Application: plasmashell (5.18.0) Qt Version: 5.13.2 Frameworks Version: 5.67.0 Operating System: Linux 5.3.0-28-generic x86_64 Windowing system: X11 Distribution: KDE neon User Edition 5.18 -- Information about the crash: - What I was doing when the application crashed: I had applied updates using discover today, since then plasma crashes each time i log in, I have rebooted and the problem persists - Unusual behavior I noticed: No background on desktop, slowness, no widgets or panels displayed - Custom settings of the application: I have several panels and widgets therein but all has funtioned satisfactorily until today The crash can be reproduced every time. -- Backtrace: Application: Plasma (plasmashell), signal: Segmentation fault Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [Current thread is 1 (Thread 0x7f3f26170800 (LWP 2109))] Thread 15 (Thread 0x7f3e9ffff700 (LWP 2911)): #0 0x00007f3f1cca99f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c3362aabc4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 #1 0x00007f3f1cca99f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55c3362aab70, cond=0x55c3362aab98) at pthread_cond_wait.c:502 #2 0x00007f3f1cca99f3 in __pthread_cond_wait (cond=0x55c3362aab98, mutex=0x55c3362aab70) at pthread_cond_wait.c:655 #3 0x00007f3f1fd7faeb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f3f1fd7fdf9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f3f23d88ec8 in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #6 0x00007f3f23d892fa in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #7 0x00007f3f1fd78b52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f3f1cca36db in start_thread (arg=0x7f3e9ffff700) at pthread_create.c:463 #9 0x00007f3f1f67588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 14 (Thread 0x7f3eacdbb700 (LWP 2909)): #0 0x00007f3f1cca99f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c3362a8884) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 #1 0x00007f3f1cca99f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55c3362a8830, cond=0x55c3362a8858) at pthread_cond_wait.c:502 #2 0x00007f3f1cca99f3 in __pthread_cond_wait (cond=0x55c3362a8858, mutex=0x55c3362a8830) at pthread_cond_wait.c:655 #3 0x00007f3f1fd7faeb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f3f1fd7fdf9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f3f23d88ec8 in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #6 0x00007f3f23d892fa in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #7 0x00007f3f1fd78b52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f3f1cca36db in start_thread (arg=0x7f3eacdbb700) at pthread_create.c:463 #9 0x00007f3f1f67588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 13 (Thread 0x7f3ead7d4700 (LWP 2906)): #0 0x00007f3f1cca99f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c336135d14) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 #1 0x00007f3f1cca99f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55c336135cc0, cond=0x55c336135ce8) at pthread_cond_wait.c:502 #2 0x00007f3f1cca99f3 in __pthread_cond_wait (cond=0x55c336135ce8, mutex=0x55c336135cc0) at pthread_cond_wait.c:655 #3 0x00007f3f1fd7faeb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f3f1fd7fdf9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f3f23d88ec8 in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #6 0x00007f3f23d892fa in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #7 0x00007f3f1fd78b52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f3f1cca36db in start_thread (arg=0x7f3ead7d4700) at pthread_create.c:463 #9 0x00007f3f1f67588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 12 (Thread 0x7f3eae262700 (LWP 2903)): #0 0x00007f3f1cca99f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c335facec4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 #1 0x00007f3f1cca99f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55c335face70, cond=0x55c335face98) at pthread_cond_wait.c:502 #2 0x00007f3f1cca99f3 in __pthread_cond_wait (cond=0x55c335face98, mutex=0x55c335face70) at pthread_cond_wait.c:655 #3 0x00007f3f1fd7faeb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f3f1fd7fdf9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f3f23d88ec8 in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #6 0x00007f3f23d892fa in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #7 0x00007f3f1fd78b52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f3f1cca36db in start_thread (arg=0x7f3eae262700) at pthread_create.c:463 #9 0x00007f3f1f67588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 11 (Thread 0x7f3eb9fd9700 (LWP 2891)): #0 0x00007f3f19a15f08 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #1 0x00007f3f19a16570 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f3f19a166dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f3f1ffbbacb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f3f1ff5bf9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f3f1fd773aa in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f3eb12cb407 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so #7 0x00007f3f1fd78b52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f3f1cca36db in start_thread (arg=0x7f3eb9fd9700) at pthread_create.c:463 #9 0x00007f3f1f67588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 10 (Thread 0x7f3ee1acf700 (LWP 2508)): #0 0x00007f3f1f668bf9 in __GI___poll (fds=0x7f3ecc006920, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f3f19a165c9 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f3f19a166dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f3f1ffbbacb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f3f1ff5bf9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f3f1fd773aa in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f3f23d02ac6 in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #7 