[mclingo]

I just updated to the latest DS and I can now run my GUI at 4k again, no black screens. Have you up to date with in updates, there was an update to DIRECTX which may also help.  

I don't use reclock and I use refresh rate switching with madvr , windows 10 with latest creators update with AMD and I don' thave any frame drops or any of these issues you are posting about.  Sanear is better because it's open source where reclock is not open source, so it can't be baked in.  

I find this hard to understand, i'm really interested to know more about this, can  you answer a few questions as best you can?

1. which media player are you using?
2. are you using native or copy back in LAV filters
3. What is you PC desktop resolution?
4. Which options do you have ticked in MADVR rendering?
5. press control J when playing a movie and post a screen shot if you dont mind.
6. Which AMD driver version are you using?
7. Which model of AMD card do you have?
8. Are you using all latest versions of software and drivers?

Thanks   

lastest amd drivers ( rx480 card )  latest madvr version.   1080p rest.   kodi dsplayer and mpc-hc with madvr.  with refresh rate switching enabled on all.  and i'm using d3d11 copy back in lavfilters.  

 Is your desktop res 4k? but kodi menu 1080p, what is 1080p?