479791 – kwin_x11 crashed at KWin::Compositor::compositingToggled when I alt+tabbed from a game

Bug 479791 - kwin_x11 crashed at KWin::Compositor::compositingToggled when I alt+tabbed from a game

Summary: kwin_x11 crashed at KWin::Compositor::compositingToggled when I alt+tabbed fr...

Status:	RESOLVED FIXED

Alias:	None

Product:	kwin
Classification:	Plasma
Component:	compositing (show other bugs)
Version:	master
Platform:	openSUSE Linux

Importance:	NOR crash
Target Milestone:	---
Assignee:	KWin default assignee

URL:
Keywords:	drkonqi, qt6

Depends on:
Blocks:

Reported:	2024-01-14 09:36 UTC by Fushan Wen
Modified:	2024-01-15 14:37 UTC (History)
CC List:	0 users

See Also:
Latest Commit:	https://invent.kde.org/plasma/kwin/-/commit/3a37f8dbb29daad31a340cd5b69b3c932a910240
Version Fixed In:
Sentry Crash Report:

Flags:	qydwhotmail: X11+

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Description Fushan Wen 2024-01-14 09:36:30 UTC

SUMMARY
When I press Alt+Tab to switch from a fullscreen game window, kwin_x11 often crashes.


STEPS TO REPRODUCE
1. Start "Haunted House" from Steam with Proton Experimental
2. Set the game window to fullscreen
3. Press Alt+Tab

OBSERVED RESULT
The window decoration sometimes disappears, which means kwin_x11 sometimes crashes.

EXPECTED RESULT
No crash

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 6.0 RC1
KDE Frameworks Version: 
Qt Version: 6.6.1

ADDITIONAL INFORMATION
(gdb) bt
#0  0x00007f55ae491dec in __pthread_kill_implementation () at /lib64/libc.so.6
#1  0x00007f55ae43f0c6 in raise () at /lib64/libc.so.6
#2  0x00007f55b20fdb93 in KCrash::defaultCrashHandler(int) () at /lib64/libKF6Crash.so.6
#3  0x00007f55ae43f190 in <signal handler called> () at /lib64/libc.so.6
#4  0x00007f55b1bc6f2f in  () at /lib64/libkwin.so.6
#5  0x00007f55aedda613 in QtPrivate::QSlotObjectBase::call(QObject*, void**)
    (a=0x7ffd610630b0, r=0x564e038482c0, this=0x564e03e27d50)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/build/include/QtCore/../../../src/corelib/kernel/qobjectdefs_impl.h:433
#6  doActivate<false>(QObject*, int, void**) (sender=0x564e02986b70, signal_index=3, argv=0x7ffd610630b0)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/src/corelib/kernel/qobject.cpp:4021
#7  0x00007f55b1a38a7f in KWin::Compositor::compositingToggled(bool) () at /lib64/libkwin.so.6
#8  0x00007f55b1a3eec0 in KWin::X11Compositor::stop() () at /lib64/libkwin.so.6
#9  0x00007f55aedca96e in QObject::event(QEvent*) (this=0x564e02986b70, e=0x564e02975120)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/src/corelib/kernel/qobject.cpp:1437
#10 0x00007f55affc094e in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt6Widgets.so.6
#11 0x00007f55aed87268 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
    (receiver=0x564e02986b70, event=0x564e02975120)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/src/corelib/kernel/qcoreapplication.cpp:1121
#12 0x00007f55aed872a9 in QCoreApplication::sendEvent(QObject*, QEvent*)
    (receiver=<optimized out>, event=<optimized out>)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/src/corelib/kernel/qcoreapplication.cpp:1539
#13 0x00007f55aed875c7 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*)
    (receiver=0x0, event_type=0, data=0x564e0258df10)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/src/corelib/kernel/qcoreapplication.cpp:1901
#14 0x00007f55aefa5d83 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x564e0266ab40)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/src/corelib/kernel/qeventdispatcher_glib.cpp:243
#15 0x00007f55add13f30 in  () at /lib64/libglib-2.0.so.0
#16 0x00007f55add15b58 in  () at /lib64/libglib-2.0.so.0
#17 0x00007f55add1620c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
--Type <RET> for more, q to quit, c to continue without paging--c
#18 0x00007f55aefab12c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
    (this=0x564e0263ea00, flags=...)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/src/corelib/kernel/qeventdispatcher_glib.cpp:393
#19 0x00007f55aed91adb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7ffd610634f0, flags=...)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/build/include/QtCore/../../../src/corelib/global/qflags.h:34
#20 0x00007f55aed8b706 in QCoreApplication::exec() ()
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/build/include/QtCore/../../../src/corelib/global/qflags.h:74
#21 0x0000564e020b50b0 in  ()
#22 0x00007f55ae4281b0 in __libc_start_call_main () at /lib64/libc.so.6
#23 0x00007f55ae428279 in __libc_start_main_impl () at /lib64/libc.so.6
#24 0x0000564e020b94a5 in  ()