0x00007f3f1fd78b52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f3f1cca36db in start_thread (arg=0x7f3ee1acf700) at pthread_create.c:463 #9 0x00007f3f1f67588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 9 (Thread 0x7f3ee23d0700 (LWP 2497)): #0 0x00007f3f1cca99f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c3335abec4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 #1 0x00007f3f1cca99f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55c3335abe70, cond=0x55c3335abe98) at pthread_cond_wait.c:502 #2 0x00007f3f1cca99f3 in __pthread_cond_wait (cond=0x55c3335abe98, mutex=0x55c3335abe70) at pthread_cond_wait.c:655 #3 0x00007f3f1fd7faeb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f3f1fd7fdf9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f3f23d88ec8 in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #6 0x00007f3f23d892fa in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #7 0x00007f3f1fd78b52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f3f1cca36db in start_thread (arg=0x7f3ee23d0700) at pthread_create.c:463 #9 0x00007f3f1f67588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 8 (Thread 0x7f3ee2cd1700 (LWP 2493)): #0 0x00007f3f1cca99f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c333517854) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 #1 0x00007f3f1cca99f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55c333517800, cond=0x55c333517828) at pthread_cond_wait.c:502 #2 0x00007f3f1cca99f3 in __pthread_cond_wait (cond=0x55c333517828, mutex=0x55c333517800) at pthread_cond_wait.c:655 #3 0x00007f3f1fd7faeb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f3f1fd7fdf9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f3f23d88ec8 in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #6 0x00007f3f23d892fa in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #7 0x00007f3f1fd78b52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f3f1cca36db in start_thread (arg=0x7f3ee2cd1700) at pthread_create.c:463 #9 0x00007f3f1f67588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 7 (Thread 0x7f3ee35d2700 (LWP 2488)): #0 0x00007f3f1cca99f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c333491e70) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 #1 0x00007f3f1cca99f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55c333491e20, cond=0x55c333491e48) at pthread_cond_wait.c:502 #2 0x00007f3f1cca99f3 in __pthread_cond_wait (cond=0x55c333491e48, mutex=0x55c333491e20) at pthread_cond_wait.c:655 #3 0x00007f3f1fd7faeb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f3f1fd7fdf9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f3f23d88ec8 in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #6 0x00007f3f23d892fa in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #7 0x00007f3f1fd78b52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f3f1cca36db in start_thread (arg=0x7f3ee35d2700) at pthread_create.c:463 #9 0x00007f3f1f67588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 6 (Thread 0x7f3ef4f89700 (LWP 2376)): #0 0x00007f3f1cca99f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c332e8a7c8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 #1 0x00007f3f1cca99f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55c332e8a778, cond=0x55c332e8a7a0) at pthread_cond_wait.c:502 #2 0x00007f3f1cca99f3 in __pthread_cond_wait (cond=0x55c332e8a7a0, mutex=0x55c332e8a778) at pthread_cond_wait.c:655 #3 0x00007f3efb0d385b in () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so #4 0x00007f3efb0d3457 in () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so #5 0x00007f3f1cca36db in start_thread (arg=0x7f3ef4f89700) at pthread_create.c:463 #6 0x00007f3f1f67588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 5 (Thread 0x7f3ef5fcc700 (LWP 2375)): #0 0x00007f3f1cca99f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c332f7e9a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 #1 0x00007f3f1cca99f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55c332f7e950, cond=0x55c332f7e978) at pthread_cond_wait.c:502 #2 0x00007f3f1cca99f3 in __pthread_cond_wait (cond=0x55c332f7e978, mutex=0x55c332f7e950) at pthread_cond_wait.c:655 #3 0x00007f3efb0d385b in () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so #4 0x00007f3efb0d3457 in () at /usr/lib/x86_64-linux-gnu/dri/r600_dri.so #5 0x00007f3f1cca36db in start_thread (arg=0x7f3ef5fcc700) at pthread_create.c:463 #6 0x00007f3f1f67588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 4 (Thread 0x7f3f08e33700 (LWP 2224)): #0 0x00007f3f1f668bf9 in __GI___poll (fds=0x7f3efc004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f3f19a165c9 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f3f19a166dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f3f1ffbbacb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f3f1ff5bf9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f3f1fd773aa in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f3f23830815 in () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #7 0x00007f3f1fd78b52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f3f1cca36db in start_thread (arg=0x7f3f08e33700) at pthread_create.c:463 #9 0x00007f3f1f67588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 3 (Thread 0x7f3f0aebd700 (LWP 2132)): #0 0x00007f3f1f668bf9 in __GI___poll (fds=0x7f3f04004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f3f19a165c9 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f3f19a166dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f3f1ffbbacb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f3f1ff5bf9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f3f1fd773aa in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f3f21b770e5 in () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5 #7 0x00007f3f1fd78b52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f3f1cca36db