GNOME Shell locking hard when Telegram opens a full-screen photo

[Michał Sawicz]

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)

[Daniel van Vugt (vanvugt)]

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

[Michał Sawicz (saviq)]

It's hung, if I press Esc soon enough, it will recover within a few seconds. But in the mean time it's looping on CPU.

[Daniel van Vugt (vanvugt)]

I have seen a freeze myself when entering full screen. And another one is being tracked in:
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1441#note_1876038

[Daniel van Vugt (vanvugt)]

Try setting MUTTER_DEBUG_DISABLE_HW_CURSORS=1 in /etc/environment

[Daniel van Vugt (vanvugt)]

I can't seem to reproduce any freezes using telegram-desktop and 23.10. If it still happens for you then please try the suggestion in comment #5.

[Launchpad Janitor (janitor)]

[Expired for gnome-shell (Ubuntu) because there has been no activity for 60 days.]