When my screen is locked, kwin_x11 and Xorg.bin are both using a lot of CPU:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4541 Alex 20 0 3916320 317172 218040 S 69.77 0.972 32:39.67 kwin_x11
4301 root 20 0 785208 210124 153988 R 52.16 0.644 26:34.57 Xorg.bin
This is happening on both my Tumbleweed computers. On my laptop, this started several months ago, and seem to only happen when I have external monitors connected. The other computer was just installed yesterday (and also has two monitors connected.)
What can I do to find out why (and stop it)?