in start_thread (arg=0x7f3f0aebd700) at pthread_create.c:463 #9 0x00007f3f1f67588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 2 (Thread 0x7f3f11159700 (LWP 2124)): #0 0x00007f3f1f668bf9 in __GI___poll (fds=0x7f3f11158ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f3f24961747 in () at /usr/lib/x86_64-linux-gnu/libxcb.so.1 #2 0x00007f3f2496336a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1 #3 0x00007f3f13b2ae10 in () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #4 0x00007f3f1fd78b52 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f3f1cca36db in start_thread (arg=0x7f3f11159700) at pthread_create.c:463 #6 0x00007f3f1f67588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 1 (Thread 0x7f3f26170800 (LWP 2109)): [KCrash Handler] #6 0x00007f3f17107b2a in FT_Get_PS_Font_Info () at /usr/lib/x86_64-linux-gnu/libfreetype.so.6 #7 0x00007f3f13b96edd in () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #8 0x00007f3f13b9c3a0 in () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #9 0x00007f3f13ba0c1d in () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #10 0x00007f3f2060e313 in () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #11 0x00007f3f20610aac in QFontDatabase::findFont(QFontDef const&, int) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #12 0x00007f3f205fb1ff in QFontEngineMulti::loadEngine(int) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #13 0x00007f3f205fb6fd in QFontEngineMulti::ensureEngineAt(int) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #14 0x00007f3f205fbcef in QFontEngineMulti::stringToCMap(QChar const*, int, QGlyphLayout*, int*, QFlags<QFontEngine::ShaperFlag>) const () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #15 0x00007f3f2061d2e9 in QTextEngine::shapeText(int) const () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #16 0x00007f3f2061df69 in QTextEngine::shape(int) const () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #17 0x00007f3f20630e37 in QTextLine::layout_helper(int) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #18 0x00007f3f20631e2d in QTextLine::setLineWidth(double) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #19 0x00007f3f23e25d8e in QQuickTextPrivate::setLineGeometry(QTextLine&, double, double&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #20 0x00007f3f23e26bce in QQuickTextPrivate::setupTextLayout(double*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #21 0x00007f3f23e2905c in QQuickTextPrivate::updateSize() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #22 0x00007f3f23e29fdf in QQuickTextPrivate::updateLayout() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #23 0x00007f3f23e2a83f in QQuickText::setText(QString const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #24 0x00007f3f23e2c7b9 in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #25 0x00007f3f2380983f in () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #26 0x00007f3f23809f77 in () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #27 0x00007f3f23806543 in QQmlBinding::update(QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #28 0x00007f3f237dfc42 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #29 0x00007f3f23786f99 in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #30 0x00007f3f1ff8e027 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #31 0x00007f3f23782dc0 in QQmlVMEMetaObject::metaCall(QObject*, QMetaObject::Call, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #32 0x00007f3f1ff6cbc5 in QMetaProperty::write(QObject*, QVariant const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #33 0x00007f3f1ff96cf0 in QObject::setProperty(char const*, QVariant const&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #34 0x00007f3ef40ed04a in () at /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/core/libcorebindingsplugin.so #35 0x00007f3f1ff8e91f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #36 0x00007f3f1ff9b537 in QTimer::timeout(QTimer::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #37 0x00007f3f1ff9b898 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #38 0x00007f3f1ff8f31b in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #39 0x00007f3f211b6eac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #40 0x00007f3f211be4b0 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #41 0x00007f3f1ff5de38 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #42 0x00007f3f1ffbaf39 in QTimerInfoList::activateTimers() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #43 0x00007f3f1ffbb701 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #44 0x00007f3f19a16417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #45 0x00007f3f19a16650 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #46 0x00007f3f19a166dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #47 0x00007f3f1ffbbaaf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #48 0x00007f3f1ff5bf9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #49 0x00007f3f1ff65310 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #50 0x000055c331c66894 in () #51 0x00007f3f1f575b97 in __libc_start_main (main=0x55c331c65a70, argc=1, argv=0x7ffcab146498, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffcab146488) at ../csu/libc-start.c:310 #52 0x000055c331c669fa in _start () Possible duplicates by query: bug 275848, bug 233048. Reported using DrKonqi
OK, I may have over-reacted slightly, this was annoying me so I had a bit of a go at fixing it. I notice that the problem happened only when one particular panel was unhidden by a mouse hover, so I dragged all the widgets on it to the desktop, deleted the now blank panel, created a new panel and dragged all the widgets back on and put it back where the old one was. It now (fingers crossed) seems to be OK!
Crashes either in libfreetype or Qt.