Application: kwin_x11 (5.21.1)

Qt Version: 5.15.2
Frameworks Version: 5.79.0
Operating System: Linux 5.4.0-66-generic x86_64
Windowing System: X11
Drkonqi Version: 5.21.1
Distribution: KDE neon User Edition 5.21

-- Information about the crash:
- What I was doing when the application crashed:

I leave the laptop to suspend, and when I come back I find the compositor disabled. I get around it by re-enabling opengl detection and changing the rendering backend between the opengl versions.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Aborted
Content of s_kcrashErrorMessage: [Current thread is 1 (Thread 0x7fcd918f98c0 (LWP 754258))]
[New LWP 754261]
[New LWP 754263]
[New LWP 754346]
[New LWP 779678]
[New LWP 779701]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
__lll_lock_wait (futex=futex@entry=0x7fcd6f3efae0, private=0) at lowlevellock.c:52

Thread 6 (Thread 0x7fcd65769700 (LWP 779701)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fcd9721afd8 <QTWTF::pageheap_memory+57592>) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fcd9721af88 <QTWTF::pageheap_memory+57512>, cond=0x7fcd9721afb0 <QTWTF::pageheap_memory+57552>) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fcd9721afb0 <QTWTF::pageheap_memory+57552>, mutex=0x7fcd9721af88 <QTWTF::pageheap_memory+57512>) at pthread_cond_wait.c:638
#3  0x00007fcd9711d63a in QTWTF::TCMalloc_PageHeap::scavengerThread() (this=0x7fcd9720cee0 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#4  0x00007fcd9711d65f in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#5  0x00007fcd96a34609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fcd974d2293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fcd89437700 (LWP 779678)):
[KCrash Handler]
#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#7  0x00007fcd973d5859 in __GI_abort () at abort.c:79
#8  0x00007fcd973d5729 in __assert_fail_base (fmt=0x7fcd9756b588 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x7fcd95b82717 "!xcb_xlib_unknown_seq_number", file=0x7fcd95b826c3 "../../src/xcb_io.c", line=145, function=<optimized out>) at assert.c:92
#9  0x00007fcd973e6f36 in __GI___assert_fail (assertion=0x7fcd95b82717 "!xcb_xlib_unknown_seq_number", file=0x7fcd95b826c3 "../../src/xcb_io.c", line=145, function=0x7fcd95b82af0 "append_pending_request") at assert.c:101
#10 0x00007fcd95b0e25f in  () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#11 0x00007fcd95b0ecda in _XReply () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#12 0x00007fcd95b04b8a in XQueryExtension () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#13 0x00007fcd95af81c7 in XInitExtension () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#14 0x00007fcd91d8d3f1 in XextAddDisplay (extinfo=0x7fcd8c02bbb0, dpy=0x562b78ac2c40, ext_name=0x7fcd7822b37b "GLX", hooks=0x7fcd78459b40, nevents=17, data=0x0) at ../../src/extutil.c:110
#15 0x00007fcd781c32ae in  () at /usr/lib/x86_64-linux-gnu/libGLX_nvidia.so.0
#16 0x00007fcd781c3d7b in  () at /usr/lib/x86_64-linux-gnu/libGLX_nvidia.so.0
#17 0x00007fcd781c9d4e in  () at /usr/lib/x86_64-linux-gnu/libGLX_nvidia.so.0
#18 0x00007fcd96a335a1 in __nptl_deallocate_tsd () at pthread_create.c:301
#19 0x00007fcd96a3462a in __nptl_deallocate_tsd () at pthread_create.c:256
#20 start_thread (arg=<optimized out>) at pthread_create.c:488
#21 0x00007fcd974d2293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fcd7b7fe700 (LWP 754346)):
#0  0x00007fcd97a8f713 in QListData::end() const (this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qlist.h:118
#1  QList<QTimerInfo*>::constEnd() const (this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qlist.h:345
#2  QTimerInfoList::timerWait(timespec&) (this=this@entry=0x7fcd68000c08, tm=...) at kernel/qtimerinfo_unix.cpp:393
#3  0x00007fcd97a8e774 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fcd68000b60, flags=...) at ../../include/QtCore/../../src/corelib/tools/qrefcount.h:102
#4  0x00007fcd97a351ab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fcd7b7fdcc0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#5  0x00007fcd9784fa12 in QThread::exec() (this=this@entry=0x562b7827ce70) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#6  0x00007fcd962c4fa9 in QQmlThreadPrivate::run() (this=0x562b7827ce70) at qml/ftw/qqmlthread.cpp:155
#7  0x00007fcd97850bac in QThreadPrivate::start(void*) (arg=0x562b7827ce70) at thread/qthread_unix.cpp:329
#8  0x00007fcd96a34609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fcd974d2293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fcd8bfff700 (LWP 754263)):
#0  0x00007fcd974c5bf6 in __ppoll (fds=fds@entry=0x7fcd8400ee58, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1  0x00007fcd97a8ceb9 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7fcd8400ee58) at kernel/qcore_unix.cpp:132
#3  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7fcd8400ee58) at kernel/qcore_unix.cpp:129
#4  qt_safe_poll(pollfd*, unsigned long, timespec const*) (fds=0x7fcd8400ee58, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:155
