(gdb) info thread Id Target Id Frame * 1 LWP 2459 0x0000007fa2bda188 in read () at ../sysdeps/unix/syscall-template.S:86 2 LWP 2381 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0xfebd4c) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 3 LWP 2387 0x0000007fa2bda188 in read () at ../sysdeps/unix/syscall-template.S:86 4 LWP 2388 0x0000007fa1c87674 in mq_timedreceive () at ../sysdeps/unix/syscall-template.S:86 5 LWP 2389 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0x4cade8) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 6 LWP 2392 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0x4cb118) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 7 LWP 2393 ioctl () at ../sysdeps/unix/sysv/linux/aarch64/ioctl.S:26 8 LWP 2398 0x0000007fa2bde0e0 in __GI_ppoll (fds=fds@entry=0x7f94000b38, nfds=nfds@entry=2, timeout=, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/ppoll.c:39 9 LWP 2399 0x0000007fa2bde0e0 in __GI_ppoll (fds=fds@entry=0x7f8c000b38, nfds=nfds@entry=2, timeout=, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/ppoll.c:39 10 LWP 2400 0x0000007fa2bde0e0 in __GI_ppoll (fds=fds@entry=0x7f90001bf8, nfds=nfds@entry=2, timeout=, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/ppoll.c:39 11 LWP 2401 0x0000007fa2bde0e0 in __GI_ppoll (fds=fds@entry=0x7f84000ac8, nfds=nfds@entry=1, timeout=, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/ppoll.c:39 12 LWP 2402 0x0000007fa2bde0e0 in __GI_ppoll (fds=fds@entry=0x7f88000ac8, nfds=nfds@entry=1, timeout=, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/ppoll.c:39 13 LWP 2403 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0x6dda38) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 14 LWP 2404 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0x6ddcb8) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 15 LWP 2405 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0x68bd5c) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 16 LWP 2412 0x0000007fa2bde0e0 in __GI_ppoll (fds=fds@entry=0x7f74000ac8, nfds=nfds@entry=1, timeout=, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/ppoll.c:39 17 LWP 2414 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0x7bc008) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 18 LWP 2415 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0x7bc328) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 19 LWP 2416 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0x76a40c) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 20 LWP 2417 0x0000007fa2bde0e0 in __GI_ppoll (fds=fds@entry=0x7f68000ac8, nfds=nfds@entry=1, timeout=, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/ppoll.c:39 21 LWP 2418 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0x8997e8) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 22 LWP 2419 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0x899ae8) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 23 LWP 2421 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0x847c1c) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 24 LWP 2426 0x0000007fa261d884 in futex_abstimed_wait_cancelable (private=, abstime=0x7f6cf117a8, expected=0, futex_word=0x8fb73c) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:205 25 LWP 2427 0x0000007fa2bddfe4 in __GI___poll (fds=0x7f5c002030, nfds=3, timeout=) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/generic/poll.c:38 26 LWP 2457 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0xba3ef8) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 27 LWP 2458 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0x115af18) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 28 LWP 2460 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0x11cf238) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 (gdb) bt full #0 0x0000007fa2bda188 in read () at ../sysdeps/unix/syscall-template.S:86 No locals. #1 0x0000007fa27c7658 in drmHandleEvent (fd=8, evctx=evctx@entry=0x7f4202c6e8) at /usr/src/debug/libdrm/2.4.62-r0/libdrm/xf86drmMode.c:891 buffer = "\002\000\000\000 \000\000\000p\276W\000\000\000\000\000\274\001\000\000+\246\004\000\000\000\000\000\000\000\000\000\260", '\000' , "\b\211(\245\177", '\000' , "\020\276\377\244\177\000\000\000\260\000\000\000\000\000\000\000\360\320\002B\177\000\000\000\320'\376", '\000' , "`\303\002B\177\000\000\000,\371\375\242\177\000\000\000p\303\002B\177\000\000\000\360 \373\242\177\000\000\000\320+\031\001\000\000\000\000"... len = i = e = vblank = #2 0x0000007f9eee92e4 in QEglFSKmsGbmScreen::waitForFlip (this=0x57adf0) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmscreen.cpp:273 drmEvent = {version = 2, vblank_handler = 0x0, page_flip_handler = 0x7f9eee9e30 } lock = {val = 548127448345} this = 0x57adf0 #3 0x0000007f9f118d80 in QEglFSContext::swapBuffers (this=0xfe7fe0, surface=0xfe7ac0) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/plugins/platforms/eglfs/api/qeglfscontext.cpp:114 No locals. #4 0x0000007fa4a9d208 in QOpenGLContext::swapBuffers (this=0xfe6e10, surface=) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/gui/kernel/qopenglcontext.cpp:1115 surfaceHandle = 0xfe7ac0 #5 0x0000007fa503e940 in QSGRenderThread::syncAndRender (this=this@entry=0xfebab0) at /usr/src/debug/qtdeclarative/5.12.2+gitAUTOINC+cd7ce85ff0-r0/git/src/quick/scenegraph/qsgthreadedrenderloop.cpp:652 waitTimer = {t1 = 444, t2 = 300691079} repaintRequested = syncRequested = exposeRequested = false current = #6 0x0000007fa5041c4c in QSGRenderThread::run (this=0xfebab0) at /usr/src/debug/qtdeclarative/5.12.2+gitAUTOINC+cd7ce85ff0-r0/git/src/quick/scenegraph/qsgthreadedrenderloop.cpp:730 No locals. #7 0x0000007fa4039168 in QThreadPrivate::start (arg=0xfebab0) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/corelib/thread/qthread_unix.cpp:361 thr = 0xfebab0 data = __clframe = {__cancel_routine = 0x7fa40384f0 , __cancel_arg = 0xfebab0, __do_it = 1, __cancel_type = } #8 0x0000007fa2616fb8 in start_thread (arg=0x7fa263b000 <__pthread_keys+15728>) at /usr/src/debug/glibc/2.25-r0/git/nptl/pthread_create.c:458 pd = 0x7fa263b000 <__pthread_keys+15728> unwind_buf = {cancel_jmp_buf = {{jmp_buf = {546568327408, 549507561360, 549507561134, 549507561135, 548185288704, 548212543520, 0, 1, 546568327408, 16656336, 546568325344, 2834293180201040786, 0, 2834293180740033790, 0, 0, 0, 0, 0, 0, 0, 0}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}} not_first_call = pagesize_m1 = sp = freesize = __PRETTY_FUNCTION__ = "start_thread" #9 0x0000007fa2be652c in thread_start () at ../sysdeps/unix/sysv/linux/aarch64/clone.S:84 No locals. (gdb) thread 2 [Switching to thread 2 (LWP 2381)] #0 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0xfebd4c) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 88 /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h: No such file or directory. (gdb) bt full #0 0x0000007fa261d54c in futex_wait_cancelable (private=, expected=0, futex_word=0xfebd4c) at /usr/src/debug/glibc/2.25-r0/git/sysdeps/unix/sysv/linux/futex-internal.h:88 _x2tmp = 0 _x0tmp = 16694604 _x0 = 16694604 _x2 = 0 _x8 = 98 _x3tmp = 0 _x1tmp = 128 _x1 = 128 _x3 = 0 _sys_result = __ret = oldtype = 0 err = #1 __pthread_cond_wait_common (abstime=0x0, mutex=0xfebcf0, cond=0xfebd20) at /usr/src/debug/glibc/2.25-r0/git/nptl/pthread_cond_wait.c:502 spin = 0 buffer = {__routine = 0x7fa261d380 <__condvar_cleanup_waiting>, __arg = 0x7ff1340660, __canceltype = -248248704, __prev = 0x0} cbuffer = {wseq = 6435, cond = 0xfebd20, mutex = 0xfebcf0, private = 0} err = g = 1 flags = signals = 0 result = 0 seq = 3217 #2 __pthread_cond_wait (cond=0xfebd20, mutex=0xfebcf0) at /usr/src/debug/glibc/2.25-r0/git/nptl/pthread_cond_wait.c:655 No locals. #3 0x0000007fa40408fc in QWaitConditionPrivate::wait (deadline=..., this=0xfebcf0) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/corelib/thread/qwaitcondition_unix.cpp:146 code = #4 QWaitCondition::wait (this=, mutex=0xfebaf0, deadline=...) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/corelib/thread/qwaitcondition_unix.cpp:225 No locals. #5 0x0000007fa4040bd4 in QWaitCondition::wait (this=, mutex=, time=time@entry=18446744073709551615) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/corelib/thread/qwaitcondition_unix.cpp:208 No locals. #6 0x0000007fa503f388 in QSGThreadedRenderLoop::polishAndSync (this=this@entry=0x5af0e0, w=, inExpose=inExpose@entry=false) at /usr/src/debug/qtdeclarative/5.12.2+gitAUTOINC+cd7ce85ff0-r0/git/src/quick/scenegraph/qsgthreadedrenderloop.cpp:1211 window = 0x5af5d0 timer = {t1 = -9223372036854775808, t2 = -9223372036854775808} polishTime = 0 waitTime = 0 syncTime = 0 #7 0x0000007fa503fb9c in QSGThreadedRenderLoop::handleUpdateRequest (this=0x5af0e0, window=0x5af5d0) at /usr/src/debug/qtdeclarative/5.12.2+gitAUTOINC+cd7ce85ff0-r0/git/src/quick/scenegraph/qsgthreadedrenderloop.cpp:1036 No locals. #8 0x0000007fa5096e30 in