OpenGL screen tearing with vsync on or off (vsync not working)

[robertus27]

opengl vsync is not working for me
I'm using windows 8.1, dolphin 4.0-9125, gtx 970, dolphin opengl config vsync on, and i still have screen tearing
in nvidia control panel i tried forcing vsync on for dolphin but i still have screen tearing
i tried borderless fullscreen on, screen tearing is still there

yesterday it is working fine, but i turn on/off vsync a lot in dolphin opengl menu, and today opengl vsync is not working
i dont have this problem using dolphin dx11 or other emulator/games (opengl and dx11), so the problem is only on dolphin opengl

please help me, thanks a lot

[JMC47]

If Dolphin's Vsync isn't working, you're not achieving exclusive fullscreen.

[robertus27]

If Dolphin's Vsync isn't working, you're not achieving exclusive fullscreen.

Thanks for your reply
what should i do to get exclusive fullscreen? I dont see in it in dolphin menu