SUMMARY KMail randomly freezes in the Wayland session. This can happen at any moment, either a few seconds after I open it or after some minutes. STEPS TO REPRODUCE 1. Open KMail in the Wayland session 2. Open and scroll emails for a while OBSERVED RESULT KMail freezes. It is necessary to close it. EXPECTED RESULT KMail should keep working normally. SOFTWARE/OS VERSIONS KMail version: 19.04.2 Linux/KDE Plasma: 5.1.15-arch1 KDE Plasma Version: 5.16.2 KDE Frameworks Version: 5.59.0 Qt Version: 5.13.0
I have caught KMail deadlocking here: #0 0x00007fd0e501de3d in syscall () from /usr/lib/libc.so.6 #1 0x00007fd0e53947b6 in QBasicMutex::lockInternal() () from /usr/lib/libQt5Core.so.5 #2 0x00007fd0cdb8ab3a in QtWaylandClient::QWaylandWindow::waitForFrameSync(int) () from /usr/lib/libQt5WaylandClient.so.5 #3 0x00007fd0e6922bcc in ?? () from /usr/lib/qt/plugins/wayland-graphics-integration-client/libqt-plugin-wayland-egl.so #4 0x00007fd0e593b0a2 in QOpenGLContext::swapBuffers(QSurface*) () from /usr/lib/libQt5Gui.so.5 #5 0x00007fd0e5c0b27b in QPlatformBackingStore::composeAndFlush(QWindow*, QRegion const&, QPoint const&, QPlatformTextureList*, bool) () from /usr/lib/libQt5Gui.so.5 #6 0x00007fd0e5f2673e in ?? () from /usr/lib/libQt5Widgets.so.5 #7 0x00007fd0e5f284a5 in ?? () from /usr/lib/libQt5Widgets.so.5 #8 0x00007fd0e5f29e62 in ?? () from /usr/lib/libQt5Widgets.so.5 #9 0x00007fd0e5f2a269 in ?? () from /usr/lib/libQt5Widgets.so.5 #10 0x00007fd0e5f42407 in QWidgetPrivate::syncBackingStore() () from /usr/lib/libQt5Widgets.so.5 #11 0x00007fd0e5f5b080 in QWidget::event(QEvent*) () from /usr/lib/libQt5Widgets.so.5 #12 0x00007fd0e60735e5 in QMainWindow::event(QEvent*) () from /usr/lib/libQt5Widgets.so.5 #13 0x00007fd0e4e21c2c in KMainWindow::event(QEvent*) () from /usr/lib/libKF5XmlGui.so.5 #14 0x00007fd0e4e6ded6 in KXmlGuiWindow::event(QEvent*) () from /usr/lib/libKF5XmlGui.so.5 #15 0x00007fd0e5f174d5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5 #16 0x00007fd0e5f20a21 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5 #17 0x00007fd0e55619c2 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5 #18 0x00007fd0e5f2ad2d in ?? () from /usr/lib/libQt5Widgets.so.5 #19 0x00007fd0e5f2d0db in ?? () from /usr/lib/libQt5Widgets.so.5 #20 0x00007fd0e5f442bf in QWidget::repaint(QRect const&) () from /usr/lib/libQt5Widgets.so.5 #21 0x00007fd0e5f4431d in QWidget::repaint() () from /usr/lib/libQt5Widgets.so.5 #22 0x00007fd0e5f7a343 in ?? () from /usr/lib/libQt5Widgets.so.5 #23 0x00007fd0e5f174d5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5 #24 0x00007fd0e5f20a21 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5 #25 0x00007fd0e55619c2 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5 #26 0x00007fd0e58ee1bd in QPlatformWindow::deliverUpdateRequest() () from /usr/lib/libQt5Gui.so.5 #27 0x00007fd0cdb8aacf in QtWaylandClient::QWaylandWindow::handleFrameCallback() () from /usr/lib/libQt5WaylandClient.so.5 #28 0x00007fd0ce0146d0 in ffi_call_unix64 () from /usr/lib/libffi.so.6 #29 0x00007fd0ce0140a0 in ffi_call () from /usr/lib/libffi.so.6 #30 0x00007fd0e693cf8f in ?? () from /usr/lib/libwayland-client.so.0 #31 0x00007fd0e69396ba in ?? () from /usr/lib/libwayland-client.so.0 #32 0x00007fd0e693abfc in wl_display_dispatch_queue_pending () from /usr/lib/libwayland-client.so.0 #33 0x00007fd0cdb840a7 in QtWaylandClient::QWaylandDisplay::dispatchQueueWhile(wl_event_queue*, std::function<bool ()>, int) () from /usr/lib/libQt5WaylandClient.so.5 #34 0x00007fd0cdb8abbd in QtWaylandClient::QWaylandWindow::waitForFrameSync(int) () from /usr/lib/libQt5WaylandClient.so.5 #35 0x00007fd0e6922bcc in ?? () from /usr/lib/qt/plugins/wayland-graphics-integration-client/libqt-plugin-wayland-egl.so --Type <RET> for more, q to quit, c to continue without paging-- #36 0x00007fd0e593b0a2 in QOpenGLContext::swapBuffers(QSurface*) () from /usr/lib/libQt5Gui.so.5 #37 0x00007fd0e5c0b27b in QPlatformBackingStore::composeAndFlush(QWindow*, QRegion const&, QPoint const&, QPlatformTextureList*, bool) () from /usr/lib/libQt5Gui.so.5 #38 0x00007fd0e5f2673e in ?? () from /usr/lib/libQt5Widgets.so.5 #39 0x00007fd0e5f284a5 in ?? () from /usr/lib/libQt5Widgets.so.5 #40 0x00007fd0e5f29e62 in ?? () from /usr/lib/libQt5Widgets.so.5 #41 0x00007fd0e5f2a269 in ?? () from /usr/lib/libQt5Widgets.so.5 #42 0x00007fd0e5f42407 in QWidgetPrivate::syncBackingStore() () from /usr/lib/libQt5Widgets.so.5 #43 0x00007fd0e5f5b080 in QWidget::event(QEvent*) () from /usr/lib/libQt5Widgets.so.5 #44 0x00007fd0e60735e5 in QMainWindow::event(QEvent*) () from /usr/lib/libQt5Widgets.so.5 #45 0x00007fd0e4e21c2c in KMainWindow::event(QEvent*) () from /usr/lib/libKF5XmlGui.so.5 #46 0x00007fd0e4e6ded6 in KXmlGuiWindow::event(QEvent*) () from /usr/lib/libKF5XmlGui.so.5 #47 0x00007fd0e5f174d5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5 #48 0x00007fd0e5f20a21 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5 #49 0x00007fd0e55619c2 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5 #50 0x00007fd0e5564739 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQt5Core.so.5 #51 0x00007fd0e55ba3a4 in ?? () from /usr/lib/libQt5Core.so.5 #52 0x00007fd0e1cf890f in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0 #53 0x00007fd0e1cfa869 in ?? () from /usr/lib/libglib-2.0.so.0 #54 0x00007fd0e1cfa8ae in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #55 0x00007fd0e55b99a3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #56 0x00007fd0e55605ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #57 0x00007fd0e5568326 in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5 #58 0x000055a1d0175077 in ?? () #59 0x00007fd0e4f4dee3 in __libc_start_main () from /usr/lib/libc.so.6 #60 0x000055a1d017523e in ?? () Actually, it doesn't seem like KMail's fault, but I cannot find other apps having the same issue.
*** Bug 409796 has been marked as a duplicate of this bug. ***
Same thing here. kmail-19.04.2-2.fc30.x86_64 KDE Frameworks Version: 5.59.0 Qt Version: 5.14.4 gdb: Thread 1 (Thread 0x7f736b23c040 (LWP 4565)): #0 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 #1 0x00007f737e1cea25 in QtLinuxFutex::_q_futex (val3=0, addr2=0x0, val2=0, val=3, op=0, addr=0x7f735e25c2b0 <QtWaylandClient::QWaylandWindow::mFrameSyncMutex>) at thread/qfutex_p.h:105 #2 QtLinuxFutex::futexWait<QBasicAtomicPointer<QMutexData> > (expectedValue=0x3, futex=...) at thread/qfutex_p.h:107 #3 lockInternal_helper<false> (timeout=-1, elapsedTimer=0x0, d_ptr=...) at thread/qmutex_linux.cpp:142 #4 QBasicMutex::lockInternal (this=this@entry=0x7f735e25c2b0 <QtWaylandClient::QWaylandWindow::mFrameSyncMutex>) at thread/qmutex_linux.cpp:159 #5 0x00007f737e1cea88 in QMutex::lock (this=this@entry=0x7f735e25c2b0 <QtWaylandClient::QWaylandWindow::mFrameSyncMutex>) at thread/qmutex.cpp:227 #6 0x00007f735e1bfced in QMutexLocker::QMutexLocker (m=0x7f735e25c2b0 <QtWaylandClient::QWaylandWindow::mFrameSyncMutex>, this=<synthetic pointer>) at /usr/include/qt5/QtCore/qmutex.h:206 #7 QtWaylandClient::QWaylandWindow::waitForFrameSync (this=0x55bd7911f010, timeout=100) at qwaylandwindow.cpp:664 #8 0x00007f735de1c022 in QtWaylandClient::QWaylandGLContext::swapBuffers (this=0x55bd7c4debd0, surface=<optimized out>) at ../../../../hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp:566 #9 0x00007f737e780881 in QOpenGLContext::swapBuffers (this=0x55bd7c4da960, surface=surface@entry=0x55bd783b9970) at kernel/qopenglcontext.cpp:1115 #10 0x00007f737e9d65cf in QPlatformBackingStore::composeAndFlush (this=this@entry=0x55bd795004b0, window=0x55bd783b9960, region=..., offset=..., textures=textures@entry=0x7f737f2061e0 <(anonymous namespace)::Q_QGS_qt_dummy_platformTextureList::innerFunction()::holder>, translucentBackground=translucentBackground@entry=false) at painting/qplatformbackingstore.cpp:463 #11 0x00007f737ece5c06 in QWidgetBackingStore::qt_flush (widgetBackingStore=<optimized out>, widgetTextures=0x7f737f2061e0 <(anonymous namespace)::Q_QGS_qt_dummy_platformTextureList::innerFunction()::holder>, tlw=<optimized out>, backingStore=<optimized out>, region=..., widget=0x55bd7954e720) at kernel/qwidgetbackingstore.cpp:154 #12 QWidgetBackingStore::qt_flush (widget=0x55bd7954e720, region=..., backingStore=<optimized out>, tlw=<optimized out>, widgetTextures=<optimized out>, widgetBackingStore=<optimized out>) at kernel/qwidgetbackingstore.cpp:83 #13 0x00007f737ece7618 in QWidgetBackingStore::flush (this=this@entry=0x55bd783ba230, widget=widget@entry=0x0) at kernel/qwidgetbackingstore.cpp:1442 #14 0x00007f737ece8c40 in QWidgetBackingStore::endPaint (beginPaintInfo=<synthetic pointer>, backingStore=<optimized out>, cleaned=..., this=0x55bd783ba230) at kernel/qwidgetbackingstore.cpp:363 #15 QWidgetBackingStore::doSync (this=<optimized out>) at kernel/qwidgetbackingstore.cpp:1426 #16 0x00007f737ece8fc1 in QWidgetBackingStore::sync (this=0x55bd783ba230) at kernel/qwidgetbackingstore.cpp:1204 #17 0x00007f737ed01065 in QWidgetPrivate::syncBackingStore (this=0x55bd78df3130) at kernel/qwidget.cpp:1961 #18 0x00007f737ed19bc8 in QWidget::event (this=this@entry=0x55bd7954e720, event=event@entry=0x7ffe0a2de4b0) at kernel/qwidget.cpp:9264 #19 0x00007f737ee2d908 in QMainWindow::event (this=this@entry=0x55bd7954e720, event=event@entry=0x7ffe0a2de4b0) at widgets/qmainwindow.cpp:1339 #20 0x00007f737dc45e0b in KMainWindow::event (this=this@entry=0x55bd7954e720, ev=ev@entry=0x7ffe0a2de4b0) at /usr/src/debug/kf5-kxmlgui-5.59.0-2.fc30.x86_64/src/kmainwindow.cpp:877 #21 0x00007f737dc928fb in KXmlGuiWindow::event (this=0x55bd7954e720, ev=0x7ffe0a2de4b0) at /usr/src/debug/kf5-kxmlgui-5.59.0-2.fc30.x86_64/src/kxmlguiwindow.cpp:125 #22 0x00007f737ecd6af6 in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x55bd7954e720, e=0x7ffe0a2de4b0) at kernel/qapplication.cpp:3737 #23 0x00007f737ecdfe80 in QApplication::notify(QObject*, QEvent*) () at kernel/qapplication.cpp:3483 #24 0x00007f737e375ae8 in QCoreApplication::notifyInternal2 (receiver=0x55bd7954e720, event=0x7ffe0a2de4b0) at kernel/qcoreapplication.cpp:1084 #25 0x00007f737ece9be3 in QWidgetBackingStore::sendUpdateRequest (this=this@entry=0x55bd783ba230, widget=0x55bd7954e720, updateTime=updateTime@entry=QWidgetBackingStore::UpdateNow) at