Version: unknown (using 4.00.83 (KDE 4.0.83 (KDE 4.1 Beta2), compiled sources) Compiler: gcc-4.3 OS: Linux (i686) release 2.6.25-2-486 It will be long and as detailed as possible :-) (there are possibly several bugs embedded) kdebase svn revision 824012 Testcase : 1/ put yourself in conditions : kquitapp plasma && killall plasma (that's important for the demo) move the config files elsewhere 2/ start plasma from a console, I get the content of file #1 (Alexis is aware of the device notifier errors) 3/ Add the trash widget to the desktop 4/ Now, drag this widget from the desktop to the panel. You get this (at least, here) : plasma(6575)/libplasma Plasma::AppletHandle::mouseMoveEvent: screenRect = QRect(20,1188 86x78) plasma(6575)/libplasma Plasma::AppletHandle::switchContainment: panel Plasma crashed, attempting to automatically recover KCrash: crashing... crashRecursionCounter = 2 KCrash: Application Name = plasma path = <unknown> pid = 6575 sock_file=/home/krop/.kde/socket-mokona/kdeinit4__0 <unknown program name>(6676)/ checkComposite: Plasma has an argb visual 0x9c10400 33554433 <unknown program name>(6676)/ checkComposite: Plasma is COMPOSITE-less on 0x9c08f00 plasma(6678) PlasmaApp::PlasmaApp: Setting the pixmap cache size to 9064 kilobytes plasma(6678)/libplasma Plasma::Corona::Private::addContainment: loading of containment "" failed. plasma(6678)/kdecore (KSycoca) KSycocaPrivate::openDatabase: Trying to open ksycoca from "/var/tmp/kdecache-krop/ksycoca4" findServiceByDesktopPath: not found plasma(6678)/libplasma Plasma::Applet::Private::init: Check your constructor! You probably want to be passing in a Service::Ptr or a QVariantList with a valid storageid as arg[0]. plasma(6678) PlasmaApp::createView: Containment name: "Unknown Applet" | type 127 | screen: -1 | geometry: QRectF(0,0 0x0) | zValue: 0 plasma(6678) DefaultDesktop::reloadConfig: Using configured wallpaper "/opt/kde4/share/wallpapers/Blue_Curl/contents/images/1920x1200.jpg" plasma(6678) PlasmaApp::createView: Containment name: "Desktop" | type 0 | screen: -1 | geometry: QRectF(0,0 22x23) | zValue: 0 Which means plasma was restarted *just* after the crash (the drKonqi window is still opened) There's indeed two plasma processes running. The crashed one and a plasma --nocrashhandler that already started (at least, tried) So let's see the backtrace for the crashed plasma : (gdb) bt #0 0xb7ee9430 in __kernel_vsyscall () #1 0xb5b18dc6 in nanosleep () from /lib/i686/cmov/libc.so.6 #2 0xb5b18bdf in sleep () from /lib/i686/cmov/libc.so.6 #3 0xb7980c74 in KCrash::startDrKonqi (argv=0xbfa02f9c, argc=17) at /media/kde/src/KDE/kdelibs/kdeui/util/kcrash.cpp:361 #4 0xb7981204 in KCrash::defaultCrashHandler (sig=11) at /media/kde/src/KDE/kdelibs/kdeui/util/kcrash.cpp:286 #5 <signal handler called> #6 0xb64b30ec in QGraphicsScenePrivate::filterEvent (this=0x8cf79c0, item=0x945c070, event=0xbfa03388) at graphicsview/qgraphicsscene.cpp:1026 #7 0xb64b3171 in QGraphicsScenePrivate::sendEvent (this=0x8cf79c0, item=0x945c070, event=0xbfa03388) at graphicsview/qgraphicsscene.cpp:1044 #8 0xb64b63e2 in QGraphicsScenePrivate::sendHoverEvent (this=0x8cf79c0, type=QEvent::GraphicsSceneHoverLeave, item=0x945c070, hoverEvent=0xbfa034d0) at graphicsview/qgraphicsscene.cpp:1093 #9 0xb64bcd86 in