https://bugs.kde.org/show_bug.cgi?id=399836
Bug ID: 399836
Summary: kwin crash on changing virtual desktop
Product: kwin
Version: 5.12.6
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Keywords: drkonqi
Severity: crash
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: stamatis.kavvad...@gmail.com
Target Milestone: ---
Application: kwin_x11 (5.12.6)
Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-34-generic x86_64
Distribution: Ubuntu 18.04.1 LTS
-- Information about the crash:
Windows lose titlebar; I cannot change the focus with the mouse or with
ALT-tab; the focused application is not responsive to the keyboard or the
mouse; mouse is the only think moving; some lost titlebar usually allows mouse
access to the desktop background and I can right-click and select Execute
command... to run kwin --replace, which restores normal functionality. If I
remember correctly, I can also go to a terminal, with CTRL-ALT-F1/F2 etc during
the crash. Windows from all activities appear in a single activity, but retain
their virtual desktop, on restore from the crash --I cannot say if this is also
the case during the crash.
- What I was doing when the application crashed:
The crash happens repeatedly, when changing virtual desktop, using the keyboard
shortcut (CTRL-ALT-left/right/up/down arrow). Usually, after I have been
viewing idly a window for some time; more frequently when I was viewing idly
for more than a minut, but it also happens after only 5-10 seconds sometimes.
The crash can be reproduced sometimes.
-- 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 0x7ff0a4aa7cc0 (LWP 9737))]
Thread 3 (Thread 0x7fefb9f12700 (LWP 9749)):
#0 0x00007ff09d4739f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7ff0a0a0afb8) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1 0x00007ff09d4739f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7ff0a0a0af68, cond=0x7ff0a0a0af90) at pthread_cond_wait.c:502
#2 0x00007ff09d4739f3 in __pthread_cond_wait (cond=0x7ff0a0a0af90,
mutex=0x7ff0a0a0af68) at pthread_cond_wait.c:655
#3 0x00007ff0a07145f4 in () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4 0x00007ff0a0714639 in () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5 0x00007ff09d46d6db in start_thread (arg=0x7fefb9f12700) at
pthread_create.c:463
#6 0x00007ff0a441388f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 2 (Thread 0x7ff088847700 (LWP 9739)):
#0 0x00007ffc4dd1ab62 in clock_gettime ()
#1 0x00007ff0a4422ea6 in __GI___clock_gettime (clock_id=1, tp=0x7ff088846b80)
at ../sysdeps/unix/clock_gettime.c:115
#2 0x00007ff0a180c221 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3 0x00007ff0a180aa59 in QTimerInfoList::updateCurrentTime() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4 0x00007ff0a180b035 in QTimerInfoList::timerWait(timespec&) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x00007ff0a1809fe4 in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6 0x00007ff0a17b19ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7 0x00007ff0a15d022a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8 0x00007ff09ae32d45 in () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9 0x00007ff0a15d516d in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007ff09d46d6db in start_thread (arg=0x7ff088847700) at
pthread_create.c:463
#11 0x00007ff0a441388f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 1 (Thread 0x7ff0a4aa7cc0 (LWP 9737)):
[KCrash Handler]
#6 0x00007ff0a3f9322d in KWin::Xcb::Extensions::init() () at
/usr/lib/x86_64-linux-gnu/libkwin.so.5
#7 0x00007ff0a3f93ad7 in KWin::Xcb::Extensions::self() () at
/usr/lib/x86_64-linux-gnu/libkwin.so.5
#8 0x00007ff0a3f03a8a in
KWin::Application::updateX11Time(xcb_generic_event_t*) () at
/usr/lib/x86_64-linux-gnu/libkwin.so.5
#9 0x00007ff0a3f03b32 in () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#10 0x00007ff0a17b058f in
QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007ff08c005820 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*)
() at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#12 0x00007ff08c0064ac in QXcbConnection::processXcbEvents() () at
/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#13 0x00007ff0a17e3122 in QObject::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007ff0a253182c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007ff0a25390f4 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007ff0a17b39a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007ff0a17b611d in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007ff0a1809af4 in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007ff08c0675cd in () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#20 0x00007ff0a17b19ea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007ff0a17baa84 in QCoreApplication::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007ff0a46ebdbb in kdemain () at
/usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#23 0x00007ff0a4313b97 in __libc_start_main (main=0x55a089d2b730, argc=2,
argv=0x7ffc4dc50a18, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffc4dc50a08) at ../csu/libc-start.c:310
#24 0x000055a089d2b76a in _start ()
Possible duplicates by query: bug 352971.
Reported using DrKonqi
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