#5  0x00007fcd97a8e563 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211
#6  0x00007fcd97a351ab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fcd8bffecb0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007fcd9784fa12 in QThread::exec() (this=this@entry=0x7fcd97d76d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007fcd97cf2f4b in QDBusConnectionManager::run() (this=0x7fcd97d76d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:179
#9  0x00007fcd97850bac in QThreadPrivate::start(void*) (arg=0x7fcd97d76d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:329
#10 0x00007fcd96a34609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#11 0x00007fcd974d2293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fcd910e9700 (LWP 754261)):
#0  0x00007fcd974c5aff in __GI___poll (fds=0x7fcd910e8be8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fcd97d83c1a in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fcd97d8590a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fcd911b9d58 in QXcbEventQueue::run() (this=0x562b77e21bf0) at qxcbeventqueue.cpp:228
#4  0x00007fcd97850bac in QThreadPrivate::start(void*) (arg=0x562b77e21bf0) at thread/qthread_unix.cpp:329
#5  0x00007fcd96a34609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fcd974d2293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fcd918f98c0 (LWP 754258)):
#0  __lll_lock_wait (futex=futex@entry=0x7fcd6f3efae0, private=0) at lowlevellock.c:52
#1  0x00007fcd96a37131 in __GI___pthread_mutex_lock (mutex=0x7fcd6f3efae0) at ../nptl/pthread_mutex_lock.c:115
#2  0x00007fcd6e4e52cc in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.450.102.04
#3  0x00007fcd781c30df in  () at /usr/lib/x86_64-linux-gnu/libGLX_nvidia.so.0
#4  0x00007fcd781b8a43 in glXDestroyWindow () at /usr/lib/x86_64-linux-gnu/libGLX_nvidia.so.0
#5  0x00007fcd9019da42 in KWin::GlxBackend::~GlxBackend() (this=0x562b783108c0, __in_chrg=<optimized out>) at ./plugins/platforms/x11/standalone/glxbackend.h:86
#6  0x00007fcd9019dc3d in KWin::GlxBackend::~GlxBackend() (this=0x562b783108c0, __in_chrg=<optimized out>) at ./plugins/platforms/x11/standalone/glxbackend.cpp:115
#7  0x00007fcd785108ef in KWin::SceneOpenGL::~SceneOpenGL() (this=0x562b78107ba0, __in_chrg=<optimized out>) at ./plugins/scenes/opengl/scene_opengl.cpp:363
#8  0x00007fcd7851099d in KWin::SceneOpenGL2::~SceneOpenGL2() (this=0x562b78107ba0, __in_chrg=<optimized out>) at ./plugins/scenes/opengl/scene_opengl.cpp:945
#9  0x00007fcd98e3519d in KWin::Compositor::stop() (this=0x562b77fb2510) at ./composite.cpp:485
#10 KWin::Compositor::stop() (this=0x562b77fb2510) at ./composite.cpp:423
#11 0x00007fcd98e352f1 in KWin::Compositor::reinitialize() (this=0x562b77fb2510) at ./composite.cpp:559
#12 0x00007fcd98dfcc9a in KWin::CompositorDBusInterface::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./obj-x86_64-linux-gnu/kwin_autogen/EWIEGA46WW/moc_dbusinterface.cpp:292
#13 0x00007fcd98e05a83 in KWin::CompositorDBusInterface::qt_metacall(QMetaObject::Call, int, void**) (this=0x562b77f87b70, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0x7fff0bbb6100) at ./obj-x86_64-linux-gnu/kwin_autogen/EWIEGA46WW/moc_dbusinterface.cpp:356
#14 0x00007fcd97cff55b in QDBusConnectionPrivate::deliverCall(QObject*, int, QDBusMessage const&, QVector<int> const&, int) (this=<optimized out>, object=<optimized out>, msg=..., metaTypes=..., slotIdx=<optimized out>) at qdbusintegrator.cpp:1001
#15 0x00007fcd97a64239 in QObject::event(QEvent*) (this=0x562b77f87b70, e=0x7fcd8400ff50) at kernel/qobject.cpp:1314
#16 0x00007fcd985d7dc3 in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x562b77e1e280, receiver=receiver@entry=0x562b77f87b70, e=e@entry=0x7fcd8400ff50) at kernel/qapplication.cpp:3632
#17 0x00007fcd985e0bb8 in QApplication::notify(QObject*, QEvent*) (this=0x7fff0bbb6740, receiver=0x562b77f87b70, e=0x7fcd8400ff50) at kernel/qapplication.cpp:3156
#18 0x00007fcd97a3669a in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x562b77f87b70, event=0x7fcd8400ff50) at ../../include/QtCore/5.15.2/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:325
#19 0x00007fcd97a38fa1 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=0x0, event_type=0, data=0x562b77df6520) at kernel/qcoreapplication.cpp:1817
#20 0x00007fcd97a8e33e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x562b77ed23f0, flags=...) at kernel/qeventdispatcher_unix.cpp:468
#21 0x00007fcd911bb132 in QXcbUnixEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x562b77ed23f0, flags=...) at qxcbeventdispatcher.cpp:60
#22 0x00007fcd97a351ab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fff0bbb6660, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#23 0x00007fcd97a3d354 in QCoreApplication::exec() () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#24 0x0000562b762c8acd in main(int, char**) (argc=<optimized out>, argv=0x7fff0bbb68e8) at ./main_x11.cpp:491
[Inferior 1 (process 754258) detached]

Possible duplicates by query: bug 431328, bug 429383, bug 429344, bug 428581, bug 428149.

Reported using DrKonqi