Application: plasmashell (6.5.4) ApplicationNotResponding [ANR]: false Qt Version: 6.10.1 Frameworks Version: 6.21.0 Operating System: Linux 6.14.0-37-generic x86_64 Windowing System: Wayland Distribution: KDE neon User Edition DrKonqi: 6.5.4 [CoredumpBackend] -- Information about the crash: Plasma Shell (and only Plasma Shell) crashes repeatedly (every couple of seconds for a few minutes) on reboot. I can still get to a GUI, open applications with Alt+F2, and so on. In fact, I can open Konsole and run startplasma-wayland from there, and then it works perfectly without so much as a message on stdout or stderr. It's only when started by sddm that it seems to crash. The crash can be reproduced every time. -- Backtrace (Reduced): #6 std::__atomic_base<QMutexPrivate*>::load (__m=std::memory_order_relaxed, this=0x3042f62374d28590) at /usr/include/c++/13/atomic:576 #7 std::atomic<QMutexPrivate*>::load (__m=std::memory_order_relaxed, this=0x3042f62374d28590) at /usr/include/c++/13/atomic:577 #8 QAtomicOps<QMutexPrivate*>::loadRelaxed<QMutexPrivate*> (_q_value=<error reading variable: Cannot access memory at address 0x3042f62374d28590>) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/thread/qatomic_cxx11.h:203 #9 QBasicAtomicPointer<QMutexPrivate>::loadRelaxed (this=0x3042f62374d28590) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/thread/qbasicatomic.h:171 #10 QBasicMutex::fastTryLock (this=0x3042f62374d28590) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/thread/qmutex.h:88 #11 QBasicMutex::lock (this=0x3042f62374d28590) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/thread/qmutex.h:44 #12 std::unique_lock<QMutex>::lock (this=<synthetic pointer>) at /usr/include/c++/13/bits/unique_lock.h:141 #13 std::unique_lock<QMutex>::unique_lock (__m=..., this=<synthetic pointer>) at /usr/include/c++/13/bits/unique_lock.h:71 #14 (anonymous namespace)::qt_unique_lock<QMutex> (mutex=...) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/thread/qlocking_p.h:67 #15 QCoreApplicationPrivate::lockThreadPostEventList (object=object@entry=0x58d3ede95ac0) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/kernel/qcoreapplication.cpp:1589 #16 0x00007ff5f0ed6752 in QCoreApplication::postEvent (receiver=0x58d3ede95ac0, event=0x7ff57cc32620, priority=0) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/kernel/qcoreapplication.cpp:1649 #17 0x00007ff5f0e9fd85 in QtPrivate::QSlotObjectBase::call (a=0x7ff5839fe578, r=<optimized out>, this=0x58d3edec4c10, this=<optimized out>, r=<optimized out>, a=<optimized out>) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/kernel/qobjectdefs_impl.h:461 #18 doActivate<false> (sender=0x58d3ed6c8d40, signal_index=30, argv=0x7ff5839fe578) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/kernel/qobject.cpp:4257 #19 0x00007ff5f2818e1f in QQuickWindowPrivate::renderSceneGraph (this=0x58d3ed5ccb20) at /usr/src/qt6-declarative-6.10.1-0zneon+24.04+noble+release+build76/src/quick/items/qquickwindow.cpp:694 #20 0x00007ff5f2624456 in QSGRenderThread::syncAndRender (this=<optimized out>) at /usr/src/qt6-declarative-6.10.1-0zneon+24.04+noble+release+build76/src/quick/scenegraph/qsgthreadedrenderloop.cpp:779 #21 QSGRenderThread::run (this=0x58d3ee011f80) at /usr/src/qt6-declarative-6.10.1-0zneon+24.04+noble+release+build76/src/quick/scenegraph/qsgthreadedrenderloop.cpp:992 Reported using DrKonqi
Created attachment 188177 [details] New crash information added by DrKonqi DrKonqi auto-attaching complete backtrace.
