Bug 514939

Summary: kded6 crashed after waking from standby after changing the conected monitors dring standby
Product: [Frameworks and Libraries] frameworks-kded Reporter: Flupp <Flupp+bugs.kde.org>
Component: generalAssignee: KIO Bugs <kio-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: crash CC: kdelibs-bugs-null, nicolas.fella
Priority: NOR Keywords: drkonqi
Version First Reported In: 6.22.0   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Flupp 2026-01-22 16:41:30 UTC 
Application: kded6 (6.22.0)

ApplicationNotResponding [ANR]: false
Qt Version: 6.10.1
Frameworks Version: 6.22.0
Operating System: Linux 6.18.5-arch1-1 x86_64
Windowing System: Wayland
Distribution: Arch Linux
DrKonqi: 6.5.5 [CoredumpBackend]

-- Information about the crash:
I think it occurred to me already twice: Setting my laptop into standby, changing the monitor configuration (i.e., disconnecting some and connecting another external monitor), and resuming from standby seemed to trigger a crash of kded6. This time, the disconnecting part involved undocking from a docking station. I do not remember the details for the previous occurrence.

In case that’s relevant: AFAIR the laptop was a significant time in standby when this happened (> 30min).

The reporter is unsure if this crash is reproducible.

-- Backtrace:
Application: kded6 (kded6), signal: Segmentation fault


warning: Can't open file anon_inode:i915.gem during file-backed mapping note processing

warning: Can't open file /home/toni/.cache/ksycoca6_en_0gFxr6XYWp6oTIwc5SUhqUsPafw= (deleted) during file-backed mapping note processing
[New LWP 1956]
[New LWP 1975]
[New LWP 1964]
[New LWP 1961]
[New LWP 2138]
[New LWP 2129]
[New LWP 526142]
[New LWP 1963]
[New LWP 1962]
[New LWP 1978]
[New LWP 2137]
[New LWP 1958]
[New LWP 1976]
[New LWP 2115]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `/usr/bin/kded6'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f52a609890c in ?? () from /usr/lib/libc.so.6
[Current thread is 1 (Thread 0x7f52a5b939c0 (LWP 1956))]
add symbol table from file "/usr/lib/libc.so.6"
add symbol table from file "/usr/lib/libKF6Crash.so.6"
add symbol table from file "/usr/lib/qt6/plugins/kf6/kded/devicenotifications.so"
add symbol table from file "/usr/lib/libQt6Core.so.6"
add symbol table from file "/usr/lib/libffi.so.8"
add symbol table from file "/usr/lib/qt6/plugins/platforms/../../../libwayland-client.so.0"
add symbol table from file "/usr/lib/qt6/plugins/platforms/../../../libQt6WaylandClient.so.6"
add symbol table from file "/usr/lib/libQt6Widgets.so.6"
add symbol table from file "/usr/lib/libglib-2.0.so.0"
add symbol table from file "/usr/bin/kded6"
add symbol table from file "/usr/lib/libgallium-25.3.3-arch1.2.so"
add symbol table from file "/usr/lib/libQt6Network.so.6"
add symbol table from file "/usr/lib/libKF6KIOCore.so.6"
add symbol table from file "/usr/lib/libkcups.so"
add symbol table from file "/usr/lib/libpulse.so.0"
add symbol table from file "/usr/lib/pulseaudio/libpulsecommon-17.0.so"
add symbol table from file "/usr/lib/libgio-2.0.so.0"
add symbol table from file "/usr/lib/libQt6DBus.so.6"
[Current thread is 14 (Thread 0x7f527abff6c0 (LWP 2115))]

