I tried enabling "pushes contents around" and restarting but still no
bug. Let us know if you think of any other unique factors in your setup.
Do you have anything installed in ~/.local/share/gnome-shell/extensions
?

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https://bugs.launchpad.net/bugs/2099933

Title:
  display freezes when magnifier is activated

Status in gnome-shell package in Ubuntu:
  Incomplete

Bug description:
  When I activate the zoom feature, the screen is well magnified but the mouse 
pointer stops moving when displacing the mouse, the display is frozen. A kind 
of shadow mouse pointer seems to be moving behind with hover effects on UI 
components, but the screen and "real" mouse pointer don't.
  When I deactivate the magnifier, the problem disappears.

  I can see this error message appearing in the logs when I activate the
  magnifier at 20:23 :

  before the activation but could be related :

  gnome-shell[1755]: clutter_actor_set_name: assertion 'CLUTTER_IS_ACTOR 
(self)' failed
  fnome-shell[1755]: clutter_actor_set_accessible_name: assertion 
'CLUTTER_IS_ACTOR (self)' failed

  after :

  gnome-shell[1755]: value "nan" of type 'gfloat' is invalid or out of
  range for property 'y' of type 'gfloat' (massive amount of log lines)

  gnome-shell[1755]: clutter_actor_allocate: assertion '!isnan 
(real_allocation.x1) && !isnan (real_allocation.x2) && !isnan 
(real_allocation.y1) && !isnan (real_allocation.y2)' failed
  gnome-shell[1755]: Can't update stage views actor unnamed [ClutterActor] is 
on because it needs an allocation.
  gnome-shell[1755]: Can't update stage views actor unnamed [ClutterActor] is 
on because it needs an allocation.

  I add the journal.txt file to the report

  ProblemType: Bug
  DistroRelease: Ubuntu 25.04
  Package: gnome-shell 48~beta-3ubuntu1
  ProcVersionSignature: Ubuntu 6.12.0-15.15-generic 6.12.11
  Uname: Linux 6.12.0-15-generic x86_64
  ApportVersion: 2.31.0+git20250220-0ubuntu2
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Feb 24 20:15:32 2025
  DisplayManager: gdm3
  InstallationDate: Installed on 2025-02-23 (1 days ago)
  InstallationMedia: Ubuntu 24.10 "Oracular Oriole" - Release amd64 (20241009.4)
  ProcEnviron:
   LANG=fr_FR.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  RelatedPackageVersions: mutter-common 48~beta-4ubuntu1
  SourcePackage: gnome-shell
  UpgradeStatus: Upgraded to plucky on 2025-02-23 (1 days ago)

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