Comment 2 for bug 1766503

i have multiple instances of ibus-x11 running simultaneously in Bionic 18.04. Up to 40% of CPU is used by them. Once i run htop, the processes automatically disappear a few seconds later and everything goes back to normal. In fact, i run htop now after every boot to deal with the problem. If i use System Activity (KDE) instead of htop, i see one entry, systemd, using up to 40% of CPU. If i kill it from there, it will reappear few minutes later.

System: Host: MyLinuxPC Kernel: 4.15.0-20-generic x86_64 bits: 64 Desktop: KDE Plasma 5.12.4
           Distro: Ubuntu 18.04 LTS
CPU: 8 core AMD FX-8320 Eight-Core (-MCP-) cache: 16384 KB

Graphics: Card: Advanced Micro Devices [AMD/ATI] Ellesmere [Radeon RX 470/480]
           Display Server: x11 (X.Org 1.19.6 ) drivers: ati,amdgpu (unloaded: modesetting,fbdev,vesa,radeon)
           Resolution: 2560x1440@59.95hz
           OpenGL: renderer: AMD Radeon RX 480 Graphics (POLARIS10 / DRM 3.23.0 / 4.15.0-20-generic, LLVM 6.0.0)
           version: 4.5 Mesa 18.0.0-rc5