The plasma process takes up 130-140% CPU whenever files are being copied. This is similar to the problem with taking up >100% CPU whenever connecting to a network, therefore I'm guessing the spinning animation in Plasma is the culprit. To reproduce: 1. Copy a big file from A to B Happens every time. Hardware: Intel Ivy Bridge CPU with HD3000 GPU System: Fedora 24, modesetting Xorg driver, Plasma with OpenGL
*** This bug has been marked as a duplicate of bug 378010 ***