Context: I was on the system settings app on the page for power management. Screen turned off automatically due to power settings. Turned it back on by moving the mouse. Powerdevil crashed. I have a crash log with debug symbols and I'll make it available in this post. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Fedora Linux 40 KDE Plasma Version: 6.1.3 KDE Frameworks Version: 6.4.0 Qt Version: 6.7.2 =============================================================================================================================================================================================================================================================================================================================== Application: KDE Power Management System (org_kde_powerdevil), signal: Segmentation fault Content of s_kcrashErrorMessage: std::unique_ptr<char []> = {get() = <optimized out>} [New LWP 2138] [New LWP 2162] [New LWP 2164] [New LWP 2158] [New LWP 2163] [New LWP 2157] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Core was generated by `/usr/libexec/org_kde_powerdevil'. Program terminated with signal SIGSEGV, Segmentation fault. #0 __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=11, no_tid=no_tid@entry=0) at pthread_kill.c:44 44 return INTERNAL_SYSCALL_ERROR_P (ret) ? INTERNAL_SYSCALL_ERRNO (ret) : 0; [Current thread is 1 (Thread 0x7f48fff18b00 (LWP 2138))] Cannot QML trace cores :( [Current thread is 1 (Thread 0x7f48fff18b00 (LWP 2138))] Thread 6 (Thread 0x7f48f20006c0 (LWP 2157)): #0 0x00007f490791c67d in __GI___poll (fds=0x5650d7bb2580, nfds=5, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f49064ccc34 in g_main_context_poll_unlocked (priority=2147483647, context=0x7f48ec000c80, timeout=<optimized out>, fds=0x5650d7bb2580, n_fds=5) at ../glib/gmain.c:4521 #2 g_main_context_iterate_unlocked.isra.0 (context=context@entry=0x7f48ec000c80, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4212 #3 0x00007f490646c383 in g_main_context_iteration (context=0x7f48ec000c80, may_block=1) at ../glib/gmain.c:4282 #4 0x00007f49082850a3 in QEventDispatcherGlib::processEvents (this=0x7f48ec000b70, flags=...) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:394 #5 0x00007f4907fa3b03 in QEventLoop::exec (this=this@entry=0x7f48f1fffa20, flags=..., flags@entry=...) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/global/qflags.h:34 #6 0x00007f49080b7e4f in QThread::exec (this=this@entry=0x7f4909036cc0 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager> >::instance()::holder>) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/global/qflags.h:74 #7 0x00007f4908fa7e41 in QDBusConnectionManager::run (this=0x7f4909036cc0 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager> >::instance()::holder>) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/dbus/qdbusconnectionmanager.cpp:144 #8 0x00007f490815463c in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/thread/qthread_unix.cpp:326 #9 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/thread/qthread_unix.cpp:262 #10 QThreadPrivate::start (arg=0x7f4909036cc0 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager> >::instance()::holder>) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/thread/qthread_unix.cpp:285 #11 0x00007f49078a6507 in start_thread (arg=<optimized out>) at pthread_create.c:447 #12 0x00007f490792a40c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 Thread 5 (Thread 0x7f48e9c006c0 (LWP 2163)): #0 0x00007f490791c67d in __GI___poll (fds=0x5650d7b6dab0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f49064ccc34 in g_main_context_poll_unlocked (priority=2147483647, context=0x5650d7b6d830, timeout=<optimized out>, fds=0x5650d7b6dab0, n_fds=1) at ../glib/gmain.c:4521 #2 g_main_context_iterate_unlocked.isra.0 (context=context@entry=0x5650d7b6d830, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4212 #3 0x00007f490646c383 in g_main_context_iteration (context=0x5650d7b6d830, may_block=may_block@entry=1) at ../glib/gmain.c:4282 #4 0x00007f490646c3e1 