X CPU at 99% even after leaving.

[Google Code Exporter]

What steps will reproduce the problem?
1. Start the software
2.
3.

What is the expected output? What do you see instead?
The software work well, but if you do a top to check the process, X goes up to 
99% cpu after a few seconds. And once you leave the software it stay at 99%. 
It's seems that some graphic rendering bring problem with X.


What version of the product are you using? On what operating system?
Last CVS one

Please provide any additional information below.
You actually never notice the problem until you start to monitor the CPU and 
top.

Original issue reported on code.google.com by stephanejourney on 7 Apr 2014 at 1:36