Created attachment 1153745 [details] Backtrace of the forzen konsole process Description of problem: From time to time, one of my konsole (KDE terminal) freezes. The backtrace shows that is it stuck in `pa_threaded_mainloop_wait` from Pulseaudio, waiting on a dead lock. Version-Release number of selected component (if applicable): phonon-qt5-4.8.3-7.fc23.x86_64 pulseaudio-7.1-1.fc23.x86_64 qt5-qtbase-5.6.0-9.fc23.x86_64 konsole5-15.12.3-2.fc23.x86_64 kf5-kcoreaddons-5.21.0-1.fc23.x86_64 Konsole version dialog says: Version 15.12.3 KDE Frameworks 5.21.0 Qt 5.6.0 (built against 5.5.1) How reproducible: I do not know. That is highly non-reproducable, and not frequent (about once a week, for a machine I work on full weeks day). I attached the backtrace.
nvidia is likely the culprit here, Thread 2 (Thread 0x7fb57cc3b700 (LWP 52481)): #0 0x00007fb59f11ee15 in _nv014tls () at /usr/lib64/nvidia/tls/libnvidia-tls.so.358.16 #1 0x00007fb5a553bbad in () at /usr/lib64/nvidia/libGL.so.1 #2 0x00007fb59f11f11f in () at /usr/lib64/nvidia/tls/libnvidia-tls.so.358.16 #3 0x00007fb59ffec823 in thread (userdata=0x55a1a94759c0) at pulse/thread-mainloop.c:83 m = 0x55a1a94759c0 There's a kde.org bug tracking other konsole deadlocks (usually on quit) in libnvidia-tls.so.358.16 too I can dig up an reference if you like
See also: https://bugs.kde.org/show_bug.cgi?id=343803 and https://devtalk.nvidia.com/default/topic/879586/kf5-konsole-15-04-and-15-08-consumes-100-cpu-on-close-only-with-proprietary-nvidia-driver/