kernel/qwidgetbackingstore.cpp:504 #26 0x00007f737ecea91e in QWidgetBackingStore::sendUpdateRequest (updateTime=QWidgetBackingStore::UpdateNow, widget=<optimized out>, this=0x55bd783ba230) at kernel/qwidgetbackingstore.cpp:474 #27 QWidgetBackingStore::markDirty (this=0x55bd783ba230, rect=..., widget=widget@entry=0x55bd7954e720, updateTime=updateTime@entry=QWidgetBackingStore::UpdateNow, bufferState=bufferState@entry=QWidgetBackingStore::BufferValid) at kernel/qwidgetbackingstore.cpp:678 #28 0x00007f737ed02f31 in QWidgetPrivate::repaint<QRect> (r=..., this=<optimized out>) at ../../include/QtWidgets/5.12.4/QtWidgets/private/../../../../../src/widgets/kernel/qwidget_p.h:139 #29 QWidget::repaint (this=<optimized out>, rect=...) at kernel/qwidget.cpp:11072 #30 0x00007f737ed02fa0 in QWidget::repaint (this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qrect.h:184 #31 0x00007f737ed37f34 in QWidgetWindow::event (event=0x7ffe0a2de920, this=0x55bd783b9960) at /usr/include/c++/9/bits/atomic_base.h:413 #32 QWidgetWindow::event (this=0x55bd783b9960, event=0x7ffe0a2de920) at kernel/qwidgetwindow.cpp:224 #33 0x00007f737ecd6af6 in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x55bd783b9960, e=0x7ffe0a2de920) at kernel/qapplication.cpp:3737 #34 0x00007f737ecdfe80 in QApplication::notify(QObject*, QEvent*) () at kernel/qapplication.cpp:3483 #35 0x00007f737e375ae8 in QCoreApplication::notifyInternal2 (receiver=0x55bd783b9960, event=0x7ffe0a2de920) at kernel/qcoreapplication.cpp:1084 #36 0x00007f737e73906d in QPlatformWindow::deliverUpdateRequest (this=<optimized out>) at kernel/qplatformwindow.cpp:793 #37 0x00007f735e1bfc7e in QtWaylandClient::QWaylandWindow::<lambda()>::operator() (__closure=<optimized out>, __closure=<optimized out>) at qwaylandwindow.cpp:650 #38 QtWaylandClient::QWaylandWindow::<lambda()>::operator() (__closure=<synthetic pointer>, __closure=<synthetic pointer>) at qwaylandwindow.cpp:641 #39 QtWaylandClient::QWaylandWindow::handleFrameCallback (this=0x55bd7911f010) at qwaylandwindow.cpp:656 #40 0x00007f736b8f3b28 in ffi_call_unix64 () at ../src/x86/unix64.S:76 #41 0x00007f736b8f3339 in ffi_call (cif=cif@entry=0x7ffe0a2dead0, fn=<optimized out>, rvalue=<optimized out>, rvalue@entry=0x0, avalue=avalue@entry=0x7ffe0a2deba0) at ../src/x86/ffi64.c:525 #42 0x00007f737f708607 in wl_closure_invoke (closure=closure@entry=0x55bd7dae1fb0, flags=flags@entry=1, target=<optimized out>, target@entry=0x55bd7da9f0e0, opcode=opcode@entry=0, data=<optimized out>) at src/connection.c:1014 #43 0x00007f737f704f18 in dispatch_event (display=display@entry=0x55bd77f38850, queue=<optimized out>) at src/wayland-client.c:1430 #44 0x00007f737f70646c in dispatch_queue (queue=0x55bd783b9710, display=0x55bd77f38850) at src/wayland-client.c:1576 #45 wl_display_dispatch_queue_pending (display=0x55bd77f38850, queue=queue@entry=0x55bd783b9710) at src/wayland-client.c:1818 #46 0x00007f735e1bb5b8 in QtWaylandClient::QWaylandDisplay::dispatchQueueWhile(wl_event_queue*, std::function<bool ()>, int) (this=0x55bd77ef6000, queue=0x55bd783b9710, condition=..., timeout=timeout@entry=100) at qwaylanddisplay.cpp:234 #47 0x00007f735e1bfd73 in QtWaylandClient::QWaylandWindow::waitForFrameSync (this=0x55bd7911f010, timeout=100) at /usr/include/c++/9/new:174 #48 0x00007f735de1c022 in QtWaylandClient::QWaylandGLContext::swapBuffers (this=0x55bd7c4debd0, surface=<optimized out>) at ../../../../hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp:566 #49 0x00007f737e780881 in QOpenGLContext::swapBuffers (this=0x55bd7c4da960, surface=surface@entry=0x55bd783b9970) at kernel/qopenglcontext.cpp:1115 #50 0x00007f737e9d65cf in QPlatformBackingStore::composeAndFlush (this=this@entry=0x55bd795004b0, window=0x55bd783b9960, region=..., offset=..., textures=textures@entry=0x7f737f2061e0 <(anonymous namespace)::Q_QGS_qt_dummy_platformTextureList::innerFunction()::holder>, translucentBackground=translucentBackground@entry=false) at painting/qplatformbackingstore.cpp:463 #51 0x00007f737ece5c06 in QWidgetBackingStore::qt_flush (widgetBackingStore=<optimized out>, widgetTextures=0x7f737f2061e0 <(anonymous namespace)::Q_QGS_qt_dummy_platformTextureList::innerFunction()::holder>, tlw=<optimized out>, backingStore=<optimized out>, region=..., widget=0x55bd7954e720) at kernel/qwidgetbackingstore.cpp:154 #52 QWidgetBackingStore::qt_flush (widget=0x55bd7954e720, region=..., backingStore=<optimized out>, tlw=<optimized out>, widgetTextures=<optimized out>, widgetBackingStore=<optimized out>) at kernel/qwidgetbackingstore.cpp:83 #53 0x00007f737ece7618 in QWidgetBackingStore::flush (this=this@entry=0x55bd783ba230, widget=widget@entry=0x0) at kernel/qwidgetbackingstore.cpp:1442 #54 0x00007f737ece8c40 in QWidgetBackingStore::endPaint (beginPaintInfo=<synthetic pointer>, backingStore=<optimized out>, cleaned=..., this=0x55bd783ba230) at kernel/qwidgetbackingstore.cpp:363 #55 QWidgetBackingStore::doSync (this=<optimized out>) at kernel/qwidgetbackingstore.cpp:1426 #56 0x00007f737ece8e75 in QWidgetBackingStore::sync (this=0x55bd783ba230, exposedWidget=0x55bd7954e720, exposedRegion=...) at kernel/qwidgetbackingstore.cpp:1178 #57 0x00007f737ed010db in QWidgetPrivate::syncBackingStore (this=this@entry=0x55bd78df3130, region=...) at ../../include/QtWidgets/5.12.4/QtWidgets/private/../../../../../src/widgets/kernel/qwidget_p.h:304 #58 0x00007f737ed3743c in QWidgetWindow::handleExposeEvent (this=<optimized out>, event=0x7ffe0a2df860) at ../../include/QtGui/../../src/gui/kernel/qevent.h:442 #59 0x00007f737ed37e30 in QWidgetWindow::event (event=0x7ffe0a2df860, this=0x55bd783b9960) at kernel/qwidgetwindow.cpp:328 #60 QWidgetWindow::event (this=0x55bd783b9960, event=0x7ffe0a2df860) at kernel/qwidgetwindow.cpp:224 #61 0x00007f737ecd6af6 in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x55bd783b9960, e=0x7ffe0a2df860) at kernel/qapplication.cpp:3737 #62 0x00007f737ecdfe80 in QApplication::notify(QObject*, QEvent*) () at kernel/qapplication.cpp:3483 #63 0x00007f737e375ae8 in QCoreApplication::notifyInternal2 (receiver=0x55bd783b9960, event=0x7ffe0a2df860) at kernel/qcoreapplication.cpp:1084 #64 0x00007f737e748c76 in QGuiApplicationPrivate::processExposeEvent (e=0x55bd7c4dd4e0) at kernel/qguiapplication.cpp:3071 #65 0x00007f737e748eb4 in QGuiApplicationPrivate::processWindowSystemEvent (e=0x55bd7c4dd4e0) at kernel/qguiapplication.cpp:1907 #66 0x00007f737e7254fb in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1151 #67 0x00007f737e725668 in QWindowSystemInterface::flushWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1115 #68 0x00007f735e1bfb09 in QtWaylandClient::QWaylandWindow::applyConfigure (this=0x55bd788c5770) at /usr/include/qt5/QtCore/qflags.h:120 #69 0x00007f737e3a0bfa in QObject::event (this=0x55bd788c5770, e=<optimized out>) at kernel/qobject.cpp:1260 #70 0x00007f737ecd6af6 in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x55bd788c5770, e=0x55bd7954dfc0) at kernel/qapplication.cpp:3737 #71 0x00007f737ecdfe80 in QApplication::notify(QObject*, QEvent*) () at kernel/qapplication.cpp:3483 #72 0x00007f737e375ae8 in QCoreApplication::notifyInternal2 (receiver=0x55bd788c5770, event=0x55bd7954dfc0) at kernel/qcoreapplication.cpp:1084 #73 0x00007f737e378a93 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x55bd77f2a910) at kernel/qcoreapplication.cpp:1821 #74 0x00007f737e3cae47 in postEventSourceDispatch (s=s@entry=0x55bd77fb4ec0) at kernel/qeventdispatcher_glib.cpp:276 #75 0x00007f737ac4eedd in g_main_dispatch (context=0x55bd77f8cb40) at ../glib/gmain.c:3189 #76 g_main_context_dispatch (context=context@entry=0x55bd77f8cb40) at ../glib/gmain.c:3854 #77 0x00007f737ac4f270 in g_main_context_iterate (context=context@entry=0x55bd77f8cb40, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:3927 #78 0x00007f737ac4f313 in g_main_context_iteration (context=0x55bd77f8cb40, may_block=may_block@entry=1) at ../glib/gmain.c:3988 #79 0x00007f737e3cabd5 in QEventDispatcherGlib::processEvents (this=0x55bd77f88db0, flags=...) at kernel/qeventdispatcher_glib.cpp:422 #80 0x00007f737e3749eb in QEventLoop::exec (this=this@entry=0x7ffe0a2dff70, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140 #81 0x00007f737e37c726 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:120 #82 0x000055bd7778584b in main (argc=<optimized out>, argv=<optimized out>) at /usr/include/qt5/QtCore/qcoreapplication.h:116 helgrind says on exit: ==3256== Thread #1: Exiting thread still holds 1 lock ==3256== at 0x6146FAD: syscall (syscall.S:38) ==3256== by 0x59F7A24: _q_futex (qfutex_p.h:92) ==3256== by 0x59F7A24: futexWait<QBasicAtomicPointer<QMutexData> > (qfutex_p.h:107) ==3256== by 0x59F7A24: lockInternal_helper<false> (qmutex_linux.cpp:142) ==3256== by 0x59F7A24: QBasicMutex::lockInternal() (qmutex_linux.cpp:159) ==3256== by 0x483ED5B: QMutex_lock_WRK (hg_intercepts.c:3041) ==3256== by 0x48413AE: QMutex::lock() (hg_intercepts.c:3055) ==3256== by 0x26167CEC: UnknownInlinedFun (qmutex.h:206) ==3256== by 0x26167CEC: QtWaylandClient::QWaylandWindow::waitForFrameSync(int) (qwaylandwindow.cpp:664) ==3256== by 0x260EB021: QtWaylandClient::QWaylandGLContext::swapBuffers(QPlatformSurface*) (qwaylandglcontext.cpp:566) ==3256== by 0x5553880: QOpenGLContext::swapBuffers(QSurface*) (qopenglcontext.cpp:1115) ==3256== by 0x57A95CE: QPlatformBackingStore::composeAndFlush(QWindow*, QRegion const&, QPoint const&, QPlatformTextureList*, bool) (qplatformbackingstore.cpp:463) ==3256== by 0x4EE0C05: qt_flush (qwidgetbackingstore.cpp:154) ==3256== by 0x4EE0C05: QWidgetBackingStore::qt_flush(QWidget*, QRegion const&, QBackingStore*, QWidget*, QPlatformTextureList*, QWidgetBackingStore*) (qwidgetbackingstore.cpp:83) ==3256== by 0x4EE2617: QWidgetBackingStore::flush(QWidget*) (qwidgetbackingstore.cpp:1442) ==3256== by 0x4EE3C3F: endPaint (qwidgetbackingstore.cpp:363) ==3256== by 0x4EE3C3F: QWidgetBackingStore::doSync() (qwidgetbackingstore.cpp:1426) ==3256== by 0x4EE3FC0: QWidgetBackingStore::sync() (qwidgetbackingstore.cpp:1204)
kmail is still freezing on Wayland. Operating System: KDE neon Unstable Edition KDE Plasma Version: 5.19.80 KDE Frameworks Version: 5.71.0 Qt Version: 5.14.2