Public bug reported:
[System Information]
OS: Kubuntu (Plasma 6)
Session Type: Wayland (or X11)
Display Manager: SDDM
[Steps to Reproduce]
1. System has only one primary user account.
2. Create a secondary user via CLI (sudo adduser <name>).
3. Immediately click Application Launcher -> Leave -> Switch User without
logging out or rebooting.
[Expected Behavior]
The display manager greeter appears displaying both user accounts, or prompts
to unlock/switch sessions without freezing.
[Actual Behavior]
The entire desktop locks up and freezes on the first attempt. Switching user
only functions properly after a complete system restart.
[Additional Context]
The issue appears linked to AccountsService/SDDM not updating active session
targets dynamically after user creation until a clean reboot occurs.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: sddm 0.21.0+git20250502.4fe234b-2ubuntu3
ProcVersionSignature: Ubuntu 7.0.0-31.31-generic 7.0.14
Uname: Linux 7.0.0-31-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Sat Sep 12 13:11:21 2026
InstallationDate: Installed on 2026-09-07 (5 days ago)
InstallationMedia: Kubuntu 26.04.1 LTS "Resolute Raccoon" - Release amd64
(20260826.1)
SourcePackage: sddm
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: sddm (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2167155
Title:
SDDM/Plasma freezes when clicking Switch User immediately after
creating a new user (resolved only by reboot)
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