SUMMARY STEPS TO REPRODUCE 1. Run desktop env with klipper 2. Copy a huge text content(something like 50Mb) OBSERVED RESULT Related process begins occupying 100% of one cpu core and plasma desktop freezes after a while, restarting session & system won't resolve EXPECTED RESULT Copy correctly and auto clean/warning if issue SOFTWARE VERSIONS Kubuntu 17.10 KDE Plasma 5.12.4 KDE Framework 5.44.0 Qt 5.9.1 Kernel 4.13.0-38-generic ADDITIONAL INFORMATION Manual solution is here : https://askubuntu.com/questions/1024071/plasmashell-freezes-crashes-once-restarted
*** This bug has been marked as a duplicate of bug 360262 ***