Thread 14 (Thread 0x7f527abff6c0 (LWP 2115)):
#0  0x00007f52a609efe2 in ?? () from /usr/lib/libc.so.6
#1  0x00007f52a609316c in ?? () from /usr/lib/libc.so.6
#2  0x00007f52a60931b4 in ?? () from /usr/lib/libc.so.6
#3  0x00007f52a610d4ee in poll () from /usr/lib/libc.so.6
#4  0x00007f5280378b6a in poll (__fds=0x7f525c007240, __nfds=2, __timeout=-1) at /usr/include/bits/poll2.h:44
#5  poll_func (ufds=0x7f525c007240, nfds=2, timeout=-1, userdata=0x557bd1c8ca20) at ../pulseaudio/src/pulse/thread-mainloop.c:70
#6  0x00007f5280362661 in pa_mainloop_poll (m=m@entry=0x557bd1b49c60) at ../pulseaudio/src/pulse/mainloop.c:863
#7  0x00007f528036c793 in pa_mainloop_iterate (m=m@entry=0x557bd1b49c60, block=block@entry=1, retval=retval@entry=0x0) at ../pulseaudio/src/pulse/mainloop.c:945
#8  0x00007f528036c861 in pa_mainloop_run (m=0x557bd1b49c60, retval=0x0) at ../pulseaudio/src/pulse/mainloop.c:963
#9  0x00007f528037dd32 in thread (userdata=0x557bd1c8c9d0) at ../pulseaudio/src/pulse/thread-mainloop.c:101
#10 0x00007f528032346f in internal_thread_func (userdata=0x557bd1c8d770) at ../pulseaudio/src/pulsecore/thread-posix.c:81
#11 0x00007f52a609698b in ?? () from /usr/lib/libc.so.6
#12 0x00007f52a611aa0c in ?? () from /usr/lib/libc.so.6

Thread 13 (Thread 0x7f52817fd6c0 (LWP 1976)):
#0  0x00007f52a609efe2 in ?? () from /usr/lib/libc.so.6
#1  0x00007f52a609316c in ?? () from /usr/lib/libc.so.6
#2  0x00007f52a60931b4 in ?? () from /usr/lib/libc.so.6
#3  0x00007f52a610da36 in ppoll () from /usr/lib/libc.so.6
#4  0x00007f52a62b7784 in ppoll (__fds=0x7f5274000be0, __nfds=1, __timeout=0x0, __ss=0x0) at /usr/include/bits/poll2.h:101
#5  g_main_context_poll_unlocked (priority=<optimized out>, context=0x557bd19d0850, timeout_usec=<optimized out>, fds=0x7f5274000be0, n_fds=1) at ../glib/glib/gmain.c:4811
#6  g_main_context_iterate_unlocked (context=context@entry=0x557bd19d0850, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:4485
#7  0x00007f52a62b7865 in g_main_context_iteration (context=0x557bd19d0850, may_block=may_block@entry=1) at ../glib/glib/gmain.c:4556
#8  0x00007f52a62b78b2 in glib_worker_main (data=<optimized out>) at ../glib/glib/gmain.c:6764
#9  0x00007f52a62ee8bc in g_thread_proxy (data=0x557bd1b34550) at ../glib/glib/gthread.c:893
#10 0x00007f52a609698b in ?? () from /usr/lib/libc.so.6
#11 0x00007f52a611aa0c in ?? () from /usr/lib/libc.so.6

Thread 12 (Thread 0x7f52a2cf66c0 (LWP 1958)):
#0  0x00007f52a609efe2 in ?? () from /usr/lib/libc.so.6
#1  0x00007f52a609316c in ?? () from /usr/lib/libc.so.6
#2  0x00007f52a60931b4 in ?? () from /usr/lib/libc.so.6
#3  0x00007f52a610da36 in ppoll () from /usr/lib/libc.so.6
#4  0x00007f52a62b7784 in ppoll (__fds=0x557bd1c47c50, __nfds=5, __timeout=0x0, __ss=0x0) at /usr/include/bits/poll2.h:101
#5  g_main_context_poll_unlocked (priority=<optimized out>, context=0x7f529c000d00, timeout_usec=<optimized out>, fds=0x557bd1c47c50, n_fds=5) at ../glib/glib/gmain.c:4811
#6  g_main_context_iterate_unlocked (context=context@entry=0x7f529c000d00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:4485
#7  0x00007f52a62b7865 in g_main_context_iteration (context=0x7f529c000d00, may_block=1) at ../glib/glib/gmain.c:4556
#8  0x00007f52a6c48152 in QEventDispatcherGlib::processEvents (this=0x7f529c000be0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:399
#9  0x00007f52a6975786 in QEventLoop::processEvents (this=0x7f52a2cf5af0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:104
#10 QEventLoop::exec (this=0x7f52a2cf5af0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:186
#11 0x00007f52a6a9041e in QThread::exec (this=this@entry=0x7f52a7a01e20 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager> >::instance()::holder>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread.cpp:672
#12 0x00007f52a797903e in QDBusConnectionManager::run (this=0x7f52a7a01e20 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager> >::instance()::holder>) at /usr/src/debug/qt6-base/qtbase/src/dbus/qdbusconnectionmanager.cpp:145
#13 0x00007f52a6b2f899 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:437
#14 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:367
#15 QThreadPrivate::start (arg=0x7f52a7a01e20 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager> >::instance()::holder>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:397
#16 0x00007f52a609698b in ?? () from /usr/lib/libc.so.6
#17 0x00007f52a611aa0c in ?? () from /usr/lib/libc.so.6

