Here are the brief logs I captured: [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1". [New Thread 0xaf773090 (LWP 1953)] [New Thread 0xa9ebd090 (LWP 1954)] [New Thread 0xa8f45090 (LWP 1955)] [New Thread 0xa6f44090 (LWP 1956)] [New Thread 0xa4dff090 (LWP 1957)] [New Thread 0xa1ff4090 (LWP 1958)] [New Thread 0xa0ccc090 (LWP 1959)] [New Thread 0xa04cb090 (LWP 1960)] [New Thread 0x9fcca090 (LWP 1961)] [New Thread 0x9f4c9090 (LWP 1962)] [New Thread 0x9ecc8090 (LWP 1963)] [New Thread 0x9dfac090 (LWP 1964)] [New Thread 0x9bfab090 (LWP 1965)] [Thread 0x9bfab090 (LWP 1965) exited] [Thread 0xa0ccc090 (LWP 1959) exited] [New Thread 0xa0ccc090 (LWP 1970)] Thread 1 "kstars" received signal SIGSEGV, Segmentation fault. 0x006e9f68 in Ekos::FilterManager::initFilterProperties (this=this@entry=0x2beeca0) at ./kstars/oal/filter.h:44 #0 0x006e9f68 in Ekos::FilterManager::initFilterProperties (this=this@entry=0x2beeca0) at ./kstars/oal/filter.h:44 #1 0x006ea154 in Ekos::FilterManager::initFilterProperties (this=0x2beeca0) at ./kstars/ekos/auxiliary/filtermanager.cpp:237 #2 Ekos::FilterManager::setCurrentFilterWheel (this=0x2beeca0, filter=0x36ed910) at ./kstars/ekos/auxiliary/filtermanager.cpp:232 #3 0x0070173c in Ekos::Capture::checkFilter (this=this@entry=0x3ae6d28, filterNum=, filterNum@entry=1) at /usr/include/arm-linux-gnueabihf/qt5/QtCore/qsharedpointer_impl.h:312 #4 0x007086e4 in Ekos::Capture::addFilter (this=0x3ae6d28, newFilter=newFilter@entry=0x36ed910) at ./kstars/ekos/capture/capture.cpp:475 #5 0x006be654 in Ekos::Manager::setFilter (this=0x35e20f8, filterDevice=<optimized out>) at /usr/include/c++/8/bits/unique_ptr.h:342 #6 0xb4b68380 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5 #7 0x0060989e in INDIListener::newFilter (this=this@entry=0x38215d0, _t1=) at ./obj-arm-linux-gnueabihf/kstars/KStarsLib_autogen/FRI4DANIHA/moc_indilistener.cpp:415 #8 0x00670702 in INDIListener::registerProperty (this=0x38215d0, prop=0xa9542630) at ./kstars/indi/indilistener.cpp:282 #9 0xb4b64c68 in QMetaCallEvent::placeMetaCall(QObject*) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5 #10 0xb4b68bec in QObject::event(QEvent*) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5 #11 0xb545ddb4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/arm-linux-gnueabihf/libQt5Widgets.so.5 #12 0xb54662a8 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/arm-linux-gnueabihf/libQt5Widgets.so.5 #13 0x038215d0 in ?? () Backtrace stopped: previous frame identical to this frame (corrupt stack?) [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1". [New Thread 0xaf773090 (LWP 1981)] [New Thread 0xa9ebd090 (LWP 1982)] [New Thread 0xa8fad090 (LWP 1983)] [New Thread 0xa6fac090 (LWP 1984)] [New Thread 0xa4dff090 (LWP 1985)]Read More...