Application: kwin_x11 (5.18.5) Qt Version: 5.12.8 Frameworks Version: 5.68.0 Operating System: Linux 5.4.0-67-generic x86_64 Windowing system: X11 Distribution: Ubuntu 20.04.2 LTS -- Information about the crash: - Unusual behavior I noticed: Just before the crash, the system started to become unresponsive. The crash happened just after starting ungoogled chromium and then going to a website (website was starting to load. No previous issues with accessing the same) - Custom settings of the application: Was using 4 Virtual Desktops (? if that is what they are called) with some load on each. ~ 1 Firefox instance on each with a total of ~8 tabs over all Desktops -- Backtrace: Application: KWin (kwin_x11), signal: Segmentation fault Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [Current thread is 1 (Thread 0x7f0ebb318800 (LWP 1770))] Thread 13 (Thread 0x7f0e91858700 (LWP 64085)): #0 futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55dea2ca87b4) at ../sysdeps/nptl/futex-internal.h:183 #1 __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55dea2ca8760, cond=0x55dea2ca8788) at pthread_cond_wait.c:508 #2 __pthread_cond_wait (cond=0x55dea2ca8788, mutex=0x55dea2ca8760) at pthread_cond_wait.c:638 #3 0x00007f0ec08b8b0f in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55dea2ca8760) at thread/qwaitcondition_unix.cpp:146 #4 QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x55dea2f3a4d0, deadline=...) at thread/qwaitcondition_unix.cpp:225 #5 0x00007f0ec08b8c01 in QWaitCondition::wait(QMutex*, unsigned long) (this=0x55dea2f3a4d8, mutex=0x55dea2f3a4d0, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68 #6 0x00007f0ebf954109 in () at /lib/x86_64-linux-gnu/libQt5Quick.so.5 #7 0x00007f0ebf9543ad in () at /lib/x86_64-linux-gnu/libQt5Quick.so.5 #8 0x00007f0ec08b29d2 in QThreadPrivate::start(void*) (arg=0x55dea2f3a450) at thread/qthread_unix.cpp:361 #9 0x00007f0ebfe70609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #10 0x00007f0ec20df293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 12 (Thread 0x7f0e99858700 (LWP 53148)): #0 0x00007f0ec20d2bf6 in __ppoll (fds=fds@entry=0x7f0e7c087328, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44 #1 0x00007f0ec0ace4a9 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=0x7f0e7c087328) at kernel/qcore_unix.cpp:132 #3 qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f0e7c087328) at kernel/qcore_unix.cpp:129 #4 qt_safe_poll(pollfd*, unsigned long, timespec const*) (fds=0x7f0e7c087328, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:153 #5 0x00007f0ec0acfa14 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211 #6 0x00007f0ec0a794db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f0e99857d80, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140 #7 0x00007f0ec08b1785 in QThread::exec() (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120 #8 0x00007f0ebf5e31a9 in () at /lib/x86_64-linux-gnu/libQt5Qml.so.5 #9 0x00007f0ec08b29d2 in QThreadPrivate::start(void*) (arg=0x55dea22c7b00) at thread/qthread_unix.cpp:361 #10 0x00007f0ebfe70609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #11 0x00007f0ec20df293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 11 (Thread 0x7f0dfa998700 (LWP 36702)): #0 0x00007f0ec0ad1509 in QTimerInfoList::activateTimers() (this=this@entry=0x7f0df4067dc0) at kernel/qtimerinfo_unix.cpp:570 #1 0x00007f0ec0acef10 in QEventDispatcherUNIXPrivate::activateTimers() (this=this@entry=0x7f0df4067d20) at kernel/qeventdispatcher_unix.cpp:249 #2 0x00007f0ec0acfb6f in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:514 #3 0x00007f0ec0a794db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f0dfa997da0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140 #4 0x00007f0ec08b1785 in QThread::exec() (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120 #5 0x00007f0ec08b29d2 in QThreadPrivate::start(void*) (arg=0x55dea257ed80) at thread/qthread_unix.cpp:361 #6 0x00007f0ebfe70609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #7 0x00007f0ec20df293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 10 (Thread 0x7f0eb299c700 (LWP 20376)): #0 futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55dea2c58fa0) at ../sysdeps/nptl/futex-internal.h:183 #1 __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55dea2c58f50, cond=0x55dea2c58f78) at pthread_cond_wait.c:508 #2 __pthread_cond_wait (cond=0x55dea2c58f78, mutex=0x55dea2c58f50) at pthread_cond_wait.c:638 #3 0x00007f0ec08b8b0f in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55dea2c58f50) at