438802 2021-06-17 13:10:08 +0000 kwin crash on Alt+Tab, reproducible 2021-06-17 18:16:29 +0000 1 1 4 Plasma kwin general 5.19.5 Ubuntu Linux RESOLVED DUPLICATE 346519 drkonqi NOR crash --- 0 philwhite0 kwin-bugs-null nate 0 oldest_to_newest 2041675 0 philwhite0 2021-06-17 13:10:08 +0000 Application: kwin_x11 (5.19.5) Qt Version: 5.14.2 Frameworks Version: 5.74.0 Operating System: Linux 5.8.0-55-generic x86_64 Windowing system: X11 Distribution: Ubuntu 20.10 -- Information about the crash: - What I was doing when the application crashed: I had a few VS Code windows open, a Konsole window, and Firefox. I use Alt+Tab extensively and it crashes kwin regularly since my last Ubuntu update using Discover. The crash can be reproduced every time. -- Backtrace: Application: KWin (kwin_x11), signal: Aborted [KCrash Handler] #4 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:49 #5 0x00007f0e72646864 in __GI_abort () at abort.c:79 #6 0x00007f0e72aa5ba3 in QMessageLogger::fatal(char const*, ...) const () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007f0e7189eade in QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) () from /lib/x86_64-linux-gnu/libQt5Quick.so.5 #8 0x00007f0e718a098e in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5 #9 0x00007f0e718a177b in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5 #10 0x00007f0e7309f7c5 in QWindow::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5 #11 0x00007f0e73778013 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5 #12 0x00007f0e72cc21ca in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #13 0x00007f0e730949a1 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5 #14 0x00007f0e730692bb in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5 #15 0x00007f0e6ca3f747 in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #16 0x00007f0e72cc0a4b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #17 0x00007f0e72cc8fc6 in QCoreApplication::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #18 0x000055c8f75d7a6d in ?? () #19 0x00007f0e72648cb2 in __libc_start_main (main=0x55c8f75d76a0, argc=3, argv=0x7ffc10b94458, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc10b94448) at ../csu/libc-start.c:314 #20 0x000055c8f75d7f8e in _start () [Inferior 1 (process 53045) detached] Possible duplicates by query: bug 437761, bug 437693, bug 436607, bug 436528, bug 436520. Reported using DrKonqi 2041681 1 philwhite0 2021-06-17 13:19:53 +0000 Note that I have since rebooted and the problem has not recurred. I will update this report if it happens again. 2041783 2 nate 2021-06-17 18:16:29 +0000 Fixed in a later version of KDE frameworks. I would recommend upgrading to Kubuntu 21.04. *** This bug has been marked as a duplicate of bug 346519 ***