After leaving Konsole opened for several minutes on Arch Linux, it starts using 100% of any given CPU core/thread. The process does not close when closing Konsole and it continues using 100% of CPU as well. "killall konsole" or ending the konsole process from KSysGuard will close it and the CPU usage will drop back to normal idle values immediately. Reproducible: Always Steps to Reproduce: 1. Open a Konsole window 2. Leave it opened for several minutes 3. Keep an eye on the konsole process in top or KSysGuard Actual Results: Konsole was using 13% of my CPU, which is 100% of one thread on a hyperthreaded quad-core CPU. Expected Results: Konsole should have continued only using a fraction of a percent of my CPU as it does normally when idle. uname -a output: Linux rainbowdash 4.0.7-2-ARCH #1 SMP PREEMPT Tue Jun 30 07:50:21 UTC 2015 x86_64 GNU/Linux CPU: Intel Core i7-4790K @ 4.0 GHz
I can confirm this bug in Debian Testing. In addition, it's not necessary to leave Konsole idle for a period - simply opening and immediately closing Konsole will also leave the konsole process running with 100% of one CPU core.
I confirm this bug on Kubuntu 15.04
I get this also after closing konsole window with telnet session. Konsole window closed and not shown on the screen, but process still here and eat 100% cpu. Kubuntu 15.04 with Plasma 5.3 (15.04.0 KDE Frameworks 5.12.0)
It appears to have been fixed in a recent patch as I have not had the issue recently. Still using the latest Arch Linux packages. Not sure when these will be pushed on to Debian and Kubuntu.
I'm consistently getting this problem. Distribution: Fedora release 22 Kernel: 4.2.3-200.fc22.x86_64 Qt: 5.5.0 KDE Frameworks: 5.15.0 Konsole: 15.08.1