Bug 514310 - Kwin crashes after change KDE themes
Summary: Kwin crashes after change KDE themes
Status: RESOLVED DOWNSTREAM
Alias: None
Product: kwin
Classification: Plasma
Component: general (other bugs)
Version First Reported In: 5.27.11
Platform: Pop!_OS Linux
: NOR crash
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords: drkonqi
Depends on:
Blocks:
 
Reported: 2026-01-08 08:34 UTC by Javier Pizarro
Modified: 2026-01-08 09:33 UTC (History)
0 users

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Sentry Crash Report:

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Description Javier Pizarro 2026-01-08 08:34:11 UTC 
Application: kwin_x11 (5.27.11)

Qt Version: 5.15.13
Frameworks Version: 5.115.0
Operating System: Linux 6.17.9-76061709-generic x86_64
Windowing System: X11
Distribution: Pop!_OS 24.04 LTS
DrKonqi: 5.27.11 [KCrashBackend]

-- Information about the crash:
As i installed a new theme for KDE Plasma 5, and i applied the theme, KWin crashes without automatically restarting KWin. It's the first time happening this.

The reporter is unsure if this crash is reproducible.

-- Backtrace:
Application: KWin (kwin_x11), signal: Aborted

[KCrash Handler]
#4  __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:44
#5  __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78
#6  __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ./nptl/pthread_kill.c:89
#7  0x0000747b9a84527e in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#8  0x0000747b9a8288ff in __GI_abort () at ./stdlib/abort.c:79
#9  0x0000747b99855f32 in ??? () at /lib/x86_64-linux-gnu/libdbus-1.so.3
#10 0x0000747b9987e310 in _dbus_warn_check_failed () at /lib/x86_64-linux-gnu/libdbus-1.so.3
#11 0x0000747b9af2d009 in ??? () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#12 0x0000747b9af2f34f in ??? () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#13 0x0000747b9af3037a in ??? () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#14 0x0000747b9bd06343 in QObject::event(QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x0000747b9bcd80e6 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x0000747b9bcdb94b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x0000747b9bd35c0f in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x0000747b99514535 in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x0000747b99573767 in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x0000747b995139d3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x0000747b9bd35279 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x0000747b9bcd6a7b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x0000747b9bada36b in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x0000747b9af1815b in ??? () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#25 0x0000747b9badb674 in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x0000747b9a89caa4 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:447
#27 0x0000747b9a929c6c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 4 (Thread 0x747b82bfe6c0 (LWP 30450) "QQmlThread"):
#1  0x0000747b995736be in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x0000747b995139d3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x0000747b9bd35296 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x0000747b9bcd6a7b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x0000747b9bada36b in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x0000747b9cb410ca in ??? () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x0000747b9badb674 in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x0000747b9a89caa4 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:447
#9  0x0000747b9a929c6c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 3 (Thread 0x747b73fff6c0 (LWP 30457) "vsync event mon"):
#1  0x0000747b995736be in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x0000747b995139d3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x0000747b9bd35296 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x0000747b9bcd6a7b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x0000747b9bada36b in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x0000747b9badb674 in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x0000747b9a89caa4 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:447
#8  0x0000747b9a929c6c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 2 (Thread 0x747b6b9fd6c0 (LWP 30459) "CPMMListener"):
#1  ___pthread_mutex_unlock (mutex=0x747b8ff58b60) at ./nptl/pthread_mutex_unlock.c:368
#2  0x0000747b8e6187f5 in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.580.82.09
#3  0x0000747b8e618afa in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.580.82.09
#4  0x0000747b8e607764 in ??? () at /lib/x86_64-linux-gnu/libnvidia-glcore.so.580.82.09
#5  0x0000747b9a89caa4 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:447
#6  0x0000747b9a929c6c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 1 (Thread 0x747b96a87e80 (LWP 30444) "kwin"):
#1  0x0000747b9badd7db in QSemaphore::acquire(int) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x0000747b9bd12b75 in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x0000747b9af17ad4 in ??? () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#4  0x0000747b9af23e73 in ??? () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#5  0x0000747b9af24a2d in ??? () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#6  0x0000747b9af19e2b in QDBusConnection::connect(QString const&, QString const&, QString const&, QString const&, QString const&, QObject*, char const*) () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x0000747b8838faa5 in ??? () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/breezedecoration.so
#8  0x0000747b9d5f12a8 in KWin::Decoration::DecorationBridge::createDecoration(KWin::Window*) () at /lib/x86_64-linux-gnu/libkwin.so.5
#9  0x0000747b9d7319c9 in KWin::X11Window::createDecoration(QRectF const&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#10 0x0000747b9d731fdd in KWin::X11Window::updateDecoration(bool, bool) () at /lib/x86_64-linux-gnu/libkwin.so.5
#11 0x0000747b9d734efb in KWin::X11Window::manage(unsigned int, bool) () at /lib/x86_64-linux-gnu/libkwin.so.5
#12 0x0000747b9d7129f8 in KWin::Workspace::createX11Window(unsigned int, bool) () at /lib/x86_64-linux-gnu/libkwin.so.5
#13 0x0000747b9d6185f5 in KWin::Workspace::workspaceEvent(xcb_generic_event_t*) () at /lib/x86_64-linux-gnu/libkwin.so.5
#14 0x0000747b9bcd54af in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x0000747b958d3086 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#16 0x0000747b958d479f in QXcbConnection::processXcbEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#17 0x0000747b958fccff in ??? () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#18 0x0000747b99514535 in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x0000747b99573767 in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x0000747b995139d3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x0000747b9bd35279 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x0000747b9bcd6a7b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x0000747b9bcdf3e8 in QCoreApplication::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x000063677ca83ba1 in ??? ()
#25 0x0000747b9a82a1ca in __libc_start_call_main (main=main@entry=0x63677ca834f0, argc=argc@entry=1, argv=argv@entry=0x7ffc25b217a8) at ../sysdeps/nptl/libc_start_call_main.h:58
#26 0x0000747b9a82a28b in __libc_start_main_impl (main=0x63677ca834f0, argc=1, argv=0x7ffc25b217a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc25b21798) at ../csu/libc-start.c:360
#27 0x000063677ca850e5 in ??? ()
[Inferior 1 (process 30444) detached]

Reported using DrKonqi
Comment 1 Bug Janitor Service 2026-01-08 09:33:43 UTC 
Thank you for the bug report!

However Plasma 5.27.11 no longer receives updates or maintenance from KDE; active versions are 6.4 or newer. Please upgrade to an active version as soon as your distribution makes it available to you. Plasma is a fast-moving project, and bugs in one version are often fixed in the next one.

If you need help with Plasma 5.27.11, please contact your distribution, who bears the responsibility of providing help for older releases that are no longer receiving updates from KDE.

If you can reproduce the issue after upgrading to an active version, feel free to re-open this bug report.