugs are caused by extensions,
removing them must be the first thing we try. And they need to be
uninstalled and not just disabled because a buggy extension can still
interfere with the shell.

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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/1866933

Title:
  Gnome Shell freeze

Status in gnome-shell package in Ubuntu:
  Incomplete

Bug description:
  when I click on the Activities button and try to start an application
  my X session freezes. I can move the mouse around and bring up the
  dock on the side of the screen, but no windows will come up. This
  problem does not come up if I open applications from the applications
  menu, dock, or terminal. I can only solve it by logging out and
  logging back in.

  Description:  Ubuntu Focal Fossa (development branch)
  Release:      20.04

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
  Uname: Linux 5.4.0-14-generic x86_64
  .tmp.unity_support_test.0:
   
  ApportVersion: 2.20.11-0ubuntu20
  Architecture: amd64
  BootLog:
   
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Mar 10 20:12:16 2020
  DistUpgraded: Fresh install
  DistroCodename: focal
  DistroVariant: ubuntu
  DkmsStatus:
   virtualbox, 6.1.4, 5.4.0-14-generic, x86_64: installed
   virtualbox-guest, 6.1.4, 5.4.0-14-generic, x86_64: installed
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes, including running git bisection searches
  GpuHangFrequency: Several times a day
  GpuHangReproducibility: Yes, I can easily reproduce it
  GpuHangStarted: Within the last few days
  GraphicsCard:
   Intel Corporation Iris Graphics 540 [8086:1926] (rev 0a) (prog-if 00 [VGA 
controller])
     Subsystem: Intel Corporation Iris Graphics 540 [8086:2063]
  InstallationDate: Installed on 2017-10-19 (873 days ago)
  InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-14-generic 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/24/2019
  dmi.bios.vendor: Intel Corp.
  dmi.bios.version: SYSKLi35.86A.0071.2019.0524.1102
  dmi.board.asset.tag:
   �[�
  dmi.board.name: NUC6i5SYB
  dmi.board.vendor: Intel corporation
  dmi.board.version: H81131-505
  dmi.chassis.type: 3
  dmi.modalias: 
dmi:bvnIntelCorp.:bvrSYSKLi35.86A.0071.2019.0524.1102:bd05/24/2019:svn:pn:pvr:rvnIntelcorporation:rnNUC6i5SYB:rvrH81131-505:cvn:ct3:cvr:
  version.compiz: compiz 1:0.9.14.1+20.04.20200211-0ubuntu1
  version.libdrm2: libdrm2 2.4.100-4
  version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.0-1ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.0-1ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20190815-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu20
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  DisplayManager: gdm3
  DistroRelease: Ubuntu 20.04
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2017-10-19 (875 days ago)
  InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
  Package: gnome-shell 3.35.91-1ubuntu2
  PackageArchitecture: amd64
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
  RelatedPackageVersions: mutter-common 3.35.91-1ubuntu1
  Tags:  focal
  Uname: Linux 5.4.0-14-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers video
  _MarkForUpload: True

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