Desktop lock-screen is bypassed after switching to virtual tty on console

[Richard A. DeMattia]

Expected to have to provide session user password to return to GUI desktop after locking that session via the task-bar power-button dropdown -> Lock button.

Actually was able to resume GUI session without providing a password.

Steps to reproduce:
 In desktop session, mouse-click the task bar power icon to show its dropdown, and select Lock
  Desktop session locks and displays a password prompt box.
 Press CTL-ALT-F1 to show virtual console tty1
 Press CTL-ALT-F6 to return to GUI.
 GUI is restored without prompting for a password.

Repeatable with other virtual consoles (F2 F3 etc.)

Repeatable whether or not I logged in on the virtual console or just switched to it then back to the GUI.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: gnome-shell 42.9-0ubuntu2
ProcVersionSignature: Ubuntu 5.15.0-92.102-generic 5.15.131
Uname: Linux 5.15.0-92-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Fri Feb 9 14:06:32 2024
DisplayManager: lightdm
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: mutter-common 42.9-0ubuntu5
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to jammy on 2022-08-12 (545 days ago)

[Richard A. DeMattia (rademattia)]

Correction CTRL-ALT-F7 to restore the GUI desktop.

[Daniel van Vugt (vanvugt)]

Thanks for the bug report. I'm not sure if your using lightdm is a factor here (jammy should be using gdm3 instead). But the first thing we should check is to see if gnome-shell crashed and restarted. Please follow the steps in: https://wiki.ubuntu.com/Bugs/Responses#Missing_a_crash_report_or_having_a_.crash_attachment

Separately please also:

 * Try: gnome-extensions disable '<email address hidden>'

 * Log another bug about the repeating log message: "Failed to create offscreen effect framebuffer: Failed to create an OpenGL framebuffer object".

[Launchpad Janitor (janitor)]

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