Public bug reported:
Description: Ubuntu 26.04 LTS
Release: 26.04
plasma-workspace:
Installed: 4:6.6.5-0ubuntu0.1
Candidate: 4:6.6.5-0ubuntu0.1
Version table:
*** 4:6.6.5-0ubuntu0.1 500 (phased 50%)
500 http://archive.ubuntu.com/ubuntu resolute-updates/universe amd64
Packages
100 /var/lib/dpkg/status
4:6.6.4-0ubuntu2 500
500 http://archive.ubuntu.com/ubuntu resolute/universe amd64 Packages
Environment
Kubuntu 26.04
Plasma 6.6.5
Qt 6.10.2
AMD Radeon RX 7800 XT (amdgpu)
Fully updated
Steps to reproduce
Fresh install Kubuntu 26.04.
Log into Plasma (Wayland).
Enable any splash screen.
Log out and back in.
Expected result
With a splash screen enabled, after entering the password, the splash
screen should disappear once Plasma has finished loading (approximately
4 seconds on this system), allowing the desktop to become usable.
Actual result
Splash remains visible for almost exactly 30 seconds before disappearing.
During this time keyboard input is blocked.
For "Progress bar" Splashes like Oxygen, it is stuck at the 80% mark from the
moment it appears till it disappears, with no movement the entire time.
When the splash screen is disabled, login consistently completes in
approximately 4 seconds.
Additional observations
Reproduces 100% every login.
Reproduces with Breeze and Oxygen splash themes.
Reproduces on a completely fresh installation.
systemd-analyze --user critical-chain shows no user services taking a
significant amount of time to start.
Logging into Plasma (X11) instead of Plasma (Wayland) fixes the problem
completely. The splash lasts less than one second and the desktop login sound
plays normally.
Additionally, on Wayland, the desktop login sound is never played. On
X11, it plays normally during login. This appears to coincide with the
splash screen disappearing immediately on X11
I also tested the workaround proposed in KDE Bug 494840. It had no
effect on this issue. https://bugs.kde.org/show_bug.cgi?id=494840
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: plasma-workspace 4:6.6.5-0ubuntu0.1
ProcVersionSignature: Ubuntu 7.0.0-27.27-generic 7.0.6
Uname: Linux 7.0.0-27-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Thu Jul 2 01:37:40 2026
InstallationDate: Installed on 2026-07-01 (0 days ago)
InstallationMedia: Kubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423)
SourcePackage: plasma-workspace
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: plasma-workspace (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2158921
Title:
On fresh Kubuntu 26.04 installation, KSplash is consistently delayed
by ~30 seconds before disappearing on Plasma Wayland; X11 is
unaffected
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