I have non reproducible freezes of konsole, from time to time.
The backtrace shows that the thread is frozen in a PulseAudio loop. I have
created a bug report:
https://bugzilla.redhat.com/show_bug.cgi?id=1332855
The bug is assigned to pulseaudio, but it might be due to Phonon, or something
else from the KF5 stack.
--
Laurent Rineau
http://fedoraproject.org/wiki/LaurentRineau