Thread 11 (Thread 0x7f52793586c0 (LWP 2137)):
#0  0x00007f52a609efe2 in ?? () from /usr/lib/libc.so.6
#1  0x00007f52a609316c in ?? () from /usr/lib/libc.so.6
#2  0x00007f52a60931b4 in ?? () from /usr/lib/libc.so.6
#3  0x00007f52a610da36 in ppoll () from /usr/lib/libc.so.6
#4  0x00007f52a6b26313 in ppoll (__fds=<optimized out>, __nfds=<optimized out>, __timeout=<optimized out>, __ss=<optimized out>) at /usr/include/bits/poll2.h:101
#5  qt_ppoll (fds=0x7f52793578b0, nfds=1, timeout_ts=0x0) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcore_unix.cpp:103
#6  qt_ppoll (fds=0x7f52793578b0, nfds=1, timeout_ts=0x0) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcore_unix.cpp:100
#7  qt_safe_poll (deadline=..., fds=<optimized out>, nfds=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcore_unix.cpp:126
#8  qt_safe_poll (fds=fds@entry=0x7f52793578b0, nfds=nfds@entry=1, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcore_unix.cpp:121
#9  0x00007f52a09680c3 in QNativeSocketEnginePrivate::nativeSelect (this=<optimized out>, deadline=..., checkRead=<optimized out>, checkWrite=<optimized out>, selectForRead=0x7f52793579af, selectForWrite=0x7f52793579ae) at /usr/src/debug/qt6-base/qtbase/src/network/socket/qnativesocketengine_unix.cpp:1421
#10 0x00007f52a08e3520 in QNativeSocketEngine::waitForReadOrWrite (this=0x7f5258003090, readyToRead=<optimized out>, readyToWrite=<optimized out>, checkRead=<optimized out>, checkWrite=<optimized out>, deadline=..., timedOut=0x0) at /usr/src/debug/qt6-base/qtbase/src/network/socket/qnativesocketengine.cpp:1088
#11 0x00007f52a08d95ff in QAbstractSocket::waitForReadyRead (this=0x7f5258002488, msecs=-1) at /usr/src/debug/qt6-base/qtbase/src/network/socket/qabstractsocket.cpp:2176
#12 0x00007f52a1fe621a in KIO::ConnectionBackend::waitForIncomingTask (this=0x7f5258001fc0, ms=-1) at /usr/src/debug/kio/kio-6.22.0/src/core/connectionbackend.cpp:153
#13 0x00007f52a202d63b in KIO::Connection::waitForIncomingTask (this=<optimized out>, ms=-1) at /usr/src/debug/kio/kio-6.22.0/src/core/connection.cpp:214
#14 KIO::SlaveBase::dispatchLoop() [clone .constprop.0] (this=0x7f5258001490) at /usr/src/debug/kio/kio-6.22.0/src/core/slavebase.cpp:320
#15 0x00007f52a20bd0ab in KIO::WorkerThread::run (this=0x557bd1c77fb0) at /usr/src/debug/kio/kio-6.22.0/src/core/workerthread.cpp:47
#16 0x00007f52a6b2f899 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:437
#17 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:367
#18 QThreadPrivate::start (arg=0x557bd1c77fb0) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:397
#19 0x00007f52a609698b in ?? () from /usr/lib/libc.so.6
#20 0x00007f52a611aa0c in ?? () from /usr/lib/libc.so.6

