No 4k output on s905w

[Compent]

I’m afraid that you aren’t providing much in the way of information.

Logs can be useful

How to post debug logs

Please follow new CoreELEC Wiki https://wiki.coreelec.org/coreelec:debuglogs Before posting a error Did you try a clean install? How the error can be reproduced? If your issue is not solved by a clean install: Please follow this guide to retrieve a debug log of the system: Enable debug logging in Kodi settings. Reboot your device, reproduce your issue and then follow the steps below. Settings CoreELEC System Upload latest ... [Post_log] You will get a http://ix.io URL with your debug…

Do you have any sample of the type of media that is not playing correctly?