Application: kwin_x11 (5.5.5) Qt Version: 5.5.1 Operating System: Linux 4.1.26-21-default x86_64 Distribution: "openSUSE Leap 42.1 (x86_64)" -- Information about the crash: - What I was doing when the application crashed: When I try to open cs:go by steam, kwin crash or freeze the panel with a previuos session of process (example: I open it on 12:15 and kwin clock back on previous time like 10:25, probably with all apps loaded on this time) The crash can be reproduced sometimes. -- Backtrace: Application: KWin (kwin_x11), signal: Segmentation fault Using host libthread_db library "/lib64/libthread_db.so.1". [Current thread is 1 (Thread 0x7f94fed82800 (LWP 15108))] Thread 3 (Thread 0x7f94dbfff700 (LWP 15119)): #0 0x00007f94fe6fc253 in select () at /lib64/libc.so.6 #1 0x00007f94fc52d179 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5 #2 0x00007f94fc52eaf5 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5 #3 0x00007f94fc52ef3b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #4 0x00007f94fc4d7d53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #5 0x00007f94fc2f961a in QThread::exec() () at /usr/lib64/libQt5Core.so.5 #6 0x00007f94f6889e18 in () at /usr/lib64/libQt5Qml.so.5 #7 0x00007f94fc2fe32f in () at /usr/lib64/libQt5Core.so.5 #8 0x00007f94fdd2f0a4 in start_thread () at /lib64/libpthread.so.0 #9 0x00007f94fe702fed in clone () at /lib64/libc.so.6 Thread 2 (Thread 0x7f94d9efc700 (LWP 15122)): #0 0x00007f94fdd3303f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0 #1 0x00007f94fb30f86b in () at /usr/lib64/libQt5Script.so.5 #2 0x00007f94fb30f899 in () at /usr/lib64/libQt5Script.so.5 #3 0x00007f94fdd2f0a4 in start_thread () at /lib64/libpthread.so.0 #4 0x00007f94fe702fed in clone () at /lib64/libc.so.6 Thread 1 (Thread 0x7f94fed82800 (LWP 15108)): [KCrash Handler] #6 0x00007f94fe2d7acd in () at /usr/lib64/libkwin.so.5 #7 0x00007f94fe2d7b89 in () at /usr/lib64/libkwin.so.5 #8 0x00007f94fc50ab18 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5 #9 0x00007f94fd1bde7c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #10 0x00007f94fd1c2cc8 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #11 0x00007f94fc4d9e95 in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5 #12 0x00007f94fc4dc057 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5 #13 0x00007f94fc52eec4 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #14 0x00007f94e4c9433d in () at /usr/lib64/libQt5XcbQpa.so.5 #15 0x00007f94fc4d7d53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #16 0x00007f94fc4df8f6 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5 #17 0x00007f94fe9cb9e7 in kdemain () at /usr/lib64/libkdeinit5_kwin_x11.so #18 0x00007f94fe63fb05 in __libc_start_main () at /lib64/libc.so.6 #19 0x000000000040085e in _start () Reported using DrKonqi
> #6 0x00007f94fe2d7acd in () at /usr/lib64/libkwin.so.5 > #7 0x00007f94fe2d7b89 in () at /usr/lib64/libkwin.so.5 lacks any relevant debug symbols. please install the kwin-dbg package, recause the segfault and provide an updated backtrace.
Application: KWin (kwin_x11), signal: Segmentation fault Using host libthread_db library "/lib64/libthread_db.so.1". [Current thread is 1 (Thread 0x7fda0d5ca800 (LWP 8967))] Thread 4 (Thread 0x7fd9f27a9700 (LWP 8970)): #0 0x00007fda0cf42bbd in poll () at /lib64/libc.so.6 #1 0x00007fda0a886422 in () at /usr/lib64/libxcb.so.1 #2 0x00007fda0a88800f in xcb_wait_for_event () at /usr/lib64/libxcb.so.1 #3 0x00007fd9f347c3c9 in () at /usr/lib64/libQt5XcbQpa.so.5 #4 0x00007fda0ab4632f in () at /usr/lib64/libQt5Core.so.5 #5 0x00007fda0c5770a4 in start_thread () at /lib64/libpthread.so.0 #6 0x00007fda0cf4afed in clone () at /lib64/libc.so.6 Thread 3 (Thread 0x7fd9eadee700 (LWP 8978)): #0 0x00007fda0cf44253 in select () at /lib64/libc.so.6 #1 0x00007fda0ad75179 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5 #2 0x00007fda0ad76af5 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5 #3 0x00007fda0ad76f3b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #4 0x00007fda0ad1fd53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #5 0x00007fda0ab4161a in QThread::exec() () at /usr/lib64/libQt5Core.so.5 #6 0x00007fda050d1e18 in () at /usr/lib64/libQt5Qml.so.5 #7 0x00007fda0ab4632f in () at /usr/lib64/libQt5Core.so.5 #8 0x00007fda0c5770a4 in start_thread () at /lib64/libpthread.so.0 #9 0x00007fda0cf4afed in clone () at /lib64/libc.so.6 Thread 2 (Thread 0x7fd9e8f90700 (LWP 8980)): #0 0x00007fda0c57b03f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0 #1 0x00007fda09b5786b in () at /usr/lib64/libQt5Script.so.5 #2 0x00007fda09b57899 in () at /usr/lib64/libQt5Script.so.5 #3 0x00007fda0c5770a4 in start_thread () at /lib64/libpthread.so.0 #4 0x00007fda0cf4afed in clone () at /lib64/libc.so.6 Thread 1 (Thread 0x7fda0d5ca800 (LWP 8967)): [KCrash Handler] #6 0x00007fda0cb1facd in KWin::SceneOpenGLShadow::~SceneOpenGLShadow() (this=0x2ab2c80, __in_chrg=<optimized out>) at /usr/src/debug/kwin-5.5.5/scene_opengl.cpp:2210 #7 0x00007fda0cb1fb89 in KWin::SceneOpenGLShadow::~SceneOpenGLShadow() (this=0x2ab2c80, __in_chrg=<optimized out>) at /usr/src/debug/kwin-5.5.5/scene_opengl.cpp:2213 #8 0x00007fda0ad52b18 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5 #9 0x00007fda0ba05e7c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #10 0x00007fda0ba0acc8 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #11 0x00007fda0ad21e95 in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5 #12 0x00007fda0ad24057 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5 #13 0x00007fda0ad76ec4 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #14 0x00007fd9f34dc33d in () at /usr/lib64/libQt5XcbQpa.so.5 #15 0x00007fda0ad1fd53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #16 0x00007fda0ad278f6 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5 #17 0x00007fda0d2139e7 in kdemain(int, char**) (argc=3, argv=0x7ffe0ceaab78) at /usr/src/debug/kwin-5.5.5/main_x11.cpp:309 #18 0x00007fda0ce87b05 in __libc_start_main () at /lib64/libc.so.6 #19 0x000000000040085e in _start () at ../sysdeps/x86_64/start.S:122
Thanks for adding the backtrace.
This particular crash has been fixed for KWin 5.6 with: commit cae90bb035e6170a9beb38545cf60e31af612804 Author: Thomas Lübking <thomas.luebking@gmail.com> Date: Mon Dec 21 00:18:00 2015 +0100 catch nullptr effects when deleting shadows the shadow can be deleted deferred from an update there's a slight chance, to be eg. triggered by clients blocking compositing, that the compositor is suspended in the same cycle and the effects pointer (and scene and context) thus gone CCBUG: 356938 FIXED-IN: 5.6 REVIEW: 126441