(gdb) t a a bt Thread 6 (Thread 0x7f8c51f41700 (LWP 1678)): #0 0x00007f8d032060fd in poll () from /usr/x86_64-pc-linux-gnu/lib/libc.so.6 #1 0x00007f8cfb599fdc in g_main_context_iterate.isra () from /usr/x86_64-pc-linux-gnu/lib/libglib-2.0.so.0 #2 0x00007f8cfb59a0e4 in g_main_context_iteration () from /usr/x86_64-pc-linux-gnu/lib/libglib-2.0.so.0 #3 0x00007f8d03dd81eb in QEventDispatcherGlib::processEvents (this=0x7f8c4c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425 #4 0x00007f8d03d84b92 in QEventLoop::exec (this=this@entry=0x7f8c51f40d30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210 #5 0x00007f8d03be429b in QThread::exec (this=) at thread/qthread.cpp:507 #6 0x00007f8d08a51a62 in QQuickPixmapReader::run() () from /usr/x86_64-pc-linux-gnu/lib/libQt5Quick.so.5 #7 0x00007f8d03be98fd in QThreadPrivate::start (arg=0x257f220) at thread/qthread_unix.cpp:344 #8 0x00007f8d02571344 in start_thread () from /usr/x86_64-pc-linux-gnu/lib/libpthread.so.0 #9 0x00007f8d0320efad in clone () from /usr/x86_64-pc-linux-gnu/lib/libc.so.6 Thread 5 (Thread 0x7f8ce9831700 (LWP 1629)): #0 0x00007f8d032060fd in poll () from /usr/x86_64-pc-linux-gnu/lib/libc.so.6 #1 0x00007f8cfb599fdc in g_main_context_iterate.isra () from /usr/x86_64-pc-linux-gnu/lib/libglib-2.0.so.0 #2 0x00007f8cfb59a0e4 in g_main_context_iteration () from /usr/x86_64-pc-linux-gnu/lib/libglib-2.0.so.0 #3 0x00007f8d03dd81c7 in QEventDispatcherGlib::processEvents (this=0x7f8cd80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:423 #4 0x00007f8d03d84b92 in QEventLoop::exec (this=this@entry=0x7f8ce9830d70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210 #5 0x00007f8d03be429b in QThread::exec (this=) at thread/qthread.cpp:507 #6 0x00007f8d07eabea5 in QQmlThreadPrivate::run() () from /usr/x86_64-pc-linux-gnu/lib/libQt5Qml.so.5 #7 0x00007f8d03be98fd in QThreadPrivate::start (arg=0x2211520) at thread/qthread_unix.cpp:344 #8 0x00007f8d02571344 in start_thread () from /usr/x86_64-pc-linux-gnu/lib/libpthread.so.0 #9 0x00007f8d0320efad in clone () from /usr/x86_64-pc-linux-gnu/lib/libc.so.6 Thread 4 (Thread 0x7f8ceb5e9700 (LWP 1620)): #0 0x00007f8d032060fd in poll () from /usr/x86_64-pc-linux-gnu/lib/libc.so.6 #1 0x00007f8cfb599fdc in g_main_context_iterate.isra () from /usr/x86_64-pc-linux-gnu/lib/libglib-2.0.so.0 #2 0x00007f8cfb59a0e4 in g_main_context_iteration () from /usr/x86_64-pc-linux-gnu/lib/libglib-2.0.so.0 #3 0x00007f8d03dd81eb in QEventDispatcherGlib::processEvents (this=0x7f8ce00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425 #4 0x00007f8d03d84b92 in QEventLoop::exec (this=this@entry=0x7f8ceb5e8d70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210 #5 0x00007f8d03be429b in QThread::exec (this=) at thread/qthread.cpp:507 #6 0x00007f8d07eabea5 in QQmlThreadPrivate::run() () from /usr/x86_64-pc-linux-gnu/lib/libQt5Qml.so.5 #7 0x00007f8d03be98fd in QThreadPrivate::start (arg=0x2166dd0) at thread/qthread_unix.cpp:344 #8 0x00007f8d02571344 in start_thread () from /usr/x86_64-pc-linux-gnu/lib/libpthread.so.0 #9 0x00007f8d0320efad in clone () from /usr/x86_64-pc-linux-gnu/lib/libc.so.6 Thread 3 (Thread 0x7f8cf1111700 (LWP 1616)): #0 0x00007f8d032060fd in