in glib_worker_main (data=<optimized out>) at ../glib/gmain.c:6442 #5 0x00007f490649b813 in g_thread_proxy (data=0x5650d7b6da50) at ../glib/gthread.c:835 #6 0x00007f49078a6507 in start_thread (arg=<optimized out>) at pthread_create.c:447 #7 0x00007f490792a40c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 Thread 4 (Thread 0x7f48f16006c0 (LWP 2158)): #0 0x00007f490791c67d in __GI___poll (fds=fds@entry=0x7f48f15ff968, nfds=nfds@entry=1, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f49076d2072 in poll (__fds=0x7f48f15ff968, __nfds=1, __timeout=-1) at /usr/include/bits/poll2.h:39 #2 _xcb_conn_wait (c=c@entry=0x5650d75c1910, vector=vector@entry=0x0, count=count@entry=0x0, cond=<optimized out>) at /usr/src/debug/libxcb-1.17.0-1.fc40.x86_64/src/xcb_conn.c:510 #3 0x00007f49076d3c8c in _xcb_conn_wait (c=0x5650d75c1910, cond=0x5650d75c1950, vector=0x0, count=0x0) at /usr/src/debug/libxcb-1.17.0-1.fc40.x86_64/src/xcb_conn.c:476 #4 xcb_wait_for_event (c=0x5650d75c1910) at /usr/src/debug/libxcb-1.17.0-1.fc40.x86_64/src/xcb_in.c:703 #5 0x00007f48ffe81f08 in QXcbEventQueue::run (this=0x5650d75bc4c0) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/plugins/platforms/xcb/qxcbeventqueue.cpp:192 #6 0x00007f490815463c in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/thread/qthread_unix.cpp:326 #7 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=...) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/thread/qthread_unix.cpp:262 #8 QThreadPrivate::start (arg=0x5650d75bc4c0) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/thread/qthread_unix.cpp:285 #9 0x00007f49078a6507 in start_thread (arg=<optimized out>) at pthread_create.c:447 #10 0x00007f490792a40c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 Thread 3 (Thread 0x7f48e92006c0 (LWP 2164)): #0 0x00007f490791c67d in __GI___poll (fds=0x7f48d0000b90, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f49064ccc34 in g_main_context_poll_unlocked (priority=2147483647, context=0x5650d7b76c80, timeout=<optimized out>, fds=0x7f48d0000b90, n_fds=2) at ../glib/gmain.c:4521 #2 g_main_context_iterate_unlocked.isra.0 (context=0x5650d7b76c80, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4212 #3 0x00007f4906470f37 in g_main_loop_run (loop=0x5650d7b76ad0) at ../glib/gmain.c:4419 #4 0x00007f4900438682 in gdbus_shared_thread_func (user_data=0x5650d7b76c50) at ../gio/gdbusprivate.c:284 #5 0x00007f490649b813 in g_thread_proxy (data=0x5650d795c3b0) at ../glib/gthread.c:835 #6 0x00007f49078a6507 in start_thread (arg=<optimized out>) at pthread_create.c:447 #7 0x00007f490792a40c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 Thread 2 (Thread 0x7f48f0a006c0 (LWP 2162)): #0 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 #1 0x00007f49064c9ccd in g_cond_wait (cond=0x5650d79f6548, mutex=0x5650d79f6540) at ../glib/gthread-posix.c:1552 #2 0x00007f490643561b in g_async_queue_pop_intern_unlocked (queue=0x5650d79f6540, wait=1, end_time=-1) at ../glib/gasyncqueue.c:375 #3 0x00007f490649ca03 in g_thread_pool_spawn_thread (data=<optimized out>) at ../glib/gthreadpool.c:297 #4 0x00007f490649b813 in g_thread_proxy (data=0x5650d7b6d4b0) at ../glib/gthread.c:835 #5 0x00007f49078a6507 in start_thread (arg=<optimized out>) at pthread_create.c:447 #6 0x00007f490792a40c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 Thread 1 (Thread 0x7f48fff18b00 (LWP 2138)): [KCrash Handler] #5 0x00007f49092fc83a in PowerDevil::Core::unloadAllActiveActions (this=0x5650d762b9e0) at /usr/src/debug/powerdevil-6.1.3-2.fc40.x86_64/daemon/powerdevilcore.cpp:994 #6 0x00007f4909301360 in PowerDevil::Core::loadProfile (this=<optimized out>, force=true) at /usr/src/debug/powerdevil-6.1.3-2.fc40.x86_64/daemon/powerdevilcore.cpp:347 #7 0x00005650d4ea5262 in PowerManagementAdaptor::qt_metacall (this=0x5650d77c7cb0, _c=QMetaObject::InvokeMetaMethod, _id=20, _a=0x7ffc8a3dc008) at /usr/src/debug/powerdevil-6.1.3-2.fc40.x86_64/redhat-linux-build/daemon/moc_powermanagementadaptor.cpp:396 #8 0x00007f4908fb4421 in QDBusConnectionPrivate::deliverCall (this=this@entry=0x7f48ec001690, object=object@entry=0x5650d77c7cb0, msg=..., metaTypes=..., slotIdx=24) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/dbus/qdbusintegrator.cpp:1007 #9 0x00007f4908fb779c in QDBusConnectionPrivate::activateCall (this=this@entry=0x7f48ec001690, object=0x5650d77c7cb0, flags=flags@entry=..., msg=...) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/dbus/qdbusintegrator.cpp:916 #10 0x00007f4908fb8391 in QDBusConnectionPrivate::activateObject (this=0x7f48ec001690, node=..., msg=..., pathStartPos=<optimized out>) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/dbus/qdbusintegrator.cpp:1484 #11 0x00007f4908fbb2aa in QDBusActivateObjectEvent::placeMetaCall (this=0x7f48ec030420) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/dbus/qdbusintegrator.cpp:1604 #12 0x00007f4907fedd4b in QObject::event (this=0x5650d762b9e0, e=0x7f48ec030420) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/kernel/qobject.cpp:1452 #13 0x00007f4907f96dc8 in QCoreApplication::notifyInternal2 (receiver=0x5650d762b9e0, event=0x7f48ec030420) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/kernel/qcoreapplication.cpp:1142 #14 0x00007f4907f9702d in QCoreApplication::sendEvent (receiver=<optimized out>, event=<optimized out>) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/kernel/qcoreapplication.cpp:1583 #15 0x00007f4907f9ab91 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x5650d75abe60) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/kernel/qcoreapplication.cpp:1940 #16 0x00007f4907f9ae3d in QCoreApplication::sendPostedEvents (receiver=<optimized out>, event_type=<optimized out>) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/kernel/qcoreapplication.cpp:1797 #17 0x00007f49082858ef in postEventSourceDispatch (s=0x5650d75a2a60) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:244 #18 0x00007f490646ae8c in g_main_dispatch (context=0x7f48ec000f00) at ../glib/gmain.c:3344 #19 g_main_context_dispatch_unlocked (context=0x7f48ec000f00) at ../glib/gmain.c:4152 #20 0x00007f49064ccc98 in g_main_context_iterate_unlocked.isra.0 (context=context@entry=0x7f48ec000f00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4217 #21 0x00007f490646c383 in g_main_context_iteration (context=0x7f48ec000f00, may_block=1) at ../glib/gmain.c:4282 #22 0x00007f49082850a3 in QEventDispatcherGlib::processEvents (this=0x5650d75f1550, flags=...) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:394 #23 0x00007f4907fa3b03 in QEventLoop::exec (this=this@entry=0x7ffc8a3dc8a0, flags=..., flags@entry=...) at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/global/qflags.h:34 #24 0x00007f4907f9f9bc in QCoreApplication::exec () at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/corelib/global/qflags.h:74 #25 0x00007f49087d67ed in QGuiApplication::exec () at /usr/src/debug/qt6-qtbase-6.7.2-4.fc40.x86_64/src/gui/kernel/qguiapplication.cpp:1926 #26 0x00005650d4e9ce6c in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/powerdevil-6.1.3-2.fc40.x86_64/daemon/powerdevilapp.cpp:135
Thanks for the report. The fact that PowerDevil is crashing for you in action-related code makes me think that this is another symptom of the bug that's getting fixed in Plasma 6.1.4: https://invent.kde.org/plasma/powerdevil/-/merge_requests/408 In your case, it looks like loadProfile() is called via D-Bus from outside of PowerDevil. But the overall idea should still be the same: changing support for PowerDevil actions (e.g. when the screen becomes unavailable) left invalid actions hanging around in the PowerDevil::Core object, and the next time we try to make use of them, it crashes. Please retest with 6.1.4 (it's getting released today!) once Fedora updates to it, and report back on whether it's been fixed.
Hello. I was unable to reproduce the issue again on both 6.1.3 and 6.1.4, so I believe this was fixed since you said some code has been changed. I'm marking this as fixed and I'll report similar issues in the future if they arise. Many thanks!