i.MX 6 DL v-sync

I’ve been trying to use vertical sync in my OpenGL ES application.
But I didn’t.

My environment is below:
Image : Debian 8.3 Jessie for i.MX6 boards - February 2016 (kernel 3.14.28) - Boundary Devices
Graphics driver : vivante
OpenGL ES version : 3.0

Also I tried to use FB_MULTI_BUFFER and eglSwapInterval, but I did not work it.
And I’m ready to tell you some informations what you need to solve this issue.
Any ideas?

Please have a look at NXP’s i.MX 6 Graphics User’s Guide. Regarding support for random images from random vendors please enquire them about it.