[Bibio]

nope never said that my playerfactory was any different to the rest.

card in the upstairs computer is a Radion R7 250 1gig. card in the Downstairs HTPC is GTX 1050ti 4gig.

processor and memory in the PC upstairs is exactly the same as the downstairs HTPC.

i'm using a 1080p monitor upstairs. and a 65'' UHD HDR tv downstairs.

upstairs PC plays everything as it should excluding 4k HDR, it plays 4k but as you would expect is juddery and no HDR switching.
exiting the external player (MPC-BE+madVR) set in the playerfactory from within Kodi on the upstairs PC results in no problems.

downstairs PC plays everything as it should including 4k and HDR switching with no judder and is smooth playback.
the problem on the downstairs HTPC is that when exiting the external player from within Kodi results in very weird behaviour.
i will get first play of 4k HDR with no problems and exiting to Kodi is perfect.
Second play of 4k HDR results in 3 random behaviours when exiting the external player. one is that Kodi will minimise to the taskbar. another is that the resolution will drop to 800x600 or 1920x1080 then kodi will allow the taskbar to show. the other is that kodi will take itself out of full screen and resize to a small square on the desktop.

Kodi is set up as full screen 3840x2160. i have tried 1920x1080 and results are the same as above.

HD and SD content so far seems not to be affected.

i have been using kodi with the built in player and running on win7 for roughly the past 3 years without a glitch. i have also modded the xonfluence skin so i'm not adverse to doing a bit of codding. i'm not using the modded skin in the tests.

my new amp is here so will get everything hooked up tonight.