I have a desktop machine what I would like to access remotely, but making all the 3D acceleration/framebuffering/etc working correctly.
However, to "help" my video card to understand, that yes, there is a monitor there with a given resolution, I think something would be needed to talk him as if a real monitor would do - except that it wouldn't have a display.
(The display will be transmitted over the network with my protocols, maybe vnc/rdp/spectre, but it is another story.)
I imagine a small (& cheap) usb device, whose other end is the HDMI port of my video card, and provides this little cheat. But any similar solutions would be okay. What I want to, make the video card to think, that he is actually giving HDMI video signal to a real display (whose properties can be configured by me).