Application: kded4 ($Id$) KDE Platform Version: 4.10.2 Qt Version: 4.8.4 Operating System: Linux 3.8.0-19-generic x86_64 Distribution: Ubuntu 13.04 -- Information about the crash: I was resizing the guest windows (kubuntu 13.04) when I got a crash report. Virtualbox 4 on a windows 8 host. -- Backtrace: Application: KDE Daemon (kdeinit4), signal: Segmentation fault Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [Current thread is 1 (Thread 0x7f0b366f77c0 (LWP 1700))] Thread 5 (Thread 0x7f0b0e964700 (LWP 1717)): #0 0x00007f0b33f5f3cd in poll () at ../sysdeps/unix/syscall-template.S:81 #1 0x00007f0b310a71dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f0b310a76ba in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f0b0ec544f6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 #4 0x00007f0b310caeb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #5 0x00007f0b3177bf8e in start_thread (arg=0x7f0b0e964700) at pthread_create.c:311 #6 0x00007f0b33f6be1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113 Thread 4 (Thread 0x7f0b0df57700 (LWP 1718)): #0 0x00007f0b33f5f3cd in poll () at ../sysdeps/unix/syscall-template.S:81 #1 0x00007f0b310a71dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f0b310a7304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f0b35391036 in QEventDispatcherGlib::processEvents (this=0x7f0b000008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426 #4 0x00007f0b3536138f in QEventLoop::processEvents (this=this@entry=0x7f0b0df56d80, flags=...) at kernel/qeventloop.cpp:149 #5 0x00007f0b35361618 in QEventLoop::exec (this=this@entry=0x7f0b0df56d80, flags=...) at kernel/qeventloop.cpp:204 #6 0x00007f0b35263410 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542 #7 0x00007f0b18c426e5 in KCupsConnection::run() () from /usr/lib/libkcupslib.so #8 0x00007f0b35265bec in QThreadPrivate::start (arg=0x272e0c0) at thread/qthread_unix.cpp:338 #9 0x00007f0b3177bf8e in start_thread (arg=0x7f0b0df57700) at pthread_create.c:311 #10 0x00007f0b33f6be1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113 Thread 3 (Thread 0x7f0b0d756700 (LWP 1719)): #0 0x00007f0b33f5f3cd in poll () at ../sysdeps/unix/syscall-template.S:81 #1 0x00007f0b310a71dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f0b310a7304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f0b35391036 in QEventDispatcherGlib::processEvents (this=0x7f0afc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426 #4 0x00007f0b3536138f in QEventLoop::processEvents (this=this@entry=0x7f0b0d755dc0, flags=...) at kernel/qeventloop.cpp:149 #5 0x00007f0b35361618 in QEventLoop::exec (this=this@entry=0x7f0b0d755dc0, flags=...) at kernel/qeventloop.cpp:204 #6 0x00007f0b35263410 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542 #7 0x00007f0b35265bec in QThreadPrivate::start (arg=0x270d8b0) at thread/qthread_unix.cpp:338 #8 0x00007f0b3177bf8e in start_thread (arg=0x7f0b0d756700) at pthread_create.c:311 #9 0x00007f0b33f6be1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113 Thread 2 (Thread 0x7f0b0cf55700 (LWP 1720)): #0 0x00007fff1abfe70c in ?? () #1 0x00007f0b0cf54aa0 in ?? () #2 0x00007fff1abfeac9 in ?? () #3 0x00007f0b0cf54af0 in ?? () #4 0x00000001f4002f30 in ?? () #5 0x00007f0af4002860 in ?? () #6 0x00007f0b0cf54b80 in ?? () #7 0x00007f0b0cf54c38 in ?? () #8 0x0000000000000000 in ?? () Thread 1 (Thread 0x7f0b366f77c0 (LWP 1700)): [KCrash Handler] #6 KScreen::Mode::refreshRate (this=this@entry=0x0) at /build/buildd/libkscreen-0.0.81/src/mode.cpp:99 #7 0x00007f0b1a94bd59 in Serializer::saveConfig (config=<optimized out>) at /build/buildd/kscreen-0.0.81/kded/serializer.cpp:129 #8 0x00007f0b1a94823d in KScreenDaemon::saveCurrentConfig (this=0x27103b0) at /build/buildd/kscreen-0.0.81/kded/daemon.cpp:129 #9 0x00007f0b3537c5be in QObject::event (this=0x27103b0, e=<optimized out>) at kernel/qobject.cpp:1194 #10 0x00007f0b347088ec in QApplicationPrivate::notify_helper (this=this@entry=0x2536a10, receiver=receiver@entry=0x27103b0, e=e@entry=0x2849f80) at kernel/qapplication.cpp:4567 #11 0x00007f0b3470b25b in QApplication::notify (this=this@entry=0x7fff1ab1eb30, receiver=receiver@entry=0x27103b0, e=e@entry=0x2849f80) at kernel/qapplication.cpp:4428 #12 0x00007f0b360e5af6 in KApplication::notify (this=0x7fff1ab1eb30, receiver=0x27103b0, event=0x2849f80) at ../../kdeui/kernel/kapplication.cpp:311 #13 0x00007f0b3536263e in QCoreApplication::notifyInternal (this=0x7fff1ab1eb30, receiver=receiver@entry=0x27103b0, event=event@entry=0x2849f80) at kernel/qcoreapplication.cpp:946 #14 0x00007f0b35366171 in sendEvent (event=0x2849f80, receiver=0x27103b0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231 #15 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x24a1150) at kernel/qcoreapplication.cpp:1570 #16 0x00007f0b353664a3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1463 #17 0x00007f0b35390e83 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236 #18 postEventSourceDispatch (s=0x2534fe0) at kernel/qeventdispatcher_glib.cpp:279 #19 0x00007f0b310a6f05 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #20 0x00007f0b310a7248 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #21 0x00007f0b310a7304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #22 0x00007f0b35391016 in QEventDispatcherGlib::processEvents (this=0x24a3670, flags=...) at kernel/qeventdispatcher_glib.cpp:424 #23 0x00007f0b347ae1ae in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204 #24 0x00007f0b3536138f in QEventLoop::processEvents (this=this@entry=0x7fff1ab1e8b0, flags=...) at kernel/qeventloop.cpp:149 #25 0x00007f0b35361618 in QEventLoop::exec (this=this@entry=0x7fff1ab1e8b0, flags=...) at kernel/qeventloop.cpp:204 #26 0x00007f0b35366cf6 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218 #27 0x00007f0b34706ffc in QApplication::exec () at kernel/qapplication.cpp:3828 #28 0x00007f0b21085050 in kdemain (argc=1, argv=0x251a400) at ../../kded/kded.cpp:924 #29 0x00000000004084ea in launch (argc=argc@entry=1, _name=_name@entry=0x40b167 "kded4", args=args@entry=0x0, cwd=cwd@entry=0x0, envc=envc@entry=0, envs=<optimized out>, envs@entry=0x0, reset_env=reset_env@entry=false, tty=tty@entry=0x0, avoid_loops=avoid_loops@entry=false, startup_id_str=startup_id_str@entry=0x40aff6 "0") at ../../kinit/kinit.cpp:738 #30 0x0000000000405b69 in main (argc=4, argv=<optimized out>, envp=0x7fff1ab1f530) at ../../kinit/kinit.cpp:1853 Reported using DrKonqi
Could you please run "kscreen-console bug" and post it's output here?
Managed to reproduce with F19 in VirtualBox with Guest Additions installed. Looks like a race condition when the window is being resized to quickly and too many events are generated at once.
Git commit ba0bb9abefa15bb2b6e773074e870491c8501761 by Dan Vrátil. Committed on 10/06/2013 at 12:13. Pushed by dvratil into branch 'master'. Day call to saveCurrentConfig() to prevent crash in case of multiple events This can happen in VirtualBox for instance, where resizing window emits a lot of XRandR events which causes inconsistancies in configs. REVIEW: 110930 FIXED-IN: 1.0 M +12 -9 kded/daemon.cpp M +1 -1 kded/daemon.h http://commits.kde.org/kscreen/ba0bb9abefa15bb2b6e773074e870491c8501761