Super + L doesn't work

[Galacticalcat]

 Neither does changing the shortkey to the lockscreen. In the journalctl I get this: Couldn't lock screen: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: GDBus.Error:org.freedesktop.DBuscreen: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.Shell.ScreenShield was not provided by any .service fError.ServiceUnknown: The name org.gnome.Shell.ScreenShield was not provided by any .service files

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: gnome-screensaver 3.6.1-13ubuntu1
ProcVersionSignature: Ubuntu 5.15.0-48.54-generic 5.15.53
Uname: Linux 5.15.0-48-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed Sep 21 12:04:17 2022
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GsettingsGnomeSession:
 org.gnome.desktop.session idle-delay uint32 300
 org.gnome.desktop.session session-name 'ubuntu'
InstallationDate: Installed on 2022-08-16 (35 days ago)
InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1)
SourcePackage: gnome-screensaver
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Harro Mirbach (harro-mirbach)]

This bug affects not only the Super-L key.
Lock screen doesn't work at all:
- resuming from hibernating will come back with unlocked session
- resuming from suspend to RAM will come back with unlocked session

It happens after the upgrade from focal to jammy and aswell after a complete new installation of jammy.

syslog has this ERROR message:
Sep 21 14:48:37 ultrabook budgie-panel[2492]: UserIndicatorWindow.vala:379: Cannot lock screen: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.Shell.ScreenShield was not provided by any .service files

[Galacticalcat (anongalacticalcat)]

I can confirm what you said. However, I didn't have this problem after installing my Ubuntu. It started randomly (probably after an update). Is there a solution to it, other than reinstalling my Ubuntu?

[ubuntu.zl5qs (ubuntuzl5qs)]

I found this thread: https://discuss.getsol.us/d/6970-cant-lock-my-screen/2

I too had gnome-shell installed (must have come with the upgrade to jammy and after removing it (apt remove gnome-shell; apt autoremove) and a reboot, I was now able to lock the screen again.

[ubuntu.zl5qs (ubuntuzl5qs)]

For info: I'm running Ubuntu Budgie