QGraphicsScenePrivate::dispatchHoverEvent (this=0x8cf79c0, hoverEvent=0xbfa034d0) at graphicsview/qgraphicsscene.cpp:3402 #10 0xb64bfb3f in QGraphicsScene::mouseMoveEvent (this=0x8cf6ec8, mouseEvent=0xbfa039a0) at graphicsview/qgraphicsscene.cpp:3566 #11 0xb64bd06c in QGraphicsScene::event (this=0x8cf6ec8, event=0xbfa039a0) at graphicsview/qgraphicsscene.cpp:2984 #12 0xb5f00269 in QApplicationPrivate::notify_helper (this=0x8c2d150, receiver=0x8cf6ec8, e=0xbfa039a0) at kernel/qapplication.cpp:3772 #13 0xb5f0057e in QApplication::notify (this=0x8c0f198, receiver=0x8cf6ec8, e=0xbfa039a0) at kernel/qapplication.cpp:3366 #14 0xb7920701 in KApplication::notify (this=0x8c0f198, receiver=0x8cf6ec8, event=0xbfa039a0) at /media/kde/src/KDE/kdelibs/kdeui/kernel/kapplication.cpp:311 #15 0xb6ae426b in QCoreApplication::notifyInternal (this=0x8c0f198, receiver=0x8cf6ec8, event=0xbfa039a0) at kernel/qcoreapplication.cpp:583 #16 0xb70146eb in QCoreApplication::sendEvent (receiver=0x8cf6ec8, event=0xbfa039a0) at ../../../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215 #17 0xb64d1b04 in QGraphicsView::mouseMoveEvent (this=0x8e4a200, event=0xbfa041b4) at graphicsview/qgraphicsview.cpp:2702 #18 0xb5f5c388 in QWidget::event (this=0x8e4a200, event=0xbfa041b4) at kernel/qwidget.cpp:6912 #19 0xb62bf91a in QFrame::event (this=0x8e4a200, e=0xbfa041b4) at widgets/qframe.cpp:657 #20 0xb635552d in QAbstractScrollArea::viewportEvent (this=0x8e4a200, e=0xbfa041b4) at widgets/qabstractscrollarea.cpp:941 #21 0xb64cb9e5 in QGraphicsView::viewportEvent (this=0x8e4a200, event=0xbfa041b4) at graphicsview/qgraphicsview.cpp:2267 #22 0xb6358042 in QAbstractScrollAreaPrivate::viewportEvent (this=0x8e958e0, event=0xbfa041b4) at widgets/qabstractscrollarea_p.h:102 #23 0xb6358070 in QAbstractScrollAreaFilter::eventFilter (this=0x8f4c4b0, o=0x8f4bcb0, e=0xbfa041b4) at widgets/qabstractscrollarea_p.h:113 #24 0xb6ae263c in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x8c2d150, receiver=0x8f4bcb0, event=0xbfa041b4) at kernel/qcoreapplication.cpp:694 #25 0xb5f00246 in QApplicationPrivate::notify_helper (this=0x8c2d150, receiver=0x8f4bcb0, e=0xbfa041b4) at kernel/qapplication.cpp:3768 #26 0xb5f00de7 in QApplication::notify (this=0x8c0f198, receiver=0x8f4bcb0, e=0xbfa041b4) at kernel/qapplication.cpp:3501 #27 0xb7920701 in KApplication::notify (this=0x8c0f198, receiver=0x8f4bcb0, event=0xbfa041b4) at /media/kde/src/KDE/kdelibs/kdeui/kernel/kapplication.cpp:311 #28 0xb6ae426b in QCoreApplication::notifyInternal (this=0x8c0f198, receiver=0x8f4bcb0, event=0xbfa041b4) at kernel/qcoreapplication.cpp:583 #29 0xb5f0c0a3 in QCoreApplication::sendSpontaneousEvent (receiver=0x8f4bcb0, event=0xbfa041b4) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218 #30 0xb5f04bb0 in QApplicationPrivate::sendMouseEvent (receiver=0x8f4bcb0, event=0xbfa041b4, alienWidget=0x8f4bcb0, nativeWidget=0x8e4a200, buttonDown=0xb65f5c20, lastMouseReceiver=@0xb65f5c24) at kernel/qapplication.cpp:2766 #31 0xb5f7a7d2 in QETWidget::translateMouseEvent (this=0x8e4a200, event=0xbfa046a0) at kernel/qapplication_x11.cpp:4133 #32 0xb5f7b4f7 in QApplication::x11ProcessEvent (this=0x8c0f198, event=0xbfa046a0) at kernel/qapplication_x11.cpp:3133 #33 0xb5fa48de in x11EventSourceDispatch (s=0x8c2ff60, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:148 #34 0xb5802978 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0 #35 0xb5805bce in ?? () from /usr/lib/libglib-2.0.so.0 #36 0x08c2f260 in ?? () #37 0x00000000 in ?? () ( gdb) thread 2 [Switching to thread 2 (Thread 0xb1ca5b90 (LWP 6577))]#0 0xb7ee9430 in __kernel_vsyscall () (gdb) bt #0 0xb7ee9430 in __kernel_vsyscall () #1 0xb698d015 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/cmov/libpthread.so.0 #2 0xb69f5d48 in QWaitConditionPrivate::wait (this=0x8f7f3b8, time=4294967295) at thread/qwaitcondition_unix.cpp:88 #3 0xb69f5847 in QWaitCondition::wait (this=0x8dd4018, mutex=0x8dd4014, time=4294967295) at thread/qwaitcondition_unix.cpp:265 #4 0xb6789993 in QHostInfoAgent::run (this=0x8dd4008) at kernel/qhostinfo.cpp:247 #5 0xb69f5423 in QThreadPrivate::start (arg=0x8dd4008) at thread/qthread_unix.cpp:190 #6 0xb69894b0 in start_thread () from /lib/i686/cmov/libpthread.so.0 #7 0xb5b5d38e in clone () from /lib/i686/cmov/libc.so.6 ( gdb) thread 3 [Switching to thread 3 (Thread 0xb2c93b90 (LWP 6576))]#0 0xb7ee9430 in __kernel_vsyscall () (gdb) bt #0 0xb7ee9430 in __kernel_vsyscall () #1 0xb698d015 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/cmov/libpthread.so.0 #2 0xb69f5d48 in QWaitConditionPrivate::wait (this=0x8d85830, time=4294967295) at thread/qwaitcondition_unix.cpp:88 #3 0xb69f5847 in QWaitCondition::wait (this=0x8d3418c, mutex=0x8d34188, time=4294967295) at thread/qwaitcondition_unix.cpp:265 #4 0xb3033a4a in RenderThread::run (this=0x8d34180) at /media/kde/src/KDE/kdebase/workspace/plasma/containments/desktop/renderthread.cpp:84 #5 0xb69f5423 in QThreadPrivate::start (arg=0x8d34180) at thread/qthread_unix.cpp:190 #6 0xb69894b0 in start_thread () from /lib/i686/cmov/libpthread.so.0 #7 0xb5b5d38e in clone () from /lib/i686/cmov/libc.so.6 (gdb) quit -- Problem then : if plasma restarted, why didn't my desktop and panel came back. Attaching gdb to the remaining plasma process show it crashed (the backtrace is almost useless it seems) gdb) bt #0 0xb7fe1430 in __kernel_vsyscall () #1 0xb5c4ab27 in poll () from /lib/i686/cmov/libc.so.6 #2 0xb58fdbef in ?? () from /usr/lib/libglib-2.0.so.0 #3 0x09c2eda8 in ?? () #4 0x00000004 in ?? () #5 0xffffffff in ?? () #6 0x09c2eda8 in ?? () #7 0x00000004 in ?? () #8 0xb59725f8 in ?? () from /usr/lib/libglib-2.0.so.0 #9 0xb5972620 in ?? () from /usr/lib/libglib-2.0.so.0 #10 0xbfafa8e4 in ?? () #11 0x00000001 in ?? () #12 0x00000001 in ?? () #13 0x09c32438 in ?? () #14 0x09c2eda8 in ?? () #15 0xb5c4aab0 in ?? () from /lib/i686/cmov/libc.so.6 #16 0xb6a843e0 in ?? () from /lib/i686/cmov/libpthread.so.0 #17 0xb6a82970 in ?? () from /lib/i686/cmov/libpthread.so.0 #18 0xb5921f92 in g_thread_self () from /usr/lib/libglib-2.0.so.0 #19 0xb58fe11c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #20 0xb6c09eb6 in QEventDispatcherGlib::processEvents (this=0x9c121c8, flags={i = -1079006872}) at kernel/qeventdispatcher_glib.cpp:325 #21 0xb609c0f8 in QGuiEventDispatcherGlib::processEvents (this=0x9c121c8, flags={i = -1079006824}) at kernel/qguieventdispatcher_glib.cpp:204 #22 0xb6bd928c in QEventLoop::processEvents (this=0xbfafaa10, flags={i = -1079006764}) at kernel/qeventloop.cpp:149 #23 0xb6bd94c9 in QEventLoop::exec (this=0xbfafaa10, flags={i = -1079006696}) at kernel/qeventloop.cpp:196 #24 0xb6bdca67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:845 #25 0xb5ff7f82 in QApplication::exec () at kernel/qapplication.cpp:3304 #26 0xb7fc87e6 in kdemain (argc=2, argv=0xbfafac04) at /media/kde/src/KDE/kdebase/workspace/plasma/plasma/main.cpp:54 #27 0x08048812 in main (argc=Cannot access memory at address 0x4) at /media/kde/build/KDE/kdebase/workspace/plasma/plasma/plasma-qgv_dummy.cpp:3 (gdb) kill Kill the program being debugged? (y or n) y (gdb) quit -- Last problem then. Killing this unexpected process won't make plasma work again : plasma <unknown program name>(6735)/ checkComposite: Plasma has an argb visual 0x8bc8408 10485761 <unknown program name>(6735)/ checkComposite: Plasma is COMPOSITE-less on 0x8bc0f08 plasma(6736) PlasmaApp::PlasmaApp: Setting the pixmap cache size to 9064 kilobytes plasma(6736)/libplasma Plasma::Corona::Private::addContainment: loading of containment "" failed. plasma(6736)/kdecore (KSycoca) KSycocaPrivate::openDatabase: Trying to open ksycoca from "/var/tmp/kdecache-krop/ksycoca4" findServiceByDesktopPath: not found plasma(6736)/libplasma Plasma::Applet::Private::init: Check your constructor! You probably want to be passing in a Service::Ptr or a QVariantList with a valid storageid as arg[0]. plasma(6736)/libplasma Plasma::Corona::Private::addContainment: loading of containment "" failed. findServiceByDesktopPath: not found plasma(6736)/libplasma Plasma::Applet::Private::init: Check your constructor! You probably want to be passing in a Service::Ptr or a QVariantList with a valid storageid as arg[0]. plasma(6736) PlasmaApp::createView: Containment name: "Unknown Applet" | type 127 | screen: -1 | geometry: QRectF(0,0 0x0) | zValue: 0 plasma(6736) PlasmaApp::createView: Containment name: "Unknown Applet" | type 127 | screen: -1 | geometry: QRectF(0,0 0x0) | zValue: 0 plasma(6736) DefaultDesktop::reloadConfig: Using configured wallpaper "/opt/kde4/share/wallpapers/Blue_Curl/contents/images/1920x1200.jpg" plasma(6736) PlasmaApp::createView: Containment name: "Desktop" | type 0 | screen: -1 | geometry: QRectF(0,0 22x23) | zValue: 0 and that's all. There's a new plasma process but still no desktop. For plasma to restart, I have to remove plasma-appletsrc then restart it (don't know if this detail may be important, but no plasmarc was created)
Almost forgot the last detail :) After finally being able to restart plasma, the systray icons won't move from the top left corner.
Created attachment 25571 [details] file #1 Will be even better if I don't forget to attach files.
works perfectly here, duplicating your steps exactly as laid out here.
Thank you. I'm currently recompiling qt-copy and the main kde modules to check again.
Ok so, after recompiling, I'm still able to reproduce this. the .xsession-errors part before this crash : plasma(21064)/libplasma Plasma::AppletHandle::switchContainment: panel Plasma crashed, attempting to automatically recover QObject: Do not delete object, 'unnamed', during its event handler! KCrash: crashing... crashRecursionCounter = 2 KCrash: Application Name = <unknown> path = <unknown> pid = 21064 -- Still trying to find a reason :)
"QObject: Do not delete object, 'unnamed', during its event handler!" that looks suspicious and un-good. can you get a backtrace for me, please?