thread/qwaitcondition_unix.cpp:146 #4 QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x55dea28cb310, deadline=...) at thread/qwaitcondition_unix.cpp:225 #5 0x00007f0ec08b8c01 in QWaitCondition::wait(QMutex*, unsigned long) (this=0x55dea28cb318, mutex=0x55dea28cb310, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68 #6 0x00007f0ebf954109 in () at /lib/x86_64-linux-gnu/libQt5Quick.so.5 #7 0x00007f0ebf9543ad in () at /lib/x86_64-linux-gnu/libQt5Quick.so.5 #8 0x00007f0ec08b29d2 in QThreadPrivate::start(void*) (arg=0x55dea28cb290) at thread/qthread_unix.cpp:361 #9 0x00007f0ebfe70609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #10 0x00007f0ec20df293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 9 (Thread 0x7f0eb3fff700 (LWP 5488)): #0 futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55dea265f820) at ../sysdeps/nptl/futex-internal.h:183 #1 __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55dea265f7d0, cond=0x55dea265f7f8) at pthread_cond_wait.c:508 #2 __pthread_cond_wait (cond=0x55dea265f7f8, mutex=0x55dea265f7d0) at pthread_cond_wait.c:638 #3 0x00007f0ec08b8b0f in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55dea265f7d0) at thread/qwaitcondition_unix.cpp:146 #4 QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x55dea265f3b0, deadline=...) at thread/qwaitcondition_unix.cpp:225 #5 0x00007f0ec08b8c01 in QWaitCondition::wait(QMutex*, unsigned long) (this=0x55dea265f3b8, mutex=0x55dea265f3b0, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68 #6 0x00007f0ebf954109 in () at /lib/x86_64-linux-gnu/libQt5Quick.so.5 #7 0x00007f0ebf9543ad in () at /lib/x86_64-linux-gnu/libQt5Quick.so.5 #8 0x00007f0ec08b29d2 in QThreadPrivate::start(void*) (arg=0x55dea265f330) at thread/qthread_unix.cpp:361 #9 0x00007f0ebfe70609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #10 0x00007f0ec20df293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 8 (Thread 0x7f0e937ff700 (LWP 1993)): #0 futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f0ec04bbfb8) at ../sysdeps/nptl/futex-internal.h:183 #1 __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7f0ec04bbf68, cond=0x7f0ec04bbf90) at pthread_cond_wait.c:508 #2 __pthread_cond_wait (cond=0x7f0ec04bbf90, mutex=0x7f0ec04bbf68) at pthread_cond_wait.c:638 #3 0x00007f0ec03be5fa in () at /lib/x86_64-linux-gnu/libQt5Script.so.5 #4 0x00007f0ec03be61f in () at /lib/x86_64-linux-gnu/libQt5Script.so.5 #5 0x00007f0ebfe70609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #6 0x00007f0ec20df293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 7 (Thread 0x7f0e9a059700 (LWP 1946)): #0 futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55dea19b3d58) at ../sysdeps/nptl/futex-internal.h:183 #1 __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55dea19b3d08, cond=0x55dea19b3d30) at pthread_cond_wait.c:508 #2 __pthread_cond_wait (cond=0x55dea19b3d30, mutex=0x55dea19b3d08) at pthread_cond_wait.c:638 #3 0x00007f0eb0bf1b5b in () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #4 0x00007f0eb0bf175b in () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #5 0x00007f0ebfe70609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #6 0x00007f0ec20df293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 6 (Thread 0x7f0e92059700 (LWP 1945)): #0 futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55dea19b3d58) at ../sysdeps/nptl/futex-internal.h:183 #1 __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55dea19b3d08, cond=0x55dea19b3d30) at pthread_cond_wait.c:508 #2 __pthread_cond_wait (cond=0x55dea19b3d30, mutex=0x55dea19b3d08) at pthread_cond_wait.c:638 #3 0x00007f0eb0bf1b5b in () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #4 0x00007f0eb0bf175b in () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #5 0x00007f0ebfe70609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #6 0x00007f0ec20df293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 5 (Thread 0x7f0e9a85a700 (LWP 1944)): #0 futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55dea19b3d58) at ../sysdeps/nptl/futex-internal.h:183 #1 __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55dea19b3d08, cond=0x55dea19b3d30) at pthread_cond_wait.c:508 #2 __pthread_cond_wait (cond=0x55dea19b3d30, mutex=0x55dea19b3d08) at pthread_cond_wait.c:638 #3 0x00007f0eb0bf1b5b in () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #4 0x00007f0eb0bf175b in () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #5 0x00007f0ebfe70609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #6 0x00007f0ec20df293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 