Jan 3, 2012
It seems there are lots of problems with 3D Vision when you have a PC setup with two monitors connected. Some time ago I moved to use my non-3D capable NEC monitor as the main one, and a 3D enabled Acer monitor as the secondary monitor. I love the Acer monitor, but in terms of colors and image quality it is nowhere near my NEC monitor. After that I leaned few things about restrictions of the 3D Vision drivers.
Discovery number 1: 3D Vision works only on the primary monitor. This means, if you have a 3D enabled monitor as a secondary display, there is no easy way to make it work with 3D Vision.
Discovery number 2: Even if you set your 3D monitor as primary in Windows (or NVidia) settings, you will get very interesting glitches when trying to activate 3D Vision mode. I got two main problems. First – my 3D enabled Acer monitor would start acting really weird, and 3D Vision would display a red message saying something like “attempting to display stereoscopic content in non stereoscopic mode”. Second thing – even when 3D Vision is off, the glasses would occasionally blink asynchronously. This can drive you mad after some time.
My guess is that when you have 60Hz non 3D monitor and 120Hz 3D monitor connected at the same time, the system would clock them both to 60Hz, causing problems for 3D Vision. Considering that this is completely up for an NVidia GTX 295 card I have, this sounds more like a drivers issue.
The solution so far: activate 3D monitor as a primary one, then turn off a non 3D monitor and disable it from the Windiws/NVidia settings. After that 3D Vision starts working with no further problems.
