I understand the resolution of the projector is 1920x1080 60hz and you are wanting to use it at 1920x1080 120hz?
if that's the way it often does not supported by the vertical refresh of the projector does not get going from 60hz, so it can not display the image
I used google translator to read your text and got a little confused
Sorry for bad English.
Thanks for the answer. But a problem in other.
Projector's native resolution is 1920x1080 with max 60 Hz. It perfect for 2D video.
When i connect projector to HDMI output, Intel HD driver sets 1920x1080 (60p) by default. It's OK!
But when i want watch 3D video, need get real resolution 1280x800 (120 Hz) to synchronize with active 3d glasses. This mode supported by projector (tested by Nvidia's videocard) and avaliable in Intel HD driver on HDMI output, but when i select and apply it, projector says "Unsupported mode".
I think, this is happens because Intel HD driver simply scales resolution and doesn't change real resolution from 1920x1080 to 1280x800. In this case Intel HD driver tries send signal with 1920x1080 @ 120 Hz and this is reason of projector's error.
My question is: How to force Intel HD driver send signal accurate with 1280 X 800 @ 120 hz?
Hello Max, bear in mind that the maximum resolutions for Intel 4th generation processor family are the following.
As you can see the highest refresh rate is 60Hz.
In addition to that, it is important to know that your processor does not come with Intel® InTru™ 3D Technology.
As I previously said: "When i connect projector to HDMI output, Intel HD driver sets 1920x1080 (60p) by default. It's OK!" - I'm not trying set 1920x1080 @ 120 Hz.
"In addition to that, it is important to know that your processor does not come with Intel® InTru™ 3D Technology."
Yes, I know. But stereo player uses "software pageflipping", so don't need use Intel® InTru™ 3D Technology.
Problem is that Intel HD driver always sends real signal with native resolution via HDMI output (in my case it 1920x1080 @ 60 Hz), regardless resolution of windows or driver settings. For example, I'm trying set 1024 x 768 @ 60 Hz in driver settings: Driver changes resolution and auto scales it to fullscreen, but projector reports that real resolution is still 1920x1080 @ 60 Hz.
And the most important thing, that all working fine when i connect projector to VGA output: for example, i can set 1024x768 @ 120 Hz, and Intel HD driver sends real signal with 1024x768 @ 120 Hz ! (projector reports real resolution), so i can properly synchronize my 3d glasses. But i don't want to use VGA output, because image is worse than via HDMI.
My question is still unchanged: How to force Intel HD driver send real signal with 1280 X 800 @ 120 hz (via HDMI)?
Max, on one side you mentioned that you are not trying to set 1920x1080@120 Hz, but in the other side you are asking me how to force the driver to 1280 X 800 @ 120 hz (via HDMI)?
As I explained you before, our HD graphics driver reach up to 60Hz.
I suggest you to wait if another user have an answer for your question.