Comment 1 Vlad Zahorodnii 2024-01-15 09:24:57 UTC

Please provide a backtrace with debug symbols

Comment 2 Fushan Wen 2024-01-15 11:57:14 UTC

#0  0x00007f3408a91dec in __pthread_kill_implementation () at /lib64/libc.so.6
#1  0x00007f3408a3f0c6 in raise () at /lib64/libc.so.6
#2  0x00007f340c63cb93 in KCrash::defaultCrashHandler(int) () at /lib64/libKF6Crash.so.6
#3  0x00007f3408a3f190 in <signal handler called> () at /lib64/libc.so.6
#4  0x00007f340c1c930f in KWin::useGlThumbnails ()
    at /usr/src/debug/kwin-5.91.90git.20240113T223915~1fd5a655/src/scripting/windowthumbnailitem.cpp:36
#5  KWin::WindowThumbnailItem::updateSource() (this=0x564a19530c20)
    at /usr/src/debug/kwin-5.91.90git.20240113T223915~1fd5a655/src/scripting/windowthumbnailitem.cpp:282
#6  0x00007f34093da613 in QtPrivate::QSlotObjectBase::call(QObject*, void**)
    (a=0x7ffc0625a090, r=0x564a19530c20, this=0x564a194e1b90)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/build/include/QtCore/../../../src/corelib/kernel/qobjectdefs_impl.h:433
#7  doActivate<false>(QObject*, int, void**) (sender=0x564a18080db0, signal_index=3, argv=0x7ffc0625a090)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/src/corelib/kernel/qobject.cpp:4021
#8  0x00007f340c038a9f in KWin::Compositor::compositingToggled(bool)
    (this=this@entry=0x564a18080db0, _t1=<optimized out>, _t1@entry=false)
    at /usr/src/debug/kwin-5.91.90git.20240113T223915~1fd5a655/build/src/kwin_autogen/include/moc_compositor.cpp:245
#9  0x00007f340c03eee0 in KWin::X11Compositor::stop() (this=0x564a18080db0)
    at /usr/src/debug/kwin-5.91.90git.20240113T223915~1fd5a655/src/compositor_x11.cpp:402
#10 KWin::X11Compositor::stop() (this=0x564a18080db0)
    at /usr/src/debug/kwin-5.91.90git.20240113T223915~1fd5a655/src/compositor_x11.cpp:359
#11 0x00007f34093ca96e in QObject::event(QEvent*) (this=0x564a18080db0, e=0x564a195a3ab0)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/src/corelib/kernel/qobject.cpp:1437
#12 0x00007f340a5c094e in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt6Widgets.so.6
#13 0x00007f3409387268 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
    (receiver=0x564a18080db0, event=0x564a195a3ab0)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/src/corelib/kernel/qcoreapplication.cpp:1121
#14 0x00007f34093872a9 in QCoreApplication::sendEvent(QObject*, QEvent*)
    (receiver=<optimized out>, event=<optimized out>)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/src/corelib/kernel/qcoreapplication.cpp:1539
#15 0x00007f34093875c7 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*)
    (receiver=0x0, event_type=0, data=0x564a17cadf10)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/src/corelib/kernel/qcoreapplication.cpp:1901
#16 0x00007f34095a5d83 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x564a17d84590)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/src/corelib/kernel/qeventdispatcher_glib.cpp:243
#17 0x00007f3408313f30 in  () at /lib64/libglib-2.0.so.0
#18 0x00007f3408315b58 in  () at /lib64/libglib-2.0.so.0
#19 0x00007f340831620c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#20 0x00007f34095ab12c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
    (this=0x564a17d5bd40, flags=...)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/src/corelib/kernel/qeventdispatcher_glib.cpp:393
#21 0x00007f3409391adb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
    (this=0x7ffc0625a4d0, flags=...)
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/build/include/QtCore/../../../src/corelib/global/qflags.h:34
#22 0x00007f340938b706 in QCoreApplication::exec() ()
    at /usr/src/debug/qtbase-everywhere-src-6.6.1/build/include/QtCore/../../../src/corelib/global/qflags.h:74
#23 0x0000564a1783e0b0 in  ()
#24 0x00007f3408a281b0 in __libc_start_call_main () at /lib64/libc.so.6
#25 0x00007f3408a28279 in __libc_start_main_impl () at /lib64/libc.so.6
#26 0x0000564a178424a5 in  ()

Comment 3 Bug Janitor Service 2024-01-15 12:53:00 UTC

A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/4927

Comment 4 Vlad Zahorodnii 2024-01-15 14:18:00 UTC

Git commit 4f8c941bff507bf1e1baaf9ab13e141a8e61a316 by Vlad Zahorodnii.
Committed on 15/01/2024 at 15:07.
Pushed by vladz into branch 'master'.

scripting: Fix a crash in useGlThumbnails() when compositing is off

M  +1    -1    src/scripting/windowthumbnailitem.cpp

https://invent.kde.org/plasma/kwin/-/commit/4f8c941bff507bf1e1baaf9ab13e141a8e61a316

Comment 5 Vlad Zahorodnii 2024-01-15 14:37:42 UTC

Git commit 3a37f8dbb29daad31a340cd5b69b3c932a910240 by Vlad Zahorodnii.
Committed on 15/01/2024 at 15:24.
Pushed by vladz into branch 'Plasma/6.0'.

scripting: Fix a crash in useGlThumbnails() when compositing is off


(cherry picked from commit 4f8c941bff507bf1e1baaf9ab13e141a8e61a316)

M  +1    -1    src/scripting/windowthumbnailitem.cpp

https://invent.kde.org/plasma/kwin/-/commit/3a37f8dbb29daad31a340cd5b69b3c932a910240