Thread 10 (Thread 0x7f5280ffc6c0 (LWP 1978)):
#0  0x00007f52a609efe2 in ?? () from /usr/lib/libc.so.6
#1  0x00007f52a609316c in ?? () from /usr/lib/libc.so.6
#2  0x00007f52a60931b4 in ?? () from /usr/lib/libc.so.6
#3  0x00007f52a610da36 in ppoll () from /usr/lib/libc.so.6
#4  0x00007f52a62b7784 in ppoll (__fds=0x7f526c000c20, __nfds=3, __timeout=0x0, __ss=0x0) at /usr/include/bits/poll2.h:101
#5  g_main_context_poll_unlocked (priority=<optimized out>, context=0x557bd19d0920, timeout_usec=<optimized out>, fds=0x7f526c000c20, n_fds=3) at ../glib/glib/gmain.c:4811
#6  g_main_context_iterate_unlocked (context=0x557bd19d0920, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:4485
#7  0x00007f52a62b7a17 in g_main_loop_run (loop=0x557bd1b3e600) at ../glib/glib/gmain.c:4695
#8  0x00007f5299f482e4 in gdbus_shared_thread_func (user_data=0x557bd1b3fdb0) at ../glib/gio/gdbusprivate.c:284
#9  0x00007f52a62ee8bc in g_thread_proxy (data=0x557bd1b3e620) at ../glib/glib/gthread.c:893
#10 0x00007f52a609698b in ?? () from /usr/lib/libc.so.6
#11 0x00007f52a611aa0c in ?? () from /usr/lib/libc.so.6

Thread 9 (Thread 0x7f52994496c0 (LWP 1962)):
#0  0x00007f52a609efe2 in ?? () from /usr/lib/libc.so.6
#1  0x00007f52a609316c in ?? () from /usr/lib/libc.so.6
#2  0x00007f52a60931b4 in ?? () from /usr/lib/libc.so.6
#3  0x00007f52a610d4ee in poll () from /usr/lib/libc.so.6
#4  0x00007f52a2d62db5 in poll (__fds=0x7f5299448b40, __nfds=2, __timeout=-1) at /usr/include/bits/poll2.h:44
#5  QtWaylandClient::EventThread::run (this=0x557bd176eed0) at /usr/src/debug/qt6-base/qtbase/src/plugins/platforms/wayland/qwaylanddisplay.cpp:185
#6  0x00007f52a6b2f899 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:437
#7  (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:367
#8  QThreadPrivate::start (arg=0x557bd176eed0) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:397
#9  0x00007f52a609698b in ?? () from /usr/lib/libc.so.6
#10 0x00007f52a611aa0c in ?? () from /usr/lib/libc.so.6

Thread 8 (Thread 0x7f5290bff6c0 (LWP 1963)):
#0  0x00007f52a609efe2 in ?? () from /usr/lib/libc.so.6
#1  0x00007f52a609316c in ?? () from /usr/lib/libc.so.6
#2  0x00007f52a60937dc in ?? () from /usr/lib/libc.so.6
#3  0x00007f52a6095e9e in pthread_cond_wait () from /usr/lib/libc.so.6
#4  0x00007f52911e5eee in ?? () from /usr/lib/libgallium-25.3.3-arch1.2.so
#5  0x00007f529119b2bd in ?? () from /usr/lib/libgallium-25.3.3-arch1.2.so
#6  0x00007f52911e5e1d in ?? () from /usr/lib/libgallium-25.3.3-arch1.2.so
#7  0x00007f52a609698b in ?? () from /usr/lib/libc.so.6
#8  0x00007f52a611aa0c in ?? () from /usr/lib/libc.so.6

Thread 7 (Thread 0x7f524bfff6c0 (LWP 526142)):
#0  0x00007f52a609efe2 in ?? () from /usr/lib/libc.so.6
#1  0x00007f52a609316c in ?? () from /usr/lib/libc.so.6
#2  0x00007f52a60931b4 in ?? () from /usr/lib/libc.so.6
#3  0x00007f52a610d4ee in poll () from /usr/lib/libc.so.6
#4  0x00007f5280378b6a in poll (__fds=0x7f5264000e70, __nfds=2, __timeout=-1) at /usr/include/bits/poll2.h:44
#5  poll_func (ufds=0x7f5264000e70, nfds=2, timeout=-1, userdata=0x557bd1cfff40) at ../pulseaudio/src/pulse/thread-mainloop.c:70
#6  0x00007f5280362661 in pa_mainloop_poll (m=m@entry=0x7f529c02a780) at ../pulseaudio/src/pulse/mainloop.c:863
#7  0x00007f528036c793 in pa_mainloop_iterate (m=m@entry=0x7f529c02a780, block=block@entry=1, retval=retval@entry=0x0) at ../pulseaudio/src/pulse/mainloop.c:945
#8  0x00007f528036c861 in pa_mainloop_run (m=0x7f529c02a780, retval=0x0) at ../pulseaudio/src/pulse/mainloop.c:963
#9  0x00007f528037dd32 in thread (userdata=0x557bd1e72280) at ../pulseaudio/src/pulse/thread-mainloop.c:101
#10 0x00007f528032346f in internal_thread_func (userdata=0x557bd1e74980) at ../pulseaudio/src/pulsecore/thread-posix.c:81
#11 0x00007f52a609698b in ?? () from /usr/lib/libc.so.6
#12 0x00007f52a611aa0c in ?? () from /usr/lib/libc.so.6

