Description of problem: When I launch a konsole, e.g. for dnf upgrade, when I finish and quit the konsole I have a processus konsole (a zombie ?) with 25% CPU occupation. I am obliged to launch a new konsole and do a "killall konsole" to stop this processus. I don't know where I can see a log for konsole5.
For info, the problem is also present in Fedora 24 rawhide.
Are you using nvidia driver?
Yes rex I use nvidia driver. And on my Fedora 24 rawhide the problem appeared since I installed nvidia driver, with nouveau no problem.
OK, there are some upstram kde bugs tracking that, but it does appear to be an nvidia bug (the processes hang inside one of nvidia libraries)
Tracked here, https://bugs.kde.org/show_bug.cgi?id=343803 for now (though really, nvidia needs to fix it).