What I have: home built machine, i4790k, GeForce GTX 970 video card, 2 Asus v278 27" monitors.
What I want: a panoramic virtual cockpit video setup just like Mark has in his Twin Otter sim starting with 2 monitors and eventually expanding to 3.
I've checked every forum I can find and there are thousands of "solutions". Many contradictory, it seems. None work for me. I've done everything I can think of. Maybe waving a dead chicken over the system would help. I would explain what all I have tried but I doubt anyone has that kind of free time.
So, Mark, since you seem to be one of the most helpful lucid members of the sim community, I'm wondering if you could share how your video system (hardware & software) is configured, what, if any, changes you made to FSX, *.cfg files, what hardware (matrox th2go?), etc. at this point, my interest is in the virtual cockpit displays. I'll tackle instrument displays later, after all of this frustration wears off.
I appreciate any attempt to rescue me from insanity.
My setup is very simple. I have three 19" displays connected to three of the inputs of an nvidia GTX670, with nvidia 2D Surround enabled. The three monitors appear to Windows as a single screen, dimensions 3840x1024. (I used the nvidia bezel compensation to create an additional resolution of 4066x1024, which is the one I use in FSX.) I have not made any changes to fsx.cfg, FSX knows how to handle a display and this is just another display.
So my advice is that you need to enable nvidia Surround in the nvidia control panel. There is a wizard to do this. Then you will see some new resolutions appear in your FSX 'full-screen resolution' dialog box (options/settings/display). Assuming your monitors are 1080p, one of these resolutions will be 3840x1080x32. You may have others if you have set up bezel management. Select one of these. You should then find that your main FSX window stretches across the two displays. Don't make any changes in fsx.cfg.
One possible thing to check - there was a time that nvidia Surround did not work across two monitors, you could only do it with three, but I am assuming that it is now possible with two as I read this somewhere.
Hmmm... On my older desktop with two GTX 580's in SLI and two identical monitors attached, I was able to successfully setup both monitors in 2D surround with bezel correction without issue. Even Dev Mgr indicates only one monitor while in 2D surround, which is correct. However, I was unable to make FSX run on both monitors in either full screen or maximized, it would only display on the second monitor. Running FSX in a window does allow the window to be stretched across both screens. I am running WideViewAspect=True in the .cfg on both my desktops (not sure that matters though). I'm probably forgetting something extremely simple as it's been awhile since I've messed with multiple monitors and FSX. Interesting problem. I'll look into it more.
Edit: Whoops! Simply forgot to select the correct resolution in the FSX settings display options! Works fine with two monitors. Guess I didn't read your response very well Mark.
If you mean how do you do it, you click the right button in the wizard and follow the instructions. If you mean what does it do, it makes the display behave as if it had no bezels. I could try to explain what this means but if you don't get it it will probably take half a page and you still wouldn't get it! Just try it out. The most obvious benefit is that when you bank the aircraft your horizon will look right.