[fritsch]

From the log it is only switch to [email protected]

23:01:30 T:4012 DEBUG: CWinSystemWin32::SetFullScreenEx (windowed fullscreen) on screen 0 with size 1920x1080, refresh 23.976023
...
23:01:30 T:7960 NOTICE: fps: 23.976024, pwidth: 1920, pheight: 1080, dwidth: 1920, dheight: 1080
23:01:30 T:7960 DEBUG: CDVDPlayerVideo::OutputPicture - change configuration. 1920x1080. framerate: 23.98. format: YV12
23:01:30 T:7960 NOTICE: Display resolution ADJUST : 1920x1080@ 23.98 - Full Screen (190) (weight: 0.000)

I don't see it switching to 4k at all, it switches to [email protected].

Btw. those 4k modes your TV announces:

23:01:21 T:4012 NOTICE: Additional mode: 3840x2160@ 29.97 - Full Screen
23:01:21 T:4012 NOTICE: Additional mode: 3840x2160@ 30.00 - Full Screen
23:01:21 T:4012 NOTICE: Additional mode: 3840x2160@ 29.97 - Full Screen
23:01:21 T:4012 NOTICE: Additional mode: 3840x2160@ 30.00 - Full Screen
23:01:21 T:4012 NOTICE: Additional mode: 3840x2160@ 29.97 - Full Screen
23:01:21 T:4012 NOTICE: Additional mode: 3840x2160@ 30.00 - Full Screen
23:01:21 T:4012 NOTICE: Additional mode: 4096x2160@ 23.98 - Full Screen
23:01:21 T:4012 NOTICE: Additional mode: 4096x2160@ 24.00 - Full Screen
23:01:21 T:4012 NOTICE: Additional mode: 4096x2160@ 25.00 - Full Screen
23:01:21 T:4012 NOTICE: Additional mode: 4096x2160@ 29.97 - Full Screen
23:01:21 T:4012 NOTICE: Additional mode: 4096x2160@ 30.00 - Full Screen