Thread 6 (Thread 0x7f5279b596c0 (LWP 2129)):
#0  0x00007f52a609efe2 in ?? () from /usr/lib/libc.so.6
#1  0x00007f52a609316c in ?? () from /usr/lib/libc.so.6
#2  0x00007f52a60931b4 in ?? () from /usr/lib/libc.so.6
#3  0x00007f52a610da36 in ppoll () from /usr/lib/libc.so.6
#4  0x00007f52a62b7784 in ppoll (__fds=0x7f5254006b00, __nfds=1, __timeout=0x7f5279b58950, __ss=0x0) at /usr/include/bits/poll2.h:101
#5  g_main_context_poll_unlocked (priority=<optimized out>, context=0x7f5254000d00, timeout_usec=<optimized out>, fds=0x7f5254006b00, n_fds=1) at ../glib/glib/gmain.c:4811
#6  g_main_context_iterate_unlocked (context=context@entry=0x7f5254000d00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:4485
#7  0x00007f52a62b7865 in g_main_context_iteration (context=0x7f5254000d00, may_block=1) at ../glib/glib/gmain.c:4556
#8  0x00007f52a6c48152 in QEventDispatcherGlib::processEvents (this=0x7f5254000be0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:399
#9  0x00007f52a6975786 in QEventLoop::processEvents (this=0x7f5279b58ad0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:104
#10 QEventLoop::exec (this=0x7f5279b58ad0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:186
#11 0x00007f52a6a9041e in QThread::exec (this=this@entry=0x557bd1cdf8d0) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread.cpp:672
#12 0x00007f527a3b1cf9 in KCupsConnection::run (this=0x557bd1cdf8d0) at /usr/src/debug/print-manager/print-manager-6.5.5/src/libkcups/KCupsConnection.cpp:212
#13 0x00007f52a6b2f899 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:437
#14 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:367
#15 QThreadPrivate::start (arg=0x557bd1cdf8d0) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:397
#16 0x00007f52a609698b in ?? () from /usr/lib/libc.so.6
#17 0x00007f52a611aa0c in ?? () from /usr/lib/libc.so.6