The backtrace looks to be entirely in Qt. Thread 1 (Thread 0x7ff5839ff6c0 (LWP 22481)): [KCrash Handler] #6 std::__atomic_base<QMutexPrivate*>::load (__m=std::memory_order_relaxed, this=0x3042f62374d28590) at /usr/include/c++/13/atomic:576 #7 std::atomic<QMutexPrivate*>::load (__m=std::memory_order_relaxed, this=0x3042f62374d28590) at /usr/include/c++/13/atomic:577 #8 QAtomicOps<QMutexPrivate*>::loadRelaxed<QMutexPrivate*> (_q_value=<error reading variable: Cannot access memory at address 0x3042f62374d28590>) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/thread/qatomic_cxx11.h:203 #9 QBasicAtomicPointer<QMutexPrivate>::loadRelaxed (this=0x3042f62374d28590) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/thread/qbasicatomic.h:171 #10 QBasicMutex::fastTryLock (this=0x3042f62374d28590) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/thread/qmutex.h:88 #11 QBasicMutex::lock (this=0x3042f62374d28590) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/thread/qmutex.h:44 #12 std::unique_lock<QMutex>::lock (this=<synthetic pointer>) at /usr/include/c++/13/bits/unique_lock.h:141 #13 std::unique_lock<QMutex>::unique_lock (__m=..., this=<synthetic pointer>) at /usr/include/c++/13/bits/unique_lock.h:71 #14 (anonymous namespace)::qt_unique_lock<QMutex> (mutex=...) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/thread/qlocking_p.h:67 #15 QCoreApplicationPrivate::lockThreadPostEventList (object=object@entry=0x58d3ede95ac0) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/kernel/qcoreapplication.cpp:1589 #16 0x00007ff5f0ed6752 in QCoreApplication::postEvent (receiver=0x58d3ede95ac0, event=0x7ff57cc32620, priority=0) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/kernel/qcoreapplication.cpp:1649 #17 0x00007ff5f0e9fd85 in QtPrivate::QSlotObjectBase::call (a=0x7ff5839fe578, r=<optimized out>, this=0x58d3edec4c10, this=<optimized out>, r=<optimized out>, a=<optimized out>) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/kernel/qobjectdefs_impl.h:461 #18 doActivate<false> (sender=0x58d3ed6c8d40, signal_index=30, argv=0x7ff5839fe578) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/kernel/qobject.cpp:4257 #19 0x00007ff5f2818e1f in QQuickWindowPrivate::renderSceneGraph (this=0x58d3ed5ccb20) at /usr/src/qt6-declarative-6.10.1-0zneon+24.04+noble+release+build76/src/quick/items/qquickwindow.cpp:694 #20 0x00007ff5f2624456 in QSGRenderThread::syncAndRender (this=<optimized out>) at /usr/src/qt6-declarative-6.10.1-0zneon+24.04+noble+release+build76/src/quick/scenegraph/qsgthreadedrenderloop.cpp:779 #21 QSGRenderThread::run (this=0x58d3ee011f80) at /usr/src/qt6-declarative-6.10.1-0zneon+24.04+noble+release+build76/src/quick/scenegraph/qsgthreadedrenderloop.cpp:992 #22 0x00007ff5f0da6f53 in operator() (__closure=<optimized out>) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/thread/qthread_unix.cpp:437 #23 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=<optimized out>) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/thread/qthread_unix.cpp:367 #24 QThreadPrivate::start (arg=0x58d3ee011f80) at /usr/src/qt6-base-6.10.1-0zneon+24.04+noble+release+build144/src/corelib/thread/qthread_unix.cpp:397 #25 0x00007ff5f029caa4 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:447 #26 0x00007ff5f0329c6c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 Reported using DrKonqi
Update: starting Plasma from Konsole only worked the first time. Since then, it shows the splash screen, then goes back to the desktop with no wallpaper or panels and no messages in stdout or stderr.