Bug 367767

Application: dolphin (15.12.3)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-34-generic x86_64
Distribution: Ubuntu 16.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:
The computer is locked screen, when type the password, dolphin crash, the second monitor background turn black, the virtual machine with virtualbox closed.

- Unusual behavior I noticed:
When press ctrl + alt + L, to lock screen the computer freeze.

- Custom settings of the application:
Problems with virtualbox, dolphin and lock screen

The crash can be reproduced every time.

-- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7efe195228c0 (LWP 4819))]

Thread 3 (Thread 0x7efe0953d700 (LWP 4859)):
#0  0x00007efe2c33ae8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007efe22b2f39c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efe22b2f4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efe27143a9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efe270eadea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efe26f078a4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007efe26f0c84e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007efe236ba6fa in start_thread (arg=0x7efe0953d700) at pthread_create.c:333
#8  0x00007efe2c346b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7efe16cf0700 (LWP 4820)):
#0  0x00007efe2c33ae8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007efe20ac6c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007efe20ac88d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007efe19042629 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007efe26f0c84e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efe236ba6fa in start_thread (arg=0x7efe16cf0700) at pthread_create.c:333
#6  0x00007efe2c346b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7efe195228c0 (LWP 4819)):
[KCrash Handler]
#6  0x00007efe19058875 in QXcbWindow::mapFromNative(QRect const&, QXcbScreen const*) const () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#7  0x00007efe1905f3f2 in QXcbWindow::handleConfigureNotifyEvent(xcb_configure_notify_event_t const*) () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#8  0x00007efe1904440d in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#9  0x00007efe19044e53 in QXcbConnection::processXcbEvents() () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#10 0x00007efe2711cea1 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007efe27bf005c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007efe27bf5516 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007efe270ed62b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007efe270efa26 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007efe27143673 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007efe22b2f1a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007efe22b2f400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007efe22b2f4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007efe27143a7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007efe270eadea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007efe270f2e8c in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007efe2c666e2b in kdemain () from /usr/lib/x86_64-linux-gnu/libkdeinit5_dolphin.so
#23 0x00007efe2c260830 in __libc_start_main (main=0x400710 <main>, argc=1, argv=0x7fff2bd18fb8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff2bd18fa8) at ../csu/libc-start.c:291
#24 0x0000000000400749 in _start ()

Possible duplicates by query: bug 358419.

Reported using DrKonqi