poll () from /usr/x86_64-pc-linux-gnu/lib/libc.so.6 #1 0x00007f8cfb599fdc in g_main_context_iterate.isra () from /usr/x86_64-pc-linux-gnu/lib/libglib-2.0.so.0 #2 0x00007f8cfb59a0e4 in g_main_context_iteration () from /usr/x86_64-pc-linux-gnu/lib/libglib-2.0.so.0 #3 0x00007f8d03dd81eb in QEventDispatcherGlib::processEvents (this=0x7f8ce40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425 #4 0x00007f8d03d84b92 in QEventLoop::exec (this=this@entry=0x7f8cf1110d60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210 #5 0x00007f8d03be429b in QThread::exec (this=this@entry=0x7f8d04b5cfe0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:507 #6 0x00007f8d048e00c8 in QDBusConnectionManager::run (this=0x7f8d04b5cfe0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:196 #7 0x00007f8d03be98fd in QThreadPrivate::start (arg=0x7f8d04b5cfe0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:344 #8 0x00007f8d02571344 in start_thread () from /usr/x86_64-pc-linux-gnu/lib/libpthread.so.0 #9 0x00007f8d0320efad in clone () from /usr/x86_64-pc-linux-gnu/lib/libc.so.6 Thread 2 (Thread 0x7f8cf2da1700 (LWP 1615)): #0 0x00007f8d02576e3f in pthread_cond_wait () from /usr/x86_64-pc-linux-gnu/lib/libpthread.so.0 #1 0x00007f8d09446a19 in _xcb_conn_wait () from /usr/x86_64-pc-linux-gnu/lib/libxcb.so.1 #2 0x00007f8d09448457 in xcb_wait_for_event () from /usr/x86_64-pc-linux-gnu/lib/libxcb.so.1 #3 0x00007f8cf5595239 in QXcbEventReader::run (this=0x20840c0) at qxcbconnection.cpp:1337 #4 0x00007f8d03be98fd in QThreadPrivate::start (arg=0x20840c0) at thread/qthread_unix.cpp:344 #5 0x00007f8d02571344 in start_thread () from /usr/x86_64-pc-linux-gnu/lib/libpthread.so.0 #6 0x00007f8d0320efad in clone () from /usr/x86_64-pc-linux-gnu/lib/libc.so.6 Thread 1 (Thread 0x7f8d0b56b840 (LWP 1613)): #0 0x00007f8d032060fd in poll () from /usr/x86_64-pc-linux-gnu/lib/libc.so.6 #1 0x00007f8d094467da in _xcb_conn_wait () from /usr/x86_64-pc-linux-gnu/lib/libxcb.so.1 #2 0x00007f8d09448509 in xcb_wait_for_special_event () from /usr/x86_64-pc-linux-gnu/lib/libxcb.so.1 #3 0x00007f8d00b9e6ce in dri3_find_back () from /usr/x86_64-pc-linux-gnu/lib/libGL.so.1 #4 0x00007f8d00b9f3d0 in loader_dri3_get_buffers () from /usr/x86_64-pc-linux-gnu/lib/libGL.so.1 #5 0x00007f8cddc7dad4 in dri2_allocate_textures () from /usr/x86_64-pc-linux-gnu/lib/dri/radeonsi_dri.so #6 0x00007f8cddc7ac3c in dri_st_framebuffer_validate () from /usr/x86_64-pc-linux-gnu/lib/dri/radeonsi_dri.so #7 0x00007f8cddba8ffe in st_framebuffer_validate () from /usr/x86_64-pc-linux-gnu/lib/dri/radeonsi_dri.so #8 0x00007f8cddbaa469 in st_manager_validate_framebuffers () from /usr/x86_64-pc-linux-gnu/lib/dri/radeonsi_dri.so #9 0x00007f8cddb597a0 in st_validate_state () from /usr/x86_64-pc-linux-gnu/lib/dri/radeonsi_dri.so #10 0x00007f8cddb61031 in st_Clear () from /usr/x86_64-pc-linux-gnu/lib/dri/radeonsi_dri.so #11 0x00007f8d08a8295b in QSGBatchRenderer::Renderer::renderBatches() () from /usr/x86_64-pc-linux-gnu/lib/libQt5Quick.so.5 #12 0x00007f8d08a87f73 in QSGBatchRenderer::Renderer::render() () from /usr/x86_64-pc-linux-gnu/lib/libQt5Quick.so.5 #13 0x00007f8d08a94cff in QSGRenderer::renderScene(QSGBindable