Thread 5 (Thread 0x7f5278b576c0 (LWP 2138)):
#0  0x00007f52a609efe2 in ?? () from /usr/lib/libc.so.6
#1  0x00007f52a609316c in ?? () from /usr/lib/libc.so.6
#2  0x00007f52a60931b4 in ?? () from /usr/lib/libc.so.6
#3  0x00007f52a610da36 in ppoll () from /usr/lib/libc.so.6
#4  0x00007f52a6b26313 in ppoll (__fds=<optimized out>, __nfds=<optimized out>, __timeout=<optimized out>, __ss=<optimized out>) at /usr/include/bits/poll2.h:101
#5  qt_ppoll (fds=0x7f5278b568b0, nfds=1, timeout_ts=0x0) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcore_unix.cpp:103
#6  qt_ppoll (fds=0x7f5278b568b0, nfds=1, timeout_ts=0x0) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcore_unix.cpp:100
#7  qt_safe_poll (deadline=..., fds=<optimized out>, nfds=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcore_unix.cpp:126
#8  qt_safe_poll (fds=fds@entry=0x7f5278b568b0, nfds=nfds@entry=1, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcore_unix.cpp:121
#9  0x00007f52a09680c3 in QNativeSocketEnginePrivate::nativeSelect (this=<optimized out>, deadline=..., checkRead=<optimized out>, checkWrite=<optimized out>, selectForRead=0x7f5278b569af, selectForWrite=0x7f5278b569ae) at /usr/src/debug/qt6-base/qtbase/src/network/socket/qnativesocketengine_unix.cpp:1421
#10 0x00007f52a08e3520 in QNativeSocketEngine::waitForReadOrWrite (this=0x7f524c002f80, readyToRead=<optimized out>, readyToWrite=<optimized out>, checkRead=<optimized out>, checkWrite=<optimized out>, deadline=..., timedOut=0x0) at /usr/src/debug/qt6-base/qtbase/src/network/socket/qnativesocketengine.cpp:1088
#11 0x00007f52a08d95ff in QAbstractSocket::waitForReadyRead (this=0x7f524c002488, msecs=-1) at /usr/src/debug/qt6-base/qtbase/src/network/socket/qabstractsocket.cpp:2176
#12 0x00007f52a1fe621a in KIO::ConnectionBackend::waitForIncomingTask (this=0x7f524c001fc0, ms=-1) at /usr/src/debug/kio/kio-6.22.0/src/core/connectionbackend.cpp:153
#13 0x00007f52a202d63b in KIO::Connection::waitForIncomingTask (this=<optimized out>, ms=-1) at /usr/src/debug/kio/kio-6.22.0/src/core/connection.cpp:214
#14 KIO::SlaveBase::dispatchLoop() [clone .constprop.0] (this=0x7f524c001490) at /usr/src/debug/kio/kio-6.22.0/src/core/slavebase.cpp:320
#15 0x00007f52a20bd0ab in KIO::WorkerThread::run (this=0x557bd1c0dca0) at /usr/src/debug/kio/kio-6.22.0/src/core/workerthread.cpp:47
#16 0x00007f52a6b2f899 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:437
#17 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:367
#18 QThreadPrivate::start (arg=0x557bd1c0dca0) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:397
#19 0x00007f52a609698b in ?? () from /usr/lib/libc.so.6
#20 0x00007f52a611aa0c in ?? () from /usr/lib/libc.so.6

Thread 4 (Thread 0x7f5299c4a6c0 (LWP 1961)):
#0  0x00007f52a609efe2 in ?? () from /usr/lib/libc.so.6
#1  0x00007f52a609316c in ?? () from /usr/lib/libc.so.6
#2  0x00007f52a60937dc in ?? () from /usr/lib/libc.so.6
#3  0x00007f52a6095e9e in pthread_cond_wait () from /usr/lib/libc.so.6
#4  0x00007f52a6b33e69 in QWaitConditionPrivate::wait (this=0x557bd1883510, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:68
#5  QWaitCondition::wait (this=this@entry=0x557bd177b090, mutex=mutex@entry=0x557bd177b088, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qwaitcondition_unix.cpp:146
#6  0x00007f52a2d62d49 in QtWaylandClient::EventThread::waitForReading (this=0x557bd177b050) at /usr/src/debug/qt6-base/qtbase/src/plugins/platforms/wayland/qwaylanddisplay.cpp:219
#7  QtWaylandClient::EventThread::run (this=0x557bd177b050) at /usr/src/debug/qt6-base/qtbase/src/plugins/platforms/wayland/qwaylanddisplay.cpp:180
#8  0x00007f52a6b2f899 in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:437
#9  (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:367
#10 QThreadPrivate::start (arg=0x557bd177b050) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:397
#11 0x00007f52a609698b in ?? () from /usr/lib/libc.so.6
#12 0x00007f52a611aa0c in ?? () from /usr/lib/libc.so.6

