https://bugs.kde.org/show_bug.cgi?id=403563
--- Comment #20 from Jonathan Wakely <zi...@kayari.org> --- PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 22860 jwakely 20 0 2048664 399404 187656 S 96.3 0.6 0:32.10 QSGRenderThread 3222 jwakely 20 0 2048664 399404 187656 S 0.3 0.6 0:07.03 plasmashell 3238 jwakely 20 0 2048664 399404 187656 S 0.0 0.6 0:00.17 QDBusConnection 3239 jwakely 20 0 2048664 399404 187656 S 0.0 0.6 0:00.51 QXcbEventQueue 3352 jwakely 20 0 2048664 399404 187656 S 0.0 0.6 0:00.31 QQmlThread 3363 jwakely 20 0 2048664 399404 187656 S 0.0 0.6 0:00.31 Qt bearer threa 3508 jwakely 20 0 2048664 399404 187656 S 0.0 0.6 0:01.50 QQuickPixmapRea 3577 jwakely 20 0 2048664 399404 187656 S 0.0 0.6 0:00.00 CPMMListener 3588 jwakely 20 0 2048664 399404 187656 S 0.0 0.6 0:00.07 plasmashell 3728 jwakely 20 0 2048664 399404 187656 S 0.0 0.6 0:00.00 KCupsConnection 4218 jwakely 20 0 2048664 399404 187656 S 0.0 0.6 0:00.65 QSGRenderThread 8537 jwakely 20 0 2048664 399404 187656 S 0.0 0.6 0:00.34 QSGRenderThread 21405 jwakely 20 0 2048664 399404 187656 S 0.0 0.6 0:00.05 QSGRenderThread 21413 jwakely 20 0 2048664 399404 187656 S 0.0 0.6 0:00.38 QSGRenderThread That thread is running code from the nvidia drivers, so maybe that's where the problem is: Thread 14 (Thread 0x7fdd7d5ba6c0 (LWP 22860) "QSGRenderThread"): #0 0x00007fddcc52221f in __GI___poll (fds=0x7fdd7d5b95b8, nfds=1, timeout=1000) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007fddb2912a50 in () at /lib64/libnvidia-glcore.so.530.41.03 #2 0x00007fddb29c3e51 in () at /lib64/libnvidia-glcore.so.530.41.03 #3 0x00007fddb9aefe1c in () at /lib64/libGLX_nvidia.so.0 #4 0x00007fddb9abfe30 in () at /lib64/libGLX_nvidia.so.0 #5 0x00007fddc874fe21 in QGLXContext::swapBuffers(QPlatformSurface*) (this=0x7fdd582c79d0, surface=0x55b4cb438680) at qglxintegration.cpp:637 #6 0x00007fddcea479db in QSGRenderThread::syncAndRender(QImage*) (this=this@entry=0x55b4cd1bc1c0, grabImage=grabImage@entry=0x0) at scenegraph/qsgthreadedrenderloop.cpp:869 #7 0x00007fddcea480eb in QSGRenderThread::run() (this=0x55b4cd1bc1c0) at scenegraph/qsgthreadedrenderloop.cpp:1042 #8 0x00007fddccae855b in operator() (__closure=<optimized out>) at thread/qthread_unix.cpp:350 #9 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=<optimized out>) at thread/qthread_unix.cpp:287 #10 QThreadPrivate::start(void*) (arg=0x55b4cd1bc1c0) at thread/qthread_unix.cpp:310 #11 0x00007fddcc4ae12d in start_thread (arg=<optimized out>) at pthread_create.c:442 #12 0x00007fddcc52fbc0 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81 -- You are receiving this mail because: You are watching all bug changes.