[p750mmx]

It did not work for me and I think for many others.
I had a working Kodi 17 MVC on Windows 10 v1709 and the movies were sent to the TV in FULL HD frame packed 3D.
After the update to v1803 I never get 3D back on working. I rolled windows back and everthing was fine again.

So how you get it working on v1803?

Can't answer that specific, I always upgraded my Windows installation, so also to 1803. I can't recall any problems with that.
Maybe it's hardware (or driver) specific? I've upgraded to HDMI 2.0a before 1803 so Frame packed 3D was already out of the picture with that. With my setup that was not a problem.
After comparing hardware based 3D with Interlaced passive 3D on a 4k TV (with 2 test-systems), there was not one reason to hold on to the frame packed setup.

Edit: @te36, not anymore. You can read my signature to see the (2015) Oled model I have. The 2016 Oled models were also able to display 3D and then LG pulled the plug on that with the newer models. When I made the step to 4k Oled, I did that with my HTPC's also, and so I discovered that the 17 MVC build of Kodi could be used for Hardware Based 3D trough HDMI 1.4 and Full HD 3D on my 4K TV, by using the Interlaced method. I did a comparison some time ago, placed in this topic.