Thread 3 (Thread 0x7f52827ff6c0 (LWP 1964)):
#0  0x00007f52a609efe2 in ?? () from /usr/lib/libc.so.6
#1  0x00007f52a609316c in ?? () from /usr/lib/libc.so.6
#2  0x00007f52a60937dc in ?? () from /usr/lib/libc.so.6
#3  0x00007f52a6095e9e in pthread_cond_wait () from /usr/lib/libc.so.6
#4  0x00007f52911e5eee in ?? () from /usr/lib/libgallium-25.3.3-arch1.2.so
#5  0x00007f529119b2bd in ?? () from /usr/lib/libgallium-25.3.3-arch1.2.so
#6  0x00007f52911e5e1d in ?? () from /usr/lib/libgallium-25.3.3-arch1.2.so
#7  0x00007f52a609698b in ?? () from /usr/lib/libc.so.6
#8  0x00007f52a611aa0c in ?? () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7f5281ffe6c0 (LWP 1975)):
#0  0x00007f52a611876d in syscall () from /usr/lib/libc.so.6
#1  0x00007f52a62e682e in g_cond_wait_impl (cond=0x557bd1b342c8, mutex=0x557bd1b342c0) at ../glib/glib/gthread-posix.c:1026
#2  g_cond_wait (cond=0x557bd1b342c8, mutex=0x557bd1b342c0) at ../glib/glib/gthread.c:1686
#3  0x00007f52a627d1cd in g_async_queue_pop_intern_unlocked (queue=0x557bd1b342c0, wait=1, end_time=-1) at ../glib/glib/gasyncqueue.c:376
#4  0x00007f52a62ef487 in g_thread_pool_spawn_thread (data=<optimized out>) at ../glib/glib/gthreadpool.c:297
#5  0x00007f52a62ee8bc in g_thread_proxy (data=0x557bd1b34310) at ../glib/glib/gthread.c:893
#6  0x00007f52a609698b in ?? () from /usr/lib/libc.so.6
#7  0x00007f52a611aa0c in ?? () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7f52a5b939c0 (LWP 1956)):
[KCrash Handler]
#4  QArrayDataPointer<char16_t>::QArrayDataPointer (this=0x7ffc99f958b0, other=...) at /usr/include/qt6/QtCore/qarraydatapointer.h:37
#5  QString::QString (this=0x7ffc99f958b0, other=...) at /usr/include/qt6/QtCore/qstring.h:1355
#6  Output::uuid (this=0x0) at /usr/src/debug/plasma-workspace/plasma-workspace-6.5.5/devicenotifications/devicenotifications.h:93
#7  operator() (__closure=0x557bd1eba710) at /usr/src/debug/plasma-workspace/plasma-workspace-6.5.5/devicenotifications/devicenotifications.cpp:328
#8  operator() (__closure=<optimized out>) at /usr/include/qt6/QtCore/qobjectdefs_impl.h:116
#9  QtPrivate::FunctorCallBase::call_internal<void, QtPrivate::FunctorCall<std::integer_sequence<long unsigned int>, QtPrivate::List<>, void, KdedDeviceNotifications::setupWaylandOutputListener()::<lambda(void*, wl_registry*, uint32_t, char const*, uint32_t)>::<lambda()> >::call(KdedDeviceNotifications::setupWaylandOutputListener()::<lambda(void*, wl_registry*, uint32_t, char const*, uint32_t)>::<lambda()>&, void**)::<lambda()> > (args=<optimized out>, fn=...) at /usr/include/qt6/QtCore/qobjectdefs_impl.h:65
#10 QtPrivate::FunctorCall<std::integer_sequence<long unsigned int>, QtPrivate::List<>, void, KdedDeviceNotifications::setupWaylandOutputListener()::<lambda(void*, wl_registry*, uint32_t, char const*, uint32_t)>::<lambda()> >::call (f=..., arg=<optimized out>) at /usr/include/qt6/QtCore/qobjectdefs_impl.h:115
#11 QtPrivate::FunctorCallable<KdedDeviceNotifications::setupWaylandOutputListener()::<lambda(void*, wl_registry*, uint32_t, char const*, uint32_t)>::<lambda()> >::call<QtPrivate::List<>, void> (f=..., arg=<optimized out>) at /usr/include/qt6/QtCore/qobjectdefs_impl.h:337
#12 QtPrivate::QCallableObject<KdedDeviceNotifications::setupWaylandOutputListener()::<lambda(void*, wl_registry*, uint32_t, char const*, uint32_t)>::<lambda()>, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=1, this_=0x557bd1eba700, r=<optimized out>, a=<optimized out>, ret=0x0) at /usr/include/qt6/QtCore/qobjectdefs_impl.h:547
#13 0x00007f52a69d734f in QtPrivate::QSlotObjectBase::call (this=<optimized out>, r=<optimized out>, a=<optimized out>, this=<optimized out>, r=<optimized out>, a=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobjectdefs_impl.h:461
#14 doActivate<false> (sender=<optimized out>, signal_index=<optimized out>, argv=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobject.cpp:4257