QQuickWindow::event (this=0x5af5d0, e=0x7ff1340938) at /usr/src/debug/qtdeclarative/5.12.2+gitAUTOINC+cd7ce85ff0-r0/git/src/quick/items/qquickwindow.cpp:1654 No locals. #9 0x0000007fa420203c in QCoreApplication::notifyInternal2 (receiver=0x5af5d0, event=0x7ff1340938) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/corelib/kernel/qcoreapplication.cpp:1060 selfRequired = true result = false cbdata = {0x5af5d0, 0x7ff1340938, 0x7ff13408e7} d = threadData = 0x4a3a70 scopeLevelCounter = {threadData = 0x4a3a70} #10 0x0000007fa420223c in QCoreApplication::sendEvent (receiver=receiver@entry=0x5af5d0, event=event@entry=0x7ff1340938) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/corelib/kernel/qcoreapplication.cpp:1450 No locals. #11 0x0000007fa4a520f0 in QPlatformWindow::deliverUpdateRequest (this=) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/gui/kernel/qplatformwindow.cpp:786 w = 0x5af5d0 wp = request = {_vptr.QEvent = 0x7fa45166b8 , static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7fa43e7380 , data = 0x7fa43e6dd0 , static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}, d = 0x0, t = 77, posted = 0, spont = 0, m_accept = 1, reserved = 11} #12 QPlatformWindow::windowEvent (this=, event=) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/gui/kernel/qplatformwindow.cpp:478 No locals. #13 0x0000007fa4a5b5c4 in QGuiApplication::notify (this=0x7ff1340d50, object=0x5af5d0, event=0x7ff1340a58) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/gui/kernel/qguiapplication.cpp:1787 No locals. ---Type to continue, or q to quit---r #14 0x0000007fa420203c in QCoreApplication::notifyInternal2 (receiver=0x5af5d0, event=0x7ff1340a58) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/corelib/kernel/qcoreapplication.cpp:1060 selfRequired = true result = false cbdata = {0x5af5d0, 0x7ff1340a58, 0x7ff13409c7} d = threadData = 0x4a3a70 scopeLevelCounter = {threadData = 0x4a3a70} #15 0x0000007fa420223c in QCoreApplication::sendEvent (receiver=, event=event@entry=0x7ff1340a58) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/corelib/kernel/qcoreapplication.cpp:1450 No locals. #16 0x0000007fa425aa2c in QTimerInfoList::activateTimers (this=this@entry=0x4ab2c0) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/corelib/kernel/qtimerinfo_unix.cpp:643 e = { = {_vptr.QEvent = 0x7fa45166d8 , static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7fa43e7380 , data = 0x7fa43e6dd0 , static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}, d = 0x0, t = 1, posted = 0, spont = 0, m_accept = 1, reserved = 9}, id = 1} currentTimerInfo = 0x0 n_act = 1 maxCount = currentTime = {tv_sec = 444, tv_nsec = } #17 0x0000007fa4257b48 in QEventDispatcherUNIXPrivate::activateTimers (this=this@entry=0x4ab220) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/corelib/kernel/qeventdispatcher_unix.cpp:249 No locals. #18 0x0000007fa4258854 in QEventDispatcherUNIX::processEvents (this=, flags=..., flags@entry=...) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/corelib/kernel/qeventdispatcher_unix.cpp:514 d = 0x4ab220 include_timers = true include_notifiers = wait_for_events = canWait = tm = 0x7ff1340ae0 wait_tm = {tv_sec = 0, tv_nsec = 5000000} nevents = 0 #19 0x0000007f9f119484 in QUnixEventDispatcherQPA::processEvents (this=, flags=...) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/platformsupport/eventdispatchers/qunixeventdispatcher.cpp:63 didSendEvents = #20 0x0000007fa42007f4 in QEventLoop::exec (this=this@entry=0x7ff1340bf0, flags=..., flags@entry=...) at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/corelib/kernel/qeventloop.cpp:225 d = 0x918b60 locker = {val = 4864864} ref = {d = 0x918b60, locker = @0x7ff1340bd8, exceptionCaught = true} #21 0x0000007fa4209108 in QCoreApplication::exec () at /usr/src/debug/qtbase/5.12.2+gitAUTOINC+856fb1ab44-r0/git/src/corelib/kernel/qcoreapplication.cpp:1363 threadData = 0x4a3a70 eventLoop = { = {_vptr.QObject = 0x7fa4516490 , static staticMetaObject = {d = {superdata = 0x0, stringdata = 0x7fa43ea5f0 , data = 0x7fa43ea730 , static_metacall = 0x7fa4236fd8 , relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x918b60}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0x7fa43ed638 , data = 0x7fa43ea850 , static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x4598b0 , stringdata = 0x7fa43e62d0 , data = 0x7fa43e6330 , static_metacall = 0x7fa42004c8 , relatedMetaObjects = 0x0, extradata = 0x0}}} returnCode =