I think this problem started happening for me after adding the repository ppa:graphics-drivers/ppa and installing the packages nvidia-driver-440 libnvidia-gl-440 libnvidia-gl-440:i386 libvulkan1 libvulkan1:i386. Here's the generated crash information: Application: ksmserver-logout-greeter (ksmserver-logout-greeter), signal: Aborted Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [Current thread is 1 (Thread 0x7f5cbc9713c0 (LWP 29214))] Thread 4 (Thread 0x7f5c9938d700 (LWP 29253)): #0 0x00007f5cb800fbf9 in __GI___poll (fds=0x7f5c8c004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f5cb0e365c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f5cb0e366dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f5cb89588ab in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f5cb88fd90a in QEventLoop::exec(QFlags) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f5cb871c23a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f5cba9846f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #7 0x00007f5cb872117d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f5cb7adf6db in start_thread (arg=0x7f5c9938d700) at pthread_create.c:463 #9 0x00007f5cb801c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 3 (Thread 0x7f5c9be17700 (LWP 29243)): #0 0x00007f5cb800fbf9 in __GI___poll (fds=0x7f5c9401b910, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f5cb0e365c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f5cb0e366dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f5cb89588ab in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f5cb88fd90a in QEventLoop::exec(QFlags) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f5cb871c23a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f5cb953ed45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5 #7 0x00007f5cb872117d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f5cb7adf6db in start_thread (arg=0x7f5c9be17700) at pthread_create.c:463 #9 0x00007f5cb801c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 2 (Thread 0x7f5ca63cf700 (LWP 29226)): #0 0x00007f5cb800fbf9 in __GI___poll (fds=0x7f5ca63cec68, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f5cb2d8f747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1 #2 0x00007f5cb2d9136a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1 #3 0x00007f5ca8b525e9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #4 0x00007f5cb872117d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f5cb7adf6db in start_thread (arg=0x7f5ca63cf700) at pthread_create.c:463 #6 0x00007f5cb801c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 1 (Thread 0x7f5cbc9713c0 (LWP 29214)): [KCrash Handler] #6 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51 #7 0x00007f5cb7f3b801 in __GI_abort () at abort.c:79 #8 0x00007f5cb870bfb7 in QMessageLogger::fatal(char const*, ...) const () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #9 0x00007f5cbb0562a7 in QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #10 0x00007f5cbb057275 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #11 0x00007f5cbb057e9a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #12 0x00007f5cb8ecd3d5 in QWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #13 0x00007f5cbb0cc6c5 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #14 0x0000558d75805241 in ?? () #15 0x00007f5cb9b0b83c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #16 0x00007f5cb9b13104 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #17 0x00007f5cb88ff8d8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #18 0x00007f5cb8ec249f in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #19 0x00007f5cb8ec30dd in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #20 0x00007f5cb8e9a2eb in QWindowSystemInterface::sendWindowSystemEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 #21 0x00007f5ca8bb7260 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #22 0x00007f5cb0e36417 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #23 0x00007f5cb0e36650 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #24 0x00007f5cb0e366dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #25 0x00007f5cb895888f in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #26 0x00007f5cb88fd90a in QEventLoop::exec(QFlags) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #27 0x00007f5cb89069b4 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #28 0x0000558d758021cd in ?? () #29 0x00007f5cb7f1cb97 in __libc_start_main (main=0x558d75801e10, argc=6, argv=0x7ffc20984008, init=, fini=, rtld_fini=, stack_end=0x7ffc20983ff8) at ../csu/libc-start.c:310 #30 0x0000558d7580237a in _start ()