#15 0x00007f5298028c60 in QtWayland::kde_output_device_v2::handle_uuid (data=0x557bd1d9b960, object=<optimized out>, uuid=0x7f528c0075ec "0e2d34f9-00c1-4aa2-b725-0926bcde914d") at /usr/src/debug/plasma-workspace/build/devicenotifications/qwayland-kde-output-device-v2.cpp:194
#16 0x00007f52a837eac6 in ffi_call_unix64 () at ../src/x86/unix64.S:104
#17 0x00007f52a837b76b in ffi_call_int (cif=cif@entry=0x7ffc99f95c00, fn=fn@entry=0x7f5298028c00 <QtWayland::kde_output_device_v2::handle_uuid(void*, kde_output_device_v2*, char const*)>, rvalue=<optimized out>, rvalue@entry=0x0, avalue=avalue@entry=0x7ffc99f95cd0, closure=closure@entry=0x0) at ../src/x86/ffi64.c:676
#18 0x00007f52a837e06e in ffi_call (cif=cif@entry=0x7ffc99f95c00, fn=0x7f5298028c00 <QtWayland::kde_output_device_v2::handle_uuid(void*, kde_output_device_v2*, char const*)>, rvalue=rvalue@entry=0x0, avalue=avalue@entry=0x7ffc99f95cd0) at ../src/x86/ffi64.c:713
#19 0x00007f52a839148d in wl_closure_invoke (closure=closure@entry=0x7f528c007510, target=<optimized out>, target@entry=0x557bd1bd2fd0, opcode=opcode@entry=7, data=<optimized out>, flags=1) at ../wayland-1.24.0/src/connection.c:1241
#20 0x00007f52a83922e9 in dispatch_event (display=0x557bd175c750, queue=0x557bd175c848) at ../wayland-1.24.0/src/wayland-client.c:1707
#21 0x00007f52a83926f3 in dispatch_queue (display=0x557bd175c750, queue=0x557bd175c848) at ../wayland-1.24.0/src/wayland-client.c:1853
#22 wl_display_dispatch_queue_pending (display=0x557bd175c750, queue=0x557bd175c848) at ../wayland-1.24.0/src/wayland-client.c:2190
#23 0x00007f52a2d630c6 in QtWaylandClient::QWaylandDisplay::flushRequests (this=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/plugins/platforms/wayland/qwaylanddisplay.cpp:230
#24 0x00007f52a69c4994 in QObject::event (this=<optimized out>, e=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobject.cpp:1413
#25 0x00007f52a7d021c0 in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x557bd175be40, e=0x7f529400ca40) at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:3305
#26 0x00007f52a696a958 in QCoreApplication::notifyInternal2 (receiver=0x557bd175be40, event=event@entry=0x7f529400ca40) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1109
#27 0x00007f52a696ad30 in QCoreApplication::sendEvent (receiver=<optimized out>, event=0x7f529400ca40) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1549
#28 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x557bd17534e0) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1904
#29 0x00007f52a6c4ae18 in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1757
#30 postEventSourceDispatch (s=0x557bd1757d80) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:246
#31 0x00007f52a62b5f8d in g_main_dispatch (context=0x7f529c000f60) at ../glib/glib/gmain.c:3565
#32 0x00007f52a62b7657 in g_main_context_dispatch_unlocked (context=0x7f529c000f60) at ../glib/glib/gmain.c:4425
#33 g_main_context_iterate_unlocked (context=context@entry=0x7f529c000f60, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:4490
#34 0x00007f52a62b7865 in g_main_context_iteration (context=0x7f529c000f60, may_block=1) at ../glib/glib/gmain.c:4556
#35 0x00007f52a6c48172 in QEventDispatcherGlib::processEvents (this=0x557bd1764ff0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:401
#36 0x00007f52a6975786 in QEventLoop::processEvents (this=0x7ffc99f96320, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:104
#37 QEventLoop::exec (this=0x7ffc99f96320, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:186
#38 0x00007f52a696f3f1 in QCoreApplication::exec () at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1452
#39 0x0000557bb10bbad4 in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/kded/kded-6.22.0/src/kded.cpp:634

Reported using DrKonqi
Comment 1 Nicolas Fella 2026-01-22 16:44:29 UTC 

*** This bug has been marked as a duplicate of bug 512971 ***