I'm trying to gather useful informations but it leads to nothing for the moment... Except my testcase is partially false : Due to the latency brought by Valgrind, I realized that it's not dragging the trash from the desktop containment to the panel that makes plasma crash but mouseHovering the widget after it was dragged. To be totally sure it wasn't a local problem, this time, I deleted both my qt and kde installation and build files and recompiled everything. I'm still able to reproduce the crash : (I cleaned up the gdb output) krop@mokona:~$ gdb --args plasma --nofork ==> Browsing the widgets plasma(20201)/libplasma KCategorizedItemsViewFilterDelegate::KCategorizedItemsViewFilterDelegate: KCategorizedItemsViewFilterDelegate(QObject *parent) plasma(20201)/libplasma Plasma::AppletBrowserWidget::setApplication: QHash(("Folder View", 1)("Task Manager", 1)("System Tray", 1)("Digital Clock", 1)("New Device Notifier", 1)("Pager", 1)("Application Launcher", 1)) plasma(20201)/kdeui (KIconLoader) KIconLoader::loadIcon: No such icon "world" plasma(20201) HddTemp::updateData: "Connection refused" ==> Adding the trash widget plasma(20201)/libplasma PlasmaAppletItemModel::mimeData: GETTING MIME DATA QGraphicsItem::installSceneEventFilter: event filters can only be installed on items in a scene. => Dragging plasma(20201)/libplasma Plasma::Applet::screenRect: screenRect = QPoint(1240,909) plasma(20201)/libplasma Plasma::AppletHandle::mouseMoveEvent: screenRect = QRect(1262,1170 86x78) plasma(20201)/libplasma Plasma::View::Private::updateSceneRect: !!!!!!!!!!!!!!!!! setting the scene rect to QRectF(0,0 1600x1200) associated screen is 0 plasma(20201)/libplasma Plasma::Applet::screenRect: screenRect = QPoint(1240,909) [cut] plasma(20201)/libplasma Plasma::AppletHandle::mouseMoveEvent: screenRect = QRect(1262,1185 86x78) plasma(20201)/libplasma Plasma::AppletHandle::switchContainment: panel Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0xb49e3740 (LWP 20201)] 0xb657b208 in QGraphicsScenePrivate::filterEvent (this=0x82b7308, item=0x8992008, event=0xbfacaca8) at graphicsview/qgraphicsscene.cpp:1026 1026 if (it.value()->sceneEventFilter(it.key(), event)) (gdb) bt #0 0xb657b208 in QGraphicsScenePrivate::filterEvent (this=0x82b7308, item=0x8992008, event=0xbfacaca8) at graphicsview/qgraphicsscene.cpp:1026 #1 0xb657b28d in QGraphicsScenePrivate::sendEvent (this=0x82b7308, item=0x8992008, event=0xbfacaca8) at graphicsview/qgraphicsscene.cpp:1044 #2 0xb657e4fe in QGraphicsScenePrivate::sendHoverEvent (this=0x82b7308, type=QEvent::GraphicsSceneHoverEnter, item=0x8992008, hoverEvent=0xbfacadf0) at graphicsview/qgraphicsscene.cpp:1093 + regular backtrace The only new element is : 1026 if (it.value()->sceneEventFilter(it.key(), event)) I'm going to retry with valgrind and paste the result somewhere.
And the valgrind output is here : http://kde.pastey.net/90047 lines 544 and following are the result of several movements over and off the trash icon in the panel. Forgot to mention : it seems plasma can properly recover after a crash now. I suspect the unrecoverable state occurs when a plasma-appletsrc is found while plasmarc doesn't exist (I'll test that later)
> a plasma-appletsrc is found while plasmarc doesn't exist which actually doesn't happen anymore after some changes i made a week or so ago, explaining why it comes back properly now ;)
Bah, I update my KDE build at least once a day :-) Thanks for the info.
SVN commit 824875 by aseigo: simplify this code, remove a bunch of duplication, re-order the calls in what should be the safest ordering and, most importantly for the bug report, remove the scene event filter from the handle immediately CCBUG:164849 M +12 -26 applethandle.cpp WebSVN link: http://websvn.kde.org/?view=rev&revision=824875
Thank you Aaron ! I can't reproduce the crash with this revision.
Closing this bug now. /hug aseigo