Bug 513362

Summary: Crash While Watching Youtube Video in Brave browser
Product: [Plasma] kwin Reporter: Tim <tda0626>
Component: generalAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED BACKTRACE    
Severity: crash CC: kde
Priority: NOR Keywords: drkonqi
Version First Reported In: 6.5.4   
Target Milestone: ---   
Platform: CachyOS   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report: https://crash-reports.kde.org/organizations/kde/issues/114898/events/8fe56aebe4f14e71aff12ee44dd26a06/

Description Tim 2025-12-14 14:42:10 UTC 
Application: kwin_wayland (6.5.4)

ApplicationNotResponding [ANR]: false
Qt Version: 6.10.1
Frameworks Version: 6.20.0
Operating System: Linux 6.18.0-3-cachyos x86_64
Windowing System: Wayland
Distribution: CachyOS
DrKonqi: 6.5.4 [CoredumpBackend]

-- Information about the crash:
Hello,

This seems to happen once a day now with my browser open and watching a Youtube video. I am watching a video and then Kwin crashes and it crashes my browser in the process. I have been having issues with Kwin crashing randomly and I usually have to restart the Plasmashell, with the command systemctl --user restart plasma-plasmashell, because the Application Launcher will not work until I do.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_wayland), signal: Segmentation fault


warning: Can't open file /memfd:JSVMStack:QtQml (deleted) during file-backed mapping note processing

warning: Can't open file /memfd:kwayland-shared (deleted) during file-backed mapping note processing

warning: Can't open file /usr/share/icons/hicolor/icon-theme.cache (deleted) during file-backed mapping note processing

warning: Can't open file /memfd:JSGCHeap:QtQml (deleted) during file-backed mapping note processing

warning: Can't open file /memfd:/.glXXXXXX (deleted) during file-backed mapping note processing

warning: Can't open file /memfd:wayland-cursor (deleted) during file-backed mapping note processing

warning: Can't open file /memfd:JITCode:QtQml (deleted) during file-backed mapping note processing

warning: Can't open file /memfd:xwayland-shared (deleted) during file-backed mapping note processing

warning: Can't open file /memfd:unknown-usage:QtQml (deleted) during file-backed mapping note processing

warning: Can't open file /memfd:wayland-shm (deleted) during file-backed mapping note processing
[New LWP 2072]
[New LWP 2071]
[New LWP 2038]
[New LWP 2053]
[New LWP 2290]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `/usr/bin/kwin_wayland --wayland-fd 7 --socket wayland-0 --xwayland-fd 8 --xwayland-fd 9 --xwayland-display :0 --xwayland-xauthority /run/user/1000/xauth_RWiqPN --xwayland'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f2dcaaaa0fb in pthread_kill () from /usr/lib/libc.so.6
[Current thread is 1 (Thread 0x7f2dc20fa6c0 (LWP 2072))]
[Current thread is 1 (Thread 0x7f2dc20fa6c0 (LWP 2072))]

