Bug 480874

Application: kalarm (3.6.3 (KDE Gear 23.08.4))

Qt Version: 5.15.12
Frameworks Version: 5.114.0
Operating System: Linux 6.7.2-1-default x86_64
Windowing System: Wayland
Distribution: "openSUSE Tumbleweed"
DrKonqi: 5.27.10 [KCrashBackend]

-- Information about the crash:
I was sitting at the PC at the time, watching a movie in the browser. I can see a very large spike in CPU utilisation (it reached >20% so must have maxxed out at least 2 cores to do this (it;s a 12C/24T CPU) and also a large spike in GPU utilisation at the time of the intended alarm/the crash. No errors have been recorded in pipewire, so it seems it never reached that stage. I also never saw the popup. There was a brief visual 'glitch', seemed like the video dropped a frame or two. I had tested the alarm during its setup and it worked, I have rebooted since then but no change has been made to the system, and I restarted the app immediately after the crash and the alarm went off immediately without any problem. The GPU utilisation spiked in a similar manner, but the CPU spike was small and what I'd consider 'normal'.

I've used Kalarm several times in a similar situation and never had any issue. Please feel free to contact me if I can help in any way with this.

The crash does not seem to be reproducible.

-- Backtrace:
Application: KAlarm (kalarm), signal: Aborted

[KCrash Handler]
#4  0x00007f201ba91dec in __pthread_kill_implementation () at /lib64/libc.so.6
#5  0x00007f201ba3f0c6 in raise () at /lib64/libc.so.6
#6  0x00007f201ba268d7 in abort () at /lib64/libc.so.6
#7  0x00007f201d8f7bbd in  () at /lib64/libpulse-mainloop-glib.so.0
#8  0x00007f201d8f8840 in pa_glib_mainloop_free () at /lib64/libpulse-mainloop-glib.so.0
#9  0x00007f201e5d6f7f in Phonon::PulseSupport::~PulseSupport() () at /lib64/libphonon4qt5.so.4
#10 0x00007f201e5d8888 in Phonon::PulseSupport::shutdown() () at /lib64/libphonon4qt5.so.4
#11 0x00007f2008045d14 in  () at /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_vlc.so
#12 0x00007f201e5cb9d7 in  () at /lib64/libphonon4qt5.so.4
#13 0x00007f201e5d182c in Phonon::MediaNodePrivate::backendObject() () at /lib64/libphonon4qt5.so.4
#14 0x00007f201e5d1e96 in Phonon::MediaObject::setCurrentSource(Phonon::MediaSource const&) () at /lib64/libphonon4qt5.so.4
#15 0x00005655362d0a82 in  ()
#16 0x00007f201c525832 in  () at /lib64/libQt5Core.so.5
#17 0x00007f201c30223a in QThread::started(QThread::QPrivateSignal) () at /lib64/libQt5Core.so.5
#18 0x00007f201c304266 in  () at /lib64/libQt5Core.so.5
#19 0x00007f201ba8ff44 in start_thread () at /lib64/libc.so.6
#20 0x00007f201bb184ec in clone3 () at /lib64/libc.so.6

Thread 4 (Thread 0x7f200b4006c0 (LWP 11767) "WaylandEventThr"):
#1  0x00007f201b371396 in  () at /lib64/libQt5WaylandClient.so.5
#2  0x00007f201c30427d in  () at /lib64/libQt5Core.so.5
#3  0x00007f201ba8ff44 in start_thread () at /lib64/libc.so.6
#4  0x00007f201bb184ec in clone3 () at /lib64/libc.so.6

Thread 3 (Thread 0x7f200be006c0 (LWP 11766) "WaylandEventThr"):
#1  0x00007f201ba8f230 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libc.so.6
#2  0x00007f201c309afb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /lib64/libQt5Core.so.5
#3  0x00007f201b37133f in  () at /lib64/libQt5WaylandClient.so.5
#4  0x00007f201c30427d in  () at /lib64/libQt5Core.so.5
#5  0x00007f201ba8ff44 in start_thread () at /lib64/libc.so.6
#6  0x00007f201bb184ec in clone3 () at /lib64/libc.so.6

Thread 2 (Thread 0x7f20118006c0 (LWP 11765) "QDBusConnection"):
#1  0x00007f201a515aff in  () at /lib64/libglib-2.0.so.0
#2  0x00007f201a51620c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f201c54688e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f201c4ec3cb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f201c30304e in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f201d186517 in  () at /lib64/libQt5DBus.so.5
#7  0x00007f201c30427d in  () at /lib64/libQt5Core.so.5
#8  0x00007f201ba8ff44 in start_thread () at /lib64/libc.so.6
#9  0x00007f201bb184ec in clone3 () at /lib64/libc.so.6

Thread 1 (Thread 0x7f2018a4aec0 (LWP 11761) "kalarm"):
#1  0x00007f201a515aff in  () at /lib64/libglib-2.0.so.0
#2  0x00007f201a51620c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f201c54688e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f201c4ec3cb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f201c4f4860 in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#6  0x000056553621f966 in  ()
#7  0x00007f201ba281b0 in __libc_start_call_main () at /lib64/libc.so.6
#8  0x00007f201ba28279 in __libc_start_main_impl () at /lib64/libc.so.6
#9  0x0000565536221295 in  ()
[Inferior 1 (process 11761) detached]

Reported using DrKonqi