Bug 455399

Application: kwin_x11 (5.24.4)

Qt Version: 5.15.3
Frameworks Version: 5.92.0
Operating System: Linux 5.15.0-37-generic x86_64
Windowing System: X11
Distribution: Ubuntu 22.04 LTS
DrKonqi: 5.24.4 [KCrashBackend]

-- Information about the crash:
- What I was doing when the application crashed:
I was not using notebook for a while and when it dimms I moved mouse. Then it reported KWin crash.

- Unusual behavior I noticed:
KWin is crashing often since I upgraded Kubuntu 20.4 -> 22.4.
Since upgrade I observer that screen turns black for something like half a second up to few second withouth any obvious reasons. Absolutely unpredictable. I observe it on avery system upgraded to 22.4

The reporter is unsure if this crash is reproducible.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault

[KCrash Handler]
#4  0x0000000800000001 in ?? ()
#5  0x00007f6a8cc5cb46 in KWin::Toplevel::isOnOutput(KWin::AbstractOutput*) const () from /lib/x86_64-linux-gnu/libkwin.so.5
#6  0x00007f6a8cc957ed in KWin::Workspace::activeOutput() const () from /lib/x86_64-linux-gnu/libkwin.so.5
#7  0x00007f6a8cc62e17 in KWin::Toplevel::isOnActiveOutput() const () from /lib/x86_64-linux-gnu/libkwin.so.5
#8  0x00007f6a8cb74f49 in KWin::Workspace::takeActivity(KWin::AbstractClient*, QFlags<KWin::Workspace::ActivityFlag>) () from /lib/x86_64-linux-gnu/libkwin.so.5
#9  0x00007f6a8cc870c3 in KWin::Workspace::delayFocus() () from /lib/x86_64-linux-gnu/libkwin.so.5
#10 0x00007f6a8b161783 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f6a8b1657ee in QTimer::timeout(QTimer::QPrivateSignal) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f6a8b15732f in QObject::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f6a8a702713 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f6a8b129e2a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f6a8b1823db in QTimerInfoList::activateTimers() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f6a8b180897 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f6a84c87142 in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#18 0x00007f6a8b12874b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f6a8b130ce4 in QCoreApplication::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x000055cf7b43bbad in ?? ()
#21 0x00007f6a89fd0d90 in __libc_start_call_main (main=main@entry=0x55cf7b43b770, argc=argc@entry=3, argv=argv@entry=0x7ffd26f00508) at ../sysdeps/nptl/libc_start_call_main.h:58
#22 0x00007f6a89fd0e40 in __libc_start_main_impl (main=0x55cf7b43b770, argc=3, argv=0x7ffd26f00508, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd26f004f8) at ../csu/libc-start.c:392
#23 0x000055cf7b43ceb5 in ?? ()
[Inferior 1 (process 475858) detached]

Possible duplicates by query: bug 454681, bug 453117, bug 453089, bug 452997, bug 452083.

Reported using DrKonqi