[dbezerra]

AHA! Found the issue. Reverted back to MadVR 0.87.14 and it's fixed.Versions .16 or .17 are messing up with full screen mode (exclusive or overlay), but only in Kodi/DSPlayer.

From Aracnoz:
can you make two logs in debug mode of madVR with version 0.87.14 and 0.87.17 and send them to madshi ... would be useful to have no problems with future of vesion of madVR
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I got more details about this issue. Also posted the same findings on MadVR forum:

1. Only when using DSPlayer (Kodi) with MadVR as a renderer in either Full screen exclusive or Full screen overlay
2. Have luma doubling set (# of neurons doesn't seem to matter)
3. Have the downscaling done by any of the custom pixel shader options (I use Catmull-Rom)

As soon as I change the downscaling to DXVA2 the problem goes away. It repros with version 0.87.17.

Question - do you know what could be causing this behavior only on DSPlayer? Do I lose quality by using DXVA2 instead of Catmull-Rom (looks like DXVA2 equals Bilinear for my NVIDIA card)

You will probably never downscale an image unless image doubling over the target resolution. The question is whether enabling DXVA overrides other settings (which it can). You can test this by looking at the rendering stats (Cntrl + J) during playback and checking what scaling algorithms are being used. Downscaling, in general, isn't all that important, but there could be limitations I'm not aware of.

I use downscaling after doubling 720p sources with 1080p as the final goal. I know I could just opt for Jinc upscaling but I prefer the doubling/downscaling method.