SNA+Dual monitor=High CPU

When SNA with dual monitor configuration is used and on both monitor video is played(with hw acceleration) CPU is very high, about 90%.

With same configuration and UXA, or with single monitor and two videos CPU is about 20%.

My OS is Ubuntu 14.04, but I tested and on 13.10 and 13.04. Also, I used latest 1.06 driver, and several olders. This problem is also tested on Fedora and on different processors: Celeron  887, i3 3217U, Celeron J1900......but stil exist

So, I beleive SNA have bug with dual configuration monitor.

If anybody know how to solve this problem or where to submit bug I'll appreciate that :)

Best Regards

goxy