OpenGL application loads one of the CPU cores up to 100%


I have following system:

  • ubuntu 12.04.4 amd64 LTS
  • nvidia nvs 510
  • Intel® Core™ i7-4770S CPU @ 3.10GHz
  • 16GB of RAM
  • driver version is: 331.20 and 331.38 (I tried both)
  • 4 displays, one is 1920x1080 (for admin & monitoring), 3 displays are 1080x1920 and used as output for application (one big OpenGL window stetched to fit 3 displays)

When I start glxgears (or any other OpenGL-based app) on this machine I have 100% usage for one of the CPU cores.
Here is result from “htop” output.

This occurs on both 331.20 & 331.38 drivers.
This issue does not occur on other PC which has GeForce GT620 graphics card.

Any ideas why is it happening?

Any information & advices will be very helpful for us.
Thanks in advance.
nvidia-bug-report.log.gz (194 KB)