4 (Thread 0x7f0e9b05b700 (LWP 1943)): #0 futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55dea19b3d58) at ../sysdeps/nptl/futex-internal.h:183 #1 __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55dea19b3d08, cond=0x55dea19b3d30) at pthread_cond_wait.c:508 #2 __pthread_cond_wait (cond=0x55dea19b3d30, mutex=0x55dea19b3d08) at pthread_cond_wait.c:638 #3 0x00007f0eb0bf1b5b in () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #4 0x00007f0eb0bf175b in () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so #5 0x00007f0ebfe70609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #6 0x00007f0ec20df293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 3 (Thread 0x7f0eb37fe700 (LWP 1932)): #0 0x00007f0ec20d2bf6 in __ppoll (fds=fds@entry=0x7f0ea0000d68, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44 #1 0x00007f0ec0ace4a9 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=0x7f0ea0000d68) at kernel/qcore_unix.cpp:132 #3 qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f0ea0000d68) at kernel/qcore_unix.cpp:129 #4 qt_safe_poll(pollfd*, unsigned long, timespec const*) (fds=0x7f0ea0000d68, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:153 #5 0x00007f0ec0acfa14 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211 #6 0x00007f0ec0a794db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f0eb37fdd80, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140 #7 0x00007f0ec08b1785 in QThread::exec() (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120 #8 0x00007f0ebf5e31a9 in () at /lib/x86_64-linux-gnu/libQt5Qml.so.5 #9 0x00007f0ec08b29d2 in QThreadPrivate::start(void*) (arg=0x55dea19c41c0) at thread/qthread_unix.cpp:361 #10 0x00007f0ebfe70609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #11 0x00007f0ec20df293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 2 (Thread 0x7f0eb9c17700 (LWP 1824)): #0 0x00007f0ec20d2bf6 in __ppoll (fds=fds@entry=0x7f0eac00b648, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44 #1 0x00007f0ec0ace4a9 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=0x7f0eac00b648) at kernel/qcore_unix.cpp:132 #3 qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f0eac00b648) at kernel/qcore_unix.cpp:129 #4 qt_safe_poll(pollfd*, unsigned long, timespec const*) (fds=0x7f0eac00b648, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:153 #5 0x00007f0ec0acfa14 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211 #6 0x00007f0ec0a794db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f0eb9c16d70, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140 #7 0x00007f0ec08b1785 in QThread::exec() (this=this@entry=0x7f0ec1b66d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120 #8 0x00007f0ec1ae3efa in QDBusConnectionManager::run() (this=0x7f0ec1b66d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178 #9 0x00007f0ec08b29d2 in QThreadPrivate::start(void*) (arg=0x7f0ec1b66d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:361 #10 0x00007f0ebfe70609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #11 0x00007f0ec20df293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 1 (Thread 0x7f0ebb318800 (LWP 1770)): [KCrash Handler] #5 0x00007f0ec1db457e in KWin::Workspace::workspaceEvent(xcb_generic_event_t*) () at /lib/x86_64-linux-gnu/libkwin.so.5 #6 0x00007f0ec0a77d8f in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) (this=<optimized out>, eventType=..., message=0x7f0eb407b140, result=0x7fffa4d8e428) at kernel/qabstracteventdispatcher.cpp:484 #7 0x00007f0ebac337b5 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #8 0x00007f0ebac3478a in QXcbConnection::processXcbEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #9 0x00007f0ebac5f6f0 in () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #10 0x00007f0ec0a794db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fffa4d8e5b0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140 #11 0x00007f0ec0a81246 in QCoreApplication::exec() () at ../../include/QtCore/../../src/corelib/global/qflags.h:120 #12 0x00007f0ec21b89ef in kdemain () at /lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so #13 0x00007f0ec1fe40b3 in __libc_start_main (main=0x55de9fca3060, argc=1, argv=0x7fffa4d8e848, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffa4d8e838) at ../csu/libc-start.c:308 #14 0x000055de9fca309e in _start () [Inferior 1 (process 1770) detached] Possible duplicates by query: bug 434372, bug 434368, bug 431795, bug 431564, bug 430945. Reported using DrKonqi
*** This bug has been marked as a duplicate of bug 423319 ***