Thread 5 (Thread 0x7f2da09ba6c0 (LWP 2290)):
#0  0x00007f2dcaab0892 in ??? () at /usr/lib/libc.so.6
#1  0x00007f2dcaaa42d8 in ??? () at /usr/lib/libc.so.6
#2  0x00007f2dcab2cb33 in ppoll () at /usr/lib/libc.so.6
#3  0x00007f2dc9d648a0 in ??? () at /usr/lib/libglib-2.0.so.0
#4  0x00007f2dc9d64982 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007f2dcb68e7db in QEventDispatcherGlib::processEvents (this=0x7f2d94000be0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:399
#6  0x00007f2dcb386336 in QEventLoop::processEvents (this=0x7f2da09b9990, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:104
#7  QEventLoop::exec (this=0x7f2da09b9990, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:186
#8  0x00007f2dcb4b0aea in QThread::exec (this=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread.cpp:672
#9  0x00007f2dcb55825e in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:437
#10 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:367
#11 QThreadPrivate::start (arg=0x55dd782d6fb0) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:397
#12 0x00007f2dcaaa80d6 in ??? () at /usr/lib/libc.so.6
#13 0x00007f2dcab3b05c in ??? () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f2dc37ff6c0 (LWP 2053)):
#0  0x00007f2dcaab0892 in ??? () at /usr/lib/libc.so.6
#1  0x00007f2dcaaa42d8 in ??? () at /usr/lib/libc.so.6
#2  0x00007f2dcab2cb33 in ppoll () at /usr/lib/libc.so.6
#3  0x00007f2dc9d648a0 in ??? () at /usr/lib/libglib-2.0.so.0
#4  0x00007f2dc9d64982 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007f2dcb68e7db in QEventDispatcherGlib::processEvents (this=0x7f2dbc000be0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:399
#6  0x00007f2dcb386336 in QEventLoop::processEvents (this=0x7f2dc37fe950, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:104
#7  QEventLoop::exec (this=0x7f2dc37fe950, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:186
#8  0x00007f2dcb4b0aea in QThread::exec (this=this@entry=0x7f2dcb9fee40 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager> >::instance()::holder>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread.cpp:672
#9  0x00007f2dcb97509f in QDBusConnectionManager::run (this=0x7f2dcb9fee40 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS__q_manager> >::instance()::holder>) at /usr/src/debug/qt6-base/qtbase/src/dbus/qdbusconnectionmanager.cpp:145
#10 0x00007f2dcb55825e in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:437
#11 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:367
#12 QThreadPrivate::start (arg=0x7f2dcb9fee40 <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
#13 0x00007f2dcaaa80d6 in ??? () at /usr/lib/libc.so.6
#14 0x00007f2dcab3b05c in ??? () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f2dc3b96b80 (LWP 2038)):
#0  0x00007f2dcaab0892 in ??? () at /usr/lib/libc.so.6
#1  0x00007f2dcaaa42d8 in ??? () at /usr/lib/libc.so.6
#2  0x00007f2dcab2cb33 in ppoll () at /usr/lib/libc.so.6
#3  0x00007f2dcb54e643 in ppoll (__fds=<optimized out>, __nfds=<optimized out>, __timeout=<optimized out>, __ss=<optimized out>) at /usr/include/bits/poll2.h:101
#4  qt_ppoll (fds=0x55dd78e00a10, nfds=12, timeout_ts=0x0) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcore_unix.cpp:103
#5  qt_ppoll (fds=0x55dd78e00a10, nfds=12, timeout_ts=0x0) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcore_unix.cpp:100
#6  qt_safe_poll (deadline=..., fds=<optimized out>, nfds=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcore_unix.cpp:126
#7  qt_safe_poll (fds=0x55dd78e00a10, nfds=12, deadline=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcore_unix.cpp:121
#8  0x00007f2dcb5631ec in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=flags@entry=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/tools/qarraydatapointer.h:119
#9  0x00007f2dcc1bb022 in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at /usr/src/debug/qt6-base/qtbase/src/gui/platform/unix/qunixeventdispatcher.cpp:28
#10 0x00007f2dcb386336 in QEventLoop::processEvents (this=0x7ffe40d670f0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:104
#11 QEventLoop::exec (this=0x7ffe40d670f0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:186
#12 0x00007f2dcb37fb2c in QCoreApplication::exec () at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1452
#13 0x000055dd61318b70 in ??? ()
#14 0x00007f2dcaa27b8b in ??? () at /usr/lib/libc.so.6
#15 0x00007f2dcaa27c4b in __libc_start_main () at /usr/lib/libc.so.6
#16 0x000055dd613203e5 in ??? ()