const&) () from /usr/x86_64-pc-linux-gnu/lib/libQt5Quick.so.5 #14 0x00007f8d08a95423 in QSGRenderer::renderScene(unsigned int) () from /usr/x86_64-pc-linux-gnu/lib/libQt5Quick.so.5 #15 0x00007f8d08aa785e in QSGRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () from /usr/x86_64-pc-linux-gnu/lib/libQt5Quick.so.5 #16 0x00007f8d08af36f6 in QQuickWindowPrivate::renderSceneGraph(QSize const&) () from /usr/x86_64-pc-linux-gnu/lib/libQt5Quick.so.5 #17 0x00007f8d08ac09bc in QSGGuiThreadRenderLoop::renderWindow(QQuickWindow*) () from /usr/x86_64-pc-linux-gnu/lib/libQt5Quick.so.5 #18 0x00007f8d08afe3e3 in QQuickWindow::event(QEvent*) () from /usr/x86_64-pc-linux-gnu/lib/libQt5Quick.so.5 #19 0x000000000042d17b in PanelView::event(QEvent*) () #20 0x00007f8d04ef6f84 in QApplicationPrivate::notify_helper (this=, receiver=0x27cfdf0, e=0x7ffd5af2ec80) at kernel/qapplication.cpp:3799 #21 0x00007f8d04efe45d in QApplication::notify (this=0x7ffd5af2f550, receiver=0x27cfdf0, e=0x7ffd5af2ec80) at kernel/qapplication.cpp:3556 #22 0x00007f8d03d86319 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x27cfdf0, event=event@entry=0x7ffd5af2ec80) at kernel/qcoreapplication.cpp:988 #23 0x00007f8d042efe9e in QCoreApplication::sendEvent (event=0x7ffd5af2ec80, receiver=) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231 #24 QWindowPrivate::deliverUpdateRequest (this=this@entry=0x2789d10) at kernel/qwindow.cpp:2171 #25 0x00007f8d042f0349 in QWindow::event (this=0x27cfdf0, ev=) at kernel/qwindow.cpp:2142 #26 0x00007f8d08afe405 in QQuickWindow::event(QEvent*) () from /usr/x86_64-pc-linux-gnu/lib/libQt5Quick.so.5 #27 0x000000000042d17b in PanelView::event(QEvent*) () #28 0x00007f8d04ef6f84 in QApplicationPrivate::notify_helper (this=, receiver=0x27cfdf0, e=0x7ffd5af2f1c0) at kernel/qapplication.cpp:3799 #29 0x00007f8d04efe45d in QApplication::notify (this=0x7ffd5af2f550, receiver=0x27cfdf0, e=0x7ffd5af2f1c0) at kernel/qapplication.cpp:3556 #30 0x00007f8d03d86319 in QCoreApplication::notifyInternal2 (receiver=0x27cfdf0, event=event@entry=0x7ffd5af2f1c0) at kernel/qcoreapplication.cpp:988 #31 0x00007f8d03dd77fb in QCoreApplication::sendEvent (event=0x7ffd5af2f1c0, receiver=) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231 #32 QTimerInfoList::activateTimers (this=0x20cd380) at kernel/qtimerinfo_unix.cpp:644 #33 0x00007f8d03dd7dcc in timerSourceDispatch (source=) at kernel/qeventdispatcher_glib.cpp:182 #34 idleTimerSourceDispatch (source=) at kernel/qeventdispatcher_glib.cpp:229 #35 0x00007f8cfb599e0e in g_main_context_dispatch () from /usr/x86_64-pc-linux-gnu/lib/libglib-2.0.so.0 #36 0x00007f8cfb59a040 in g_main_context_iterate.isra () from /usr/x86_64-pc-linux-gnu/lib/libglib-2.0.so.0 #37 0x00007f8cfb59a0e4 in g_main_context_iteration () from /usr/x86_64-pc-linux-gnu/lib/libglib-2.0.so.0 #38 0x00007f8d03dd81c7 in QEventDispatcherGlib::processEvents (this=0x20d6a50, flags=...) at kernel/qeventdispatcher_glib.cpp:423 #39 0x00007f8d03d84b92 in QEventLoop::exec (this=this@entry=0x7ffd5af2f3f0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210 #40 0x00007f8d03d8d1d5 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261 #41 0x000000000041b78b in main ()