SUMMARY *** When I start Kamoso with plugged USB camera, it can show picture, but when I unplug it with open Kamoso, it crashed with some logs in terminal *** STEPS TO REPRODUCE 1. Open Kamoso 2. Plug USB webcam 3. Unplug USB webcam OBSERVED RESULT Kamoso crashed with next log: (kamoso:14078): GLib-GObject-CRITICAL **: 16:07:58.798: g_object_notify: assertion 'G_IS_OBJECT (object)' failed Fatal glibc error: pthread_mutex_lock.c:130 (___pthread_mutex_lock): assertion failed: mutex->__data.__owner == 0 20 -- exe=/usr/bin/kamoso 17 -- platform=wayland 15 -- appname=kamoso 17 -- apppath=/usr/bin 9 -- signal=6 10 -- pid=14078 19 -- appversion=23.08.1 19 -- programname=Kamoso 31 -- bugaddress=submit@bugs.kde.org KCrash: Application 'kamoso' crashing... KCrash: Attempting to start /usr/libexec/drkonqi kf5idletime_wayland: This plugin does not support polling idle time [1] + 14078 suspended (signal) kamoso EXPECTED RESULT Nothing crashed, Kamoso black screen again SOFTWARE/OS VERSIONS Operating System: openSUSE Tumbleweed 20230926 KDE Plasma Version: 5.27.8 KDE Frameworks Version: 5.110.0 Qt Version: 5.15.10 Kernel Version: 6.5.4-1-default (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 7 5700X 8-Core Processor Memory: 31.2 GiB of RAM Graphics Processor: AMD Radeon RX 6900 XT Manufacturer: ASUS
Crash report with debugging symbols here. Looks like what needed? [KCrash Handler] #4 g_type_check_instance_is_fundamentally_a (type_instance=type_instance@entry=0x563fd78178f0, fundamental_type=fundamental_type@entry=80) at ../gobject/gtype.c:4184 #5 0x00007f53ab4e6428 in g_object_notify (object=0x563fd78178f0, property_name=0x7f53654608c9 "zoom") at ../gobject/gobject.c:1583 #6 0x00007f53ab4df468 in g_closure_invoke (closure=0x563fd78d5010, return_value=0x0, n_param_values=2, param_values=0x7ffebf06a440, invocation_hint=0x7ffebf06a390) at ../gobject/gclosure.c:832 #7 0x00007f53ab4f261c in signal_emit_unlocked_R (node=node@entry=0x7ffebf06a510, detail=detail@entry=2562, instance=instance@entry=0x563fd779dea0, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7ffebf06a440) at ../gobject/gsignal.c:3980 #8 0x00007f53ab4f4031 in signal_emit_valist_unlocked (instance=instance@entry=0x563fd779dea0, signal_id=signal_id@entry=1, detail=detail@entry=2562, var_args=var_args@entry=0x7ffebf06a670) at ../gobject/gsignal.c:3612 #9 0x00007f53ab4f9ce2 in g_signal_emit_valist (instance=0x563fd779dea0, signal_id=1, detail=2562, var_args=0x7ffebf06a670) at ../gobject/gsignal.c:3355 #10 0x00007f53ab4f9d8f in g_signal_emit (instance=instance@entry=0x563fd779dea0, signal_id=<optimized out>, detail=<optimized out>) at ../gobject/gsignal.c:3675 #11 0x00007f53ab4e36e4 in g_object_dispatch_properties_changed (object=0x563fd779dea0, n_pspecs=<optimized out>, pspecs=<optimized out>) at ../gobject/gobject.c:1427 #12 0x00007f53a96ec1e4 in gst_object_dispatch_properties_changed (object=0x563fd779dea0, n_pspecs=1, pspecs=0x7ffebf06a7e0) at ../gst/gstobject.c:455 #13 0x00007f53ab4e4038 in g_object_notify_queue_thaw (object=0x563fd779dea0, nqueue=<optimized out>) at ../gobject/gobject.c:358 #14 0x00007f53ab4e7ee6 in g_object_set_valist (var_args=0x7ffebf06a970, first_property_name=<optimized out>, object=<optimized out>) at ../gobject/gobject.c:2792 #15 g_object_set_valist (object=<optimized out>, first_property_name=<optimized out>, var_args=0x7ffebf06a970) at ../gobject/gobject.c:2741 #16 0x00007f53ab4e8ac3 in g_object_set (_object=0x563fd779dea0, first_property_name=first_property_name@entry=0x7f53654608c9 "zoom") at ../gobject/gobject.c:2956 #17 0x00007f536545ccb1 in gst_camera_bin_create_elements (camera=0x563fd7ae7b20) at ../gst/camerabin2/gstcamerabin2.c:1742 #18 gst_camera_bin_change_state (element=0x563fd7ae7b20, trans=GST_STATE_CHANGE_NULL_TO_READY) at ../gst/camerabin2/gstcamerabin2.c:1891 #19 0x00007f53a971a47b in gst_element_change_state (element=element@entry=0x563fd7ae7b20, transition=transition@entry=GST_STATE_CHANGE_NULL_TO_READY) at ../gst/gstelement.c:3093 #20 0x00007f53a971ad0b in gst_element_set_state_func (element=0x563fd7ae7b20, state=GST_STATE_READY) at ../gst/gstelement.c:3047 #21 0x0000563fd5874a30 in WebcamControl::playDevice (this=0x7ffebf06b060, device=0x563fd732f050) at /usr/include/qt5/QtCore/qscopedpointer.h:138 #22 0x0000563fd5875d3d in WebcamControl::onBusMessage (message=<optimized out>, this=<optimized out>) at /usr/src/debug/kamoso-23.08.1/src/video/webcamcontrol.cpp:308 #23 webcamWatch (message=<optimized out>, user_data=0x7ffebf06b060) at /usr/src/debug/kamoso-23.08.1/src/video/webcamcontrol.cpp:244 #24 0x00007f53a9702131 in gst_bus_source_dispatch (source=0x563fd7058060, callback=0x563fd5875ad0 <webcamWatch(GstBus*, GstMessage*, gpointer)>, user_data=0x7ffebf06b060) at ../gst/gstbus.c:821 #25 0x00007f53a95bcef0 in ?? () from /lib64/libglib-2.0.so.0 #26 0x00007f53a95beb18 in ?? () from /lib64/libglib-2.0.so.0 #27 0x00007f53a95bf1cc in g_main_context_iteration () from /lib64/libglib-2.0.so.0 #28 0x00007f53a9b464a6 in QEventDispatcherGlib::processEvents (this=0x563fd6e62e10, flags=...) at kernel/qeventdispatcher_glib.cpp:423 #29 0x00007f53a9aebffb in QEventLoop::exec (this=this@entry=0x7ffebf06ae70, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69 #30 0x00007f53a9af4490 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121 #31 0x0000563fd587077d in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/kamoso-23.08.1/src/main.cpp:47 [Inferior 1 (process 15274) detached]