Can you ssh in to find out if gnome-shell is hung or crashed? If crashed then:
https://wiki.ubuntu.com/Bugs/Responses#Missing_a_crash_report_or_having_a_.crash_attachment ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete -- 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/2039045 Title: GNOME Shell locking hard when Telegram opens a full-screen photo Status in gnome-shell package in Ubuntu: Incomplete Bug description: Steps: - run https://snapcraft.io/telegram-desktop - open a full-screen image preview Expected: - the image preview opens - and can be closed Current: - the image preview opens - the shell becomes unresponsive Often it's possible to wait a few seconds to close the preview again, but sometimes it just locks up hard with no way to recover. ProblemType: Bug DistroRelease: Ubuntu 23.10 Package: gnome-shell 45.0-1ubuntu2 ProcVersionSignature: Ubuntu 6.5.0-9.9-generic 6.5.3 Uname: Linux 6.5.0-9-generic x86_64 NonfreeKernelModules: zfs ApportVersion: 2.27.0-0ubuntu5 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Wed Oct 11 14:30:31 2023 DisplayManager: gdm3 InstallationDate: Installed on 2023-10-06 (5 days ago) InstallationMedia: Ubuntu 23.10 "Mantic Minotaur" - Daily amd64 (20231004) ProcEnviron: LANG=pl_PL.UTF-8 PATH=(custom, no user) SHELL=/usr/bin/zsh TERM=screen-256color XDG_RUNTIME_DIR=<set> RelatedPackageVersions: mutter-common 45.0-3ubuntu3 SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2039045/+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