high system load / unresponsive system when placed in "intelligently" hidden panel

Submitted by gon..@..mx.net

Assigned to Florian Rivoal

Link to original bug (#14315)

Description

A very high system load occurs up to the point that the system becomes unresponsive if the verve plugin is used. The behaviour is confirmed in Xubuntu 16.04 and the upcoming Xubuntu 18.04.

To reproduce the behaviour do:

1. create an second, empty panel and move it to the bottom of the desktop
2. place the verve command line within the panel -> Note: up to this point the behaviour is alright when using the verve command line
3. configure the panel to hide "intelligently" and close all config dialogs
4. try to use the verve command line

The result should be high processor load and a flickering mouse pointer and panel. I just had to hard reset my machine, because it stalled.