Thread 2 (Thread 0x7f2dc28fb6c0 (LWP 2071)):
#0  0x00007f2dcaab0892 in ??? () at /usr/lib/libc.so.6
#1  0x00007f2dcaaa4248 in ??? () at /usr/lib/libc.so.6
#2  0x00007f2dcaaf544e in clock_nanosleep () at /usr/lib/libc.so.6
#3  0x00007f2dcab04fa7 in nanosleep () at /usr/lib/libc.so.6
#4  0x00007f2dce100379 in ??? () at /usr/lib/libkwin.so.6
#5  0x00007f2dce1007f9 in ??? () at /usr/lib/libkwin.so.6
#6  0x00007f2dce0f9c31 in ??? () at /usr/lib/libkwin.so.6
#7  0x00007f2dcaaad6ac in ??? () at /usr/lib/libc.so.6
#8  0x00007f2dcaaad729 in pthread_once () at /usr/lib/libc.so.6
#9  0x00007f2dce1021db in ??? () at /usr/lib/libkwin.so.6
#10 0x00007f2dcb4b166d in std::__future_base::_State_baseV2::wait (this=0x55dd77c00770) at /usr/include/c++/15.2.1/future:359
#11 std::__basic_future<void>::_M_get_result (this=0x55dd77c549e0) at /usr/include/c++/15.2.1/future:750
#12 std::future<void>::get (this=0x55dd77c549e0) at /usr/include/c++/15.2.1/future:922
#13 QThreadCreateThread::run (this=0x55dd77c549d0) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread.cpp:1390
#14 0x00007f2dcb55825e in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:437
#15 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:367
#16 QThreadPrivate::start (arg=0x55dd77c549d0) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:397
#17 0x00007f2dcaaa80d6 in ??? () at /usr/lib/libc.so.6
#18 0x00007f2dcab3b05c in ??? () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f2dc20fa6c0 (LWP 2072)):
[KCrash Handler]
#4  0x00007f2dce4be0b0 in ??? () at /usr/lib/libkwin.so.6
#5  0x00007f2dca911f70 in libinput_dispatch () at /usr/lib/libinput.so.10
#6  0x00007f2dce144d09 in KWin::LibInput::Connection::handleEvent() () at /usr/lib/libkwin.so.6
#7  0x00007f2dcb3eb3d6 in QtPrivate::QSlotObjectBase::call (this=0x7f2db8001700, r=<optimized out>, a=0x7f2dc20f95e0, this=<optimized out>, r=<optimized out>, a=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobjectdefs_impl.h:461
#8  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
#9  0x00007f2dcb3fe151 in QMetaObject::activate<void, QSocketDescriptor, QSocketNotifier::Type, QSocketNotifier::QPrivateSignal> (sender=0x7f2db80015b0, mo=<optimized out>, local_signal_index=0, ret=0x0) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobjectdefs.h:319
#10 QSocketNotifier::activated (this=0x7f2db80015b0, _t1=..., _t2=<optimized out>, _t3=...) at /usr/src/debug/qt6-base/build/src/corelib/Core_autogen/include/moc_qsocketnotifier.cpp:161
#11 QSocketNotifier::event (this=0x7f2db80015b0, e=0x7f2dc20f9700) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qsocketnotifier.cpp:324
#12 0x00007f2dcc502229 in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x7f2db80015b0, e=0x7f2dc20f9700) at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:3305
#13 0x00007f2dcb37aed8 in QCoreApplication::notifyInternal2 (receiver=0x7f2db80015b0, event=0x7f2dc20f9700) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1109
#14 0x00007f2dcb691890 in QCoreApplication::sendEvent (receiver=<optimized out>, event=0x7f2dc20f9700) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1549
#15 socketNotifierSourceDispatch (source=0x7f2db8001130) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:77
#16 0x00007f2dc9d63429 in ??? () at /usr/lib/libglib-2.0.so.0
#17 0x00007f2dc9d64848 in ??? () at /usr/lib/libglib-2.0.so.0
#18 0x00007f2dc9d64982 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#19 0x00007f2dcb68e7db in QEventDispatcherGlib::processEvents (this=0x7f2db8000be0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:399
#20 0x00007f2dcb386336 in QEventLoop::processEvents (this=0x7f2dc20f9990, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:104
#21 QEventLoop::exec (this=0x7f2dc20f9990, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:186
#22 0x00007f2dcb4b0aea in QThread::exec (this=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread.cpp:672
#23 0x00007f2dcb55825e in operator() (__closure=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:437
#24 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:367
#25 QThreadPrivate::start (arg=0x55dd77c594c8) at /usr/src/debug/qt6-base/qtbase/src/corelib/thread/qthread_unix.cpp:397
#26 0x00007f2dcaaa80d6 in ??? () at /usr/lib/libc.so.6
#27 0x00007f2dcab3b05c in ??? () at /usr/lib/libc.so.6

Reported using DrKonqi
Comment 1 David Edmundson 2025-12-14 22:55:49 UTC 
>#4  0x00007f2dce4be0b0 in ??? () at /usr/lib/libkwin.so.6

Unfortunately this is missing debug symbols in the most crucial place. This leaves this report unactionable as we can't directly reproduce.

If you can get debug symbols, that would help, otherwise we'll follow up via other crash reporting traces.
Comment 2 Tim 2025-12-15 00:29:16 UTC 
When it came up to report it, I selected "Download Debug Symbols". Is there something else that needs to be done? Sorry, I thought that was it.
Comment 3 Vlad Zahorodnii 2025-12-15 07:46:32 UTC 
(In reply to Tim from comment #2)
> When it came up to report it, I selected "Download Debug Symbols". Is there
> something else that needs to be done? Sorry, I thought that was it.

You may need to ensure that debuginfod is installed. If it's already installed, please